nm-settings-dbus

package: NetworkManager-daemon

title: nm-settings-dbus(5)

summary: Description of settings and properties of NetworkManager connection profiles on the D\-Bus API

text:
# nm-settings-dbus(5)

## NAME
nm-settings-dbus - Description of settings and properties of NetworkManager connection profiles on the D-Bus API

## DESCRIPTION
NetworkManager is based on a concept of connection profiles, sometimes referred to as connections only. These connection profiles contain a network configuration. When NetworkManager activates a connection profile on a network device the configuration will be applied and an active network connection will be established. Users are free to create as many connection profiles as they see fit. Thus they are flexible in having various network configurations for different networking needs. The connection profiles are handled by NetworkManager via settings service and are exported on D-Bus (/org/freedesktop/NetworkManager/Settings/<num> objects). The conceptual objects can be described as follows:

Connection (profile)

A specific, encapsulated, independent group of settings describing all the configuration required to connect to a specific network. It is referred to by a unique identifier called the UUID. A connection is tied to a one specific device type, but not necessarily a specific hardware device. It is composed of one or more Settings objects.

Setting

A group of related key/value pairs describing a specific piece of a Connection (profile). Settings keys and allowed values are described in the tables below. Keys are also referred to as properties. Developers can find the setting objects and their properties in the libnm-core sources. Look for the *_class_init functions near the bottom of each setting source file.

The settings and properties shown in tables below list all available connection configuration options. However, note that not all settings are applicable to all connection types. NetworkManager provides a command-line tool nmcli that allows direct configuration of the settings and properties according to a connection profile type. nmcli connection editor has also a built-in describe command that can display description of particular settings and properties of this page.

### connection setting
General Connection Profile Settings.

Key Name

Value Type

Default Value

Value Description

auth-retries

int32

-1

The number of retries for the authentication. Zero means to try indefinitely; -1 means to use a global default. If the global default is not set, the authentication retries for 3 times before failing the connection. Currently, this only applies to 802-1x authentication.

autoconnect

boolean

TRUE

Whether or not the connection should be automatically connected by NetworkManager when the resources for the connection are available. TRUE to automatically activate the connection, FALSE to require manual intervention to activate the connection. Autoconnect happens when the circumstances are suitable. That means for example that the device is currently managed and not active. Autoconnect thus never replaces or competes with an already active profile. Note that autoconnect is not implemented for VPN profiles. See "secondaries" as an alternative to automatically connect VPN profiles. If multiple profiles are ready to autoconnect on the same device, the one with the better "connection.autoconnect-priority" is chosen. If the priorities are equal, then the most recently connected profile is activated. If the profiles were not connected earlier or their "connection.timestamp" is identical, the choice is undefined. Depending on "connection.multi-connect", a profile can (auto)connect only once at a time or multiple times.

autoconnect-ports

int32

-1

Whether or not ports of this connection should be automatically brought up when NetworkManager activates this connection. This only has a real effect for controller connections. The properties "autoconnect", "autoconnect-priority" and "autoconnect-retries" are unrelated to this setting. The permitted values are: 0: leave port connections untouched, 1: activate all the port connections with this connection, -1: default. If -1 (default) is set, global connection.autoconnect-ports is read to determine the real value. If it is default as well, this fallbacks to 0.

autoconnect-priority

int32

0

The autoconnect priority in range -999 to 999. If the connection is set to autoconnect, connections with higher priority will be preferred. The higher number means higher priority. Defaults to 0. Note that this property only matters if there are more than one candidate profile to select for autoconnect. In case of equal priority, the profile used most recently is chosen.

autoconnect-retries

int32

-1

The number of times a connection should be tried when autoactivating before giving up. Zero means forever, -1 means the global default (4 times if not overridden). Setting this to 1 means to try activation only once before blocking autoconnect. Note that after a timeout, NetworkManager will try to autoconnect again.

autoconnect-slaves

NMSettingConnectionAutoconnectSlaves (int32)

Whether or not ports of this connection should be automatically brought up when NetworkManager activates this connection. This only has a real effect for controller connections. The properties "autoconnect", "autoconnect-priority" and "autoconnect-retries" are unrelated to this setting. The permitted values are: 0: leave port connections untouched, 1: activate all the port connections with this connection, -1: default. If -1 (default) is set, global connection.autoconnect-slaves is read to determine the real value. If it is default as well, this fallbacks to 0. Deprecated 1.46. Use "autoconnect-ports" instead, this is just an alias.

controller

string

Interface name of the controller device or UUID of the controller connection.

dns-over-tls

int32

-1

Whether DNSOverTls (dns-over-tls) is enabled for the connection. DNSOverTls is a technology which uses TLS to encrypt dns traffic. The permitted values are: "yes" (2) use DNSOverTls and disabled fallback, "opportunistic" (1) use DNSOverTls but allow fallback to unencrypted resolution, "no" (0) don't ever use DNSOverTls. If unspecified "default" depends on the plugin used. Systemd-resolved uses global setting. This feature requires a plugin which supports DNSOverTls. Otherwise, the setting has no effect. One such plugin is dns-systemd-resolved.

down-on-poweroff

int32

-1

Whether the connection will be brought down before the system is powered off. The default value is -1 (default). When the default value is specified, then the global value from NetworkManager configuration is looked up, if not set, it is considered as 0 (no).

gateway-ping-timeout

uint32

0

If greater than zero, delay success of IP addressing until either the timeout is reached, or an IP gateway replies to a ping.

id

string

A human readable unique identifier for the connection, like "Work Wi-Fi" or "T-Mobile 3G".

interface-name

string

The name of the network interface this connection is bound to. If not set, then the connection can be attached to any interface of the appropriate type (subject to restrictions imposed by other settings). For software devices this specifies the name of the created device. For connection types where interface names cannot easily be made persistent (e.g. mobile broadband or USB Ethernet), this property should not be used. Setting this property restricts the interfaces a connection can be used with, and if interface names change or are reordered the connection may be applied to the wrong interface.

ip-ping-addresses

array of string

The property specifies a list of target IP addresses for pinging. When multiple targets are set, NetworkManager will start multiple ping processes in parallel. This property can only be set if connection.ip-ping-timeout is set. The ip-ping-timeout is used to delay the success of IP addressing until either the specified timeout (in seconds) is reached, or an target IP address replies to a ping. Configuring "ip-ping-addresses" may delay reaching the systemd's network-online.target due to waiting for the ping operations to complete or timeout.

ip-ping-addresses-require-all

int32

-1

The property determines whether it is sufficient for any ping check to succeed among "ip-ping-addresses", or if all ping checks must succeed for "ip-ping-addresses".

ip-ping-timeout

uint32

0

If greater than zero, delay success of IP addressing until either the specified timeout (in seconds) is reached, or a target IP address replies to a ping. The property specifies the timeout for the "ip-ping-addresses". This property is incompatible with "gateway-ping-timeout", you cannot set these two properties at the same time.

lldp

int32

-1

Whether LLDP is enabled for the connection.

llmnr

int32

-1

Whether Link-Local Multicast Name Resolution (LLMNR) is enabled for the connection. LLMNR is a protocol based on the Domain Name System (DNS) packet format that allows both IPv4 and IPv6 hosts to perform name resolution for hosts on the same local link. The permitted values are: "yes" (2) register hostname and resolving for the connection, "no" (0) disable LLMNR for the interface, "resolve" (1) do not register hostname but allow resolving of LLMNR host names If unspecified, "default" ultimately depends on the DNS plugin (which for systemd-resolved currently means "yes"). This feature requires a plugin which supports LLMNR. Otherwise, the setting has no effect. One such plugin is dns-systemd-resolved.

master

string

Interface name of the controller device or UUID of the controller connection. Deprecated 1.46. Use "controller" instead, this is just an alias.

mdns

int32

-1

Whether mDNS is enabled for the connection. The permitted values are: "yes" (2) register hostname and resolving for the connection, "no" (0) disable mDNS for the interface, "resolve" (1) do not register hostname but allow resolving of mDNS host names and "default" (-1) to allow lookup of a global default in NetworkManager.conf. If unspecified, "default" ultimately depends on the DNS plugin. This feature requires a plugin which supports mDNS. Otherwise, the setting has no effect. Currently the only supported DNS plugin is systemd-resolved. For systemd-resolved, the default is configurable via MulticastDNS= setting in resolved.conf.

metered

NMMetered (int32)

Whether the connection is metered. When updating this property on a currently activated connection, the change takes effect immediately.

mptcp-flags

uint32

0

Whether to configure MPTCP endpoints and the address flags. If MPTCP is enabled in NetworkManager, it will configure the addresses of the interface as MPTCP endpoints. Note that IPv4 loopback addresses (127.0.0.0/8), IPv4 link local addresses (169.254.0.0/16), the IPv6 loopback address (::1), IPv6 link local addresses (fe80::/10), IPv6 unique local addresses (ULA, fc00::/7) and IPv6 privacy extension addresses (rfc3041, ipv6.ip6-privacy) will be excluded from being configured as endpoints. If "disabled" (0x1), MPTCP handling for the interface is disabled and no endpoints are registered. The "enabled" (0x2) flag means that MPTCP handling is enabled. This flag can also be implied from the presence of other flags. Even when enabled, MPTCP handling will by default still be disabled unless "/proc/sys/net/mptcp/enabled" sysctl is on. NetworkManager does not change the sysctl and this is up to the administrator or distribution. To configure endpoints even if the sysctl is disabled, "also-without-sysctl" (0x4) flag can be used. In that case, NetworkManager doesn't look at the sysctl and configures endpoints regardless. Even when enabled, NetworkManager will only configure MPTCP endpoints for a certain address family, if there is a unicast default route (0.0.0.0/0 or ::/0) in the main routing table. The flag "also-without-default-route" (0x8) can override that. When MPTCP handling is enabled then endpoints are configured with the specified address flags "signal" (0x10), "subflow" (0x20), "backup" (0x40), "fullmesh" (0x80). See ip-mptcp(8) manual for additional information about the flags. If the flags are zero (0x0), the global connection default from NetworkManager.conf is honored. If still unspecified, the fallback is "enabled,subflow". Note that this means that MPTCP is by default done depending on the "/proc/sys/net/mptcp/enabled" sysctl. NetworkManager does not change the MPTCP limits nor enable MPTCP via "/proc/sys/net/mptcp/enabled". That is a host configuration which the admin can change via sysctl and ip-mptcp. Strict reverse path filtering (rp_filter) breaks many MPTCP use cases, so when MPTCP handling for IPv4 addresses on the interface is enabled, NetworkManager would loosen the strict reverse path filtering (1) to the loose setting (2).

mud-url

string

If configured, set to a Manufacturer Usage Description (MUD) URL that points to manufacturer-recommended network policies for IoT devices. It is transmitted as a DHCPv4 or DHCPv6 option. The value must be a valid URL starting with "https://". The special value "none" is allowed to indicate that no MUD URL is used. If the per-profile value is unspecified (the default), a global connection default gets consulted. If still unspecified, the ultimate default is "none".

multi-connect

int32

0

Specifies whether the profile can be active multiple times at a particular moment. The value is of type NMConnectionMultiConnect.

permissions

array of string

An array of strings defining what access a given user has to this connection. If this is NULL or empty, all users are allowed to access this connection; otherwise users are allowed if and only if they are in this list. When this is not empty, the connection can be active only when one of the specified users is logged into an active session. Each entry is of the form "[type]:[id]:[reserved]"; for example, "user:dcbw:blah". At this time only the "user" [type] is allowed. Any other values are ignored and reserved for future use. [id] is the username that this permission refers to, which may not contain the ":" character. Any [reserved] information present must be ignored and is reserved for future use. All of [type], [id], and [reserved] must be valid UTF-8.

port-type

string

Setting name of the device type of this port's controller connection (eg, "bond"), or NULL if this connection is not a port.

read-only

boolean

FALSE

FALSE if the connection can be modified using the provided settings service's D-Bus interface with the right privileges, or TRUE if the connection is read-only and cannot be modified.

secondaries

array of string

List of connection UUIDs that should be activated when the base connection itself is activated. Currently, only VPN connections are supported.

slave-type

string

Setting name of the device type of this port's controller connection (eg, "bond"), or NULL if this connection is not a port. Deprecated 1.46. Use "port-type" instead, this is just an alias.

stable-id

string

This represents the identity of the connection used for various purposes. It allows configuring multiple profiles to share the identity. Also, the stable-id can contain placeholders that are substituted dynamically and deterministically depending on the context. The stable-id is used for generating IPv6 stable private addresses with ipv6.addr-gen-mode=stable-privacy. It is also used to seed the generated cloned MAC address for ethernet.cloned-mac-address=stable and wifi.cloned-mac-address=stable. It is also used to derive the DHCP client identifier with ipv4.dhcp-client-id=stable, the DHCPv6 DUID with ipv6.dhcp-duid=stable-[llt,ll,uuid] and the DHCP IAID with ipv4.iaid=stable and ipv6.iaid=stable. Note that depending on the context where it is used, other parameters are also seeded into the generation algorithm. For example, a per-host key is commonly also included, so that different systems end up generating different IDs. Or with ipv6.addr-gen-mode=stable-privacy, also the device's name is included, so that different interfaces yield different addresses. The per-host key is the identity of your machine and stored in /var/lib/NetworkManager/secret_key. See NetworkManager(8) manual about the secret-key and the host identity. The '$' character is treated special to perform dynamic substitutions at activation time. Currently, supported are "${CONNECTION}", "${DEVICE}", "${MAC}", "${NETWORK_SSID}", "${BOOT}", "${RANDOM}". These effectively create unique IDs per-connection, per-device, per-SSID, per-boot, or every time. The "${CONNECTION}" uses the profile's connection.uuid, the "${DEVICE}" uses the interface name of the device and "${MAC}" the permanent MAC address of the device. "${NETWORK_SSID}" uses the SSID for Wi-Fi networks and falls back to "${CONNECTION}" on other networks. Any unrecognized patterns following '$' are treated verbatim, however are reserved for future use. You are thus advised to avoid '$' or escape it as "$$". For example, set it to "${CONNECTION}-${BOOT}-${DEVICE}" to create a unique id for this connection that changes with every reboot and differs depending on the interface where the profile activates. If the value is unset, a global connection default is consulted. If the value is still unset, the default is "default${CONNECTION}" go generate an ID unique per connection profile.

timestamp

uint64

0

The time, in seconds since the Unix Epoch, that the connection was last _successfully_ fully activated. NetworkManager updates the connection timestamp periodically when the connection is active to ensure that an active connection has the latest timestamp. The property is only meant for reading (changes to this property will not be preserved).

type

string

Base type of the connection. For hardware-dependent connections, should contain the setting name of the hardware-type specific setting (ie, "802-3-ethernet" or "802-11-wireless" or "bluetooth", etc), and for non-hardware dependent connections like VPN or otherwise, should contain the setting name of that setting type (ie, "vpn" or "bridge", etc).

uuid

string

A universally unique identifier for the connection, for example generated with libuuid. It should be assigned when the connection is created, and never changed as long as the connection still applies to the same network. For example, it should not be changed when the "id" property or NMSettingIP4Config changes, but might need to be re-created when the Wi-Fi SSID, mobile broadband network provider, or "type" property changes. The UUID must be in the format "2815492f-7e56-435e-b2e9-246bd7cdc664" (ie, contains only hexadecimal characters and "-").

wait-activation-delay

int32

-1

Time in milliseconds to wait for connection to be considered activated. The wait will start after the pre-up dispatcher event. The value 0 means no wait time. The default value is -1, which currently has the same meaning as no wait time.

wait-device-timeout

int32

-1

Timeout in milliseconds to wait for device at startup. During boot, devices may take a while to be detected by the driver. This property will cause to delay NetworkManager-wait-online.service and nm-online to give the device a chance to appear. This works by waiting for the given timeout until a compatible device for the profile is available and managed. The value 0 means no wait time. The default value is -1, which currently has the same meaning as no wait time.

zone

string

The trust level of a the connection. Free form case-insensitive string (for example "Home", "Work", "Public"). NULL or unspecified zone means the connection will be placed in the default zone as defined by the firewall. When updating this property on a currently activated connection, the change takes effect immediately.

### 6lowpan setting
6LoWPAN Settings.

Key Name

Value Type

Default Value

Value Description

parent

string

If given, specifies the parent interface name or parent connection UUID from which this 6LowPAN interface should be created.

### 802-1x setting
IEEE 802.1x Authentication Settings.

Key Name

Value Type

Default Value

Value Description

altsubject-matches

array of string

List of strings to be matched against the altSubjectName of the certificate presented by the authentication server. If the list is empty, no verification of the server certificate's altSubjectName is performed.

anonymous-identity

string

Anonymous identity string for EAP authentication methods. Used as the unencrypted identity with EAP types that support different tunneled identity like EAP-TTLS.

auth-timeout

int32

0

A timeout for the authentication. Zero means the global default; if the global default is not set, the authentication timeout is 25 seconds.

ca-cert

byte array

Contains the CA certificate if used by the EAP method specified in the "eap" property. Certificate data is specified using a "scheme"; three are currently supported: blob, path and pkcs#11 URL. When using the blob scheme this property should be set to the certificate's DER encoded data. When using the path scheme, this property should be set to the full UTF-8 encoded path of the certificate, prefixed with the string "file://" and ending with a terminating NUL byte. This property can be unset even if the EAP method supports CA certificates, but this allows man-in-the-middle attacks and is NOT recommended. Note that enabling NMSetting8021x:system-ca-certs will override this setting to use the built-in path, if the built-in path is not a directory.

ca-cert-password

string

The password used to access the CA certificate stored in "ca-cert" property. Only makes sense if the certificate is stored on a PKCS#11 token that requires a login.

ca-cert-password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "ca-cert-password" property.

ca-path

string

UTF-8 encoded path to a directory containing PEM or DER formatted certificates to be added to the verification chain in addition to the certificate specified in the "ca-cert" property. If NMSetting8021x:system-ca-certs is enabled and the built-in CA path is an existing directory, then this setting is ignored.

client-cert

byte array

Contains the client certificate if used by the EAP method specified in the "eap" property. Certificate data is specified using a "scheme"; two are currently supported: blob and path. When using the blob scheme (which is backwards compatible with NM 0.7.x) this property should be set to the certificate's DER encoded data. When using the path scheme, this property should be set to the full UTF-8 encoded path of the certificate, prefixed with the string "file://" and ending with a terminating NUL byte.

client-cert-password

string

The password used to access the client certificate stored in "client-cert" property. Only makes sense if the certificate is stored on a PKCS#11 token that requires a login.

client-cert-password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "client-cert-password" property.

domain-match

string

Constraint for server domain name. If set, this list of FQDNs is used as a match requirement for dNSName element(s) of the certificate presented by the authentication server. If a matching dNSName is found, this constraint is met. If no dNSName values are present, this constraint is matched against SubjectName CN using the same comparison. Multiple valid FQDNs can be passed as a ";" delimited list.

domain-suffix-match

string

Constraint for server domain name. If set, this FQDN is used as a suffix match requirement for dNSName element(s) of the certificate presented by the authentication server. If a matching dNSName is found, this constraint is met. If no dNSName values are present, this constraint is matched against SubjectName CN using same suffix match comparison. Since version 1.24, multiple valid FQDNs can be passed as a ";" delimited list.

eap

array of string

The allowed EAP method to be used when authenticating to the network with 802.1x. Valid methods are: "leap", "md5", "tls", "peap", "ttls", "pwd", and "fast". Each method requires different configuration using the properties of this setting; refer to wpa_supplicant documentation for the allowed combinations.

identity

string

Identity string for EAP authentication methods. Often the user's user or login name.

openssl-ciphers

string

Define openssl_ciphers for wpa_supplicant. Openssl sometimes moves ciphers among SECLEVELs, thus compiled-in default value in wpa_supplicant (as modified by some linux distributions) sometimes prevents to connect to old servers that do not support new protocols.

optional

boolean

FALSE

Whether the 802.1X authentication is optional. If TRUE, the activation will continue even after a timeout or an authentication failure. Setting the property to TRUE is currently allowed only for Ethernet connections. If set to FALSE, the activation can continue only after a successful authentication.

pac-file

string

UTF-8 encoded file path containing PAC for EAP-FAST.

password

string

UTF-8 encoded password used for EAP authentication methods. If both the "password" property and the "password-raw" property are specified, "password" is preferred.

password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "password" property.

password-raw

byte array

Password used for EAP authentication methods, given as a byte array to allow passwords in other encodings than UTF-8 to be used. If both the "password" property and the "password-raw" property are specified, "password" is preferred.

password-raw-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "password-raw" property.

phase1-auth-flags

uint32

0

Specifies authentication flags to use in "phase 1" outer authentication using NMSetting8021xAuthFlags options. The individual TLS versions can be explicitly disabled. TLS time checks can be also disabled. If a certain TLS disable flag is not set, it is up to the supplicant to allow or forbid it. The TLS options map to tls_disable_tlsv1_x and tls_disable_time_checks settings. See the wpa_supplicant documentation for more details.

phase1-fast-provisioning

string

Enables or disables in-line provisioning of EAP-FAST credentials when FAST is specified as the EAP method in the "eap" property. Recognized values are "0" (disabled), "1" (allow unauthenticated provisioning), "2" (allow authenticated provisioning), and "3" (allow both authenticated and unauthenticated provisioning). See the wpa_supplicant documentation for more details.

phase1-peaplabel

string

Forces use of the new PEAP label during key derivation. Some RADIUS servers may require forcing the new PEAP label to interoperate with PEAPv1. Set to "1" to force use of the new PEAP label. See the wpa_supplicant documentation for more details.

phase1-peapver

string

Forces which PEAP version is used when PEAP is set as the EAP method in the "eap" property. When unset, the version reported by the server will be used. Sometimes when using older RADIUS servers, it is necessary to force the client to use a particular PEAP version. To do so, this property may be set to "0" or "1" to force that specific PEAP version.

phase2-altsubject-matches

array of string

List of strings to be matched against the altSubjectName of the certificate presented by the authentication server during the inner "phase 2" authentication. If the list is empty, no verification of the server certificate's altSubjectName is performed.

phase2-auth

string

Specifies the allowed "phase 2" inner authentication method when an EAP method that uses an inner TLS tunnel is specified in the "eap" property. For TTLS this property selects one of the supported non-EAP inner methods: "pap", "chap", "mschap", "mschapv2" while "phase2-autheap" selects an EAP inner method. For PEAP this selects an inner EAP method, one of: "gtc", "otp", "md5" and "tls". Each "phase 2" inner method requires specific parameters for successful authentication; see the wpa_supplicant documentation for more details. Both "phase2-auth" and "phase2-autheap" cannot be specified.

phase2-autheap

string

Specifies the allowed "phase 2" inner EAP-based authentication method when TTLS is specified in the "eap" property. Recognized EAP-based "phase 2" methods are "md5", "mschapv2", "otp", "gtc", and "tls". Each "phase 2" inner method requires specific parameters for successful authentication; see the wpa_supplicant documentation for more details.

phase2-ca-cert

byte array

Contains the "phase 2" CA certificate if used by the EAP method specified in the "phase2-auth" or "phase2-autheap" properties. Certificate data is specified using a "scheme"; three are currently supported: blob, path and pkcs#11 URL. When using the blob scheme this property should be set to the certificate's DER encoded data. When using the path scheme, this property should be set to the full UTF-8 encoded path of the certificate, prefixed with the string "file://" and ending with a terminating NUL byte. This property can be unset even if the EAP method supports CA certificates, but this allows man-in-the-middle attacks and is NOT recommended. Note that enabling NMSetting8021x:system-ca-certs will override this setting to use the built-in path, if the built-in path is not a directory.

phase2-ca-cert-password

string

The password used to access the "phase2" CA certificate stored in "phase2-ca-cert" property. Only makes sense if the certificate is stored on a PKCS#11 token that requires a login.

phase2-ca-cert-password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "phase2-ca-cert-password" property.

phase2-ca-path

string

UTF-8 encoded path to a directory containing PEM or DER formatted certificates to be added to the verification chain in addition to the certificate specified in the "phase2-ca-cert" property. If NMSetting8021x:system-ca-certs is enabled and the built-in CA path is an existing directory, then this setting is ignored.

phase2-client-cert

byte array

Contains the "phase 2" client certificate if used by the EAP method specified in the "phase2-auth" or "phase2-autheap" properties. Certificate data is specified using a "scheme"; two are currently supported: blob and path. When using the blob scheme (which is backwards compatible with NM 0.7.x) this property should be set to the certificate's DER encoded data. When using the path scheme, this property should be set to the full UTF-8 encoded path of the certificate, prefixed with the string "file://" and ending with a terminating NUL byte. This property can be unset even if the EAP method supports CA certificates, but this allows man-in-the-middle attacks and is NOT recommended.

phase2-client-cert-password

string

The password used to access the "phase2" client certificate stored in "phase2-client-cert" property. Only makes sense if the certificate is stored on a PKCS#11 token that requires a login.

phase2-client-cert-password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "phase2-client-cert-password" property.

phase2-domain-match

string

Constraint for server domain name. If set, this list of FQDNs is used as a match requirement for dNSName element(s) of the certificate presented by the authentication server during the inner "phase 2" authentication. If a matching dNSName is found, this constraint is met. If no dNSName values are present, this constraint is matched against SubjectName CN using the same comparison. Multiple valid FQDNs can be passed as a ";" delimited list.

phase2-domain-suffix-match

string

Constraint for server domain name. If set, this FQDN is used as a suffix match requirement for dNSName element(s) of the certificate presented by the authentication server during the inner "phase 2" authentication. If a matching dNSName is found, this constraint is met. If no dNSName values are present, this constraint is matched against SubjectName CN using same suffix match comparison. Since version 1.24, multiple valid FQDNs can be passed as a ";" delimited list.

phase2-private-key

byte array

Contains the "phase 2" inner private key when the "phase2-auth" or "phase2-autheap" property is set to "tls". Key data is specified using a "scheme"; two are currently supported: blob and path. When using the blob scheme and private keys, this property should be set to the key's encrypted PEM encoded data. When using private keys with the path scheme, this property should be set to the full UTF-8 encoded path of the key, prefixed with the string "file://" and ending with a terminating NUL byte. When using PKCS#12 format private keys and the blob scheme, this property should be set to the PKCS#12 data and the "phase2-private-key-password" property must be set to password used to decrypt the PKCS#12 certificate and key. When using PKCS#12 files and the path scheme, this property should be set to the full UTF-8 encoded path of the key, prefixed with the string "file://" and ending with a terminating NUL byte, and as with the blob scheme the "phase2-private-key-password" property must be set to the password used to decode the PKCS#12 private key and certificate.

phase2-private-key-password

string

The password used to decrypt the "phase 2" private key specified in the "phase2-private-key" property when the private key either uses the path scheme, or is a PKCS#12 format key.

phase2-private-key-password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "phase2-private-key-password" property.

phase2-subject-match

string

Substring to be matched against the subject of the certificate presented by the authentication server during the inner "phase 2" authentication. When unset, no verification of the authentication server certificate's subject is performed. This property provides little security, if any, and should not be used. This property is deprecated since version 1.2.Use "phase2-domain-suffix-match" instead.

pin

string

PIN used for EAP authentication methods.

pin-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "pin" property.

private-key

byte array

Contains the private key when the "eap" property is set to "tls". Key data is specified using a "scheme"; two are currently supported: blob and path. When using the blob scheme and private keys, this property should be set to the key's encrypted PEM encoded data. When using private keys with the path scheme, this property should be set to the full UTF-8 encoded path of the key, prefixed with the string "file://" and ending with a terminating NUL byte. When using PKCS#12 format private keys and the blob scheme, this property should be set to the PKCS#12 data and the "private-key-password" property must be set to password used to decrypt the PKCS#12 certificate and key. When using PKCS#12 files and the path scheme, this property should be set to the full UTF-8 encoded path of the key, prefixed with the string "file://" and ending with a terminating NUL byte, and as with the blob scheme the "private-key-password" property must be set to the password used to decode the PKCS#12 private key and certificate. WARNING: "private-key" is not a "secret" property, and thus unencrypted private key data using the BLOB scheme may be readable by unprivileged users. Private keys should always be encrypted with a private key password to prevent unauthorized access to unencrypted private key data.

private-key-password

string

The password used to decrypt the private key specified in the "private-key" property when the private key either uses the path scheme, or if the private key is a PKCS#12 format key.

private-key-password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "private-key-password" property.

subject-match

string

Substring to be matched against the subject of the certificate presented by the authentication server. When unset, no verification of the authentication server certificate's subject is performed. This property provides little security, if any, and should not be used. This property is deprecated since version 1.2.Use "phase2-domain-suffix-match" instead.

system-ca-certs

boolean

FALSE

When TRUE, overrides the "ca-path" and "phase2-ca-path" properties using the system CA directory specified at configure time with the --system-ca-path switch. The certificates in this directory are added to the verification chain in addition to any certificates specified by the "ca-cert" and "phase2-ca-cert" properties. If the path provided with --system-ca-path is rather a file name (bundle of trusted CA certificates), it overrides "ca-cert" and "phase2-ca-cert" properties instead (sets ca_cert/ca_cert2 options for wpa_supplicant).

### adsl setting
ADSL Settings.

Key Name

Value Type

Default Value

Value Description

encapsulation

string

Encapsulation of ADSL connection. Can be "vcmux" or "llc".

password

string

Password used to authenticate with the ADSL service.

password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "password" property.

protocol

string

ADSL connection protocol. Can be "pppoa", "pppoe" or "ipoatm".

username

string

Username used to authenticate with the ADSL service.

vci

uint32

0

VCI of ADSL connection

vpi

uint32

0

VPI of ADSL connection

### bluetooth setting
Bluetooth Settings.

Key Name

Value Type

Default Value

Value Description

bdaddr

byte array

The Bluetooth address of the device.

type

string

Either "dun" for Dial-Up Networking connections or "panu" for Personal Area Networking connections to devices supporting the NAP profile.

### bond setting
Bonding Settings.

Key Name

Value Type

Default Value

Value Description

interface-name

string

Deprecated in favor of connection.interface-name, but can be used for backward-compatibility with older daemons, to set the bond's interface name.

options

dict of string to string

{'mode': 'balance-rr'}

Dictionary of key/value pairs of bonding options. Both keys and values must be strings. Option names must contain only alphanumeric characters (ie, [a-zA-Z0-9]).

### bridge setting
Bridging Settings.

Key Name

Value Type

Default Value

Value Description

ageing-time

uint32

300

The Ethernet MAC address aging time, in seconds.

forward-delay

uint32

15

The Spanning Tree Protocol (STP) forwarding delay, in seconds.

group-address

byte array

If specified, The MAC address of the multicast group this bridge uses for STP. The address must be a link-local address in standard Ethernet MAC address format, ie an address of the form 01:80:C2:00:00:0X, with X in [0, 4..F]. If not specified the default value is 01:80:C2:00:00:00.

group-forward-mask

uint32

0

A mask of group addresses to forward. Usually, group addresses in the range from 01:80:C2:00:00:00 to 01:80:C2:00:00:0F are not forwarded according to standards. This property is a mask of 16 bits, each corresponding to a group address in that range that must be forwarded. The mask can't have bits 0, 1 or 2 set because they are used for STP, MAC pause frames and LACP.

hello-time

uint32

2

The Spanning Tree Protocol (STP) hello time, in seconds.

interface-name

string

Deprecated in favor of connection.interface-name, but can be used for backward-compatibility with older daemons, to set the bridge's interface name.

mac-address

byte array

If specified, the MAC address of bridge. When creating a new bridge, this MAC address will be set. If this field is left unspecified, the "ethernet.cloned-mac-address" is referred instead to generate the initial MAC address. Note that setting "ethernet.cloned-mac-address" anyway overwrites the MAC address of the bridge later while activating the bridge. This property is deprecated since version 1.12.Use the "cloned-mac-address" property instead.

max-age

uint32

20

The Spanning Tree Protocol (STP) maximum message age, in seconds.

multicast-hash-max

uint32

4096

Set maximum size of multicast hash table (value must be a power of 2).

multicast-last-member-count

uint32

2

Set the number of queries the bridge will send before stopping forwarding a multicast group after a "leave" message has been received.

multicast-last-member-interval

uint64

100

Set interval (in deciseconds) between queries to find remaining members of a group, after a "leave" message is received.

multicast-membership-interval

uint64

26000

Set delay (in deciseconds) after which the bridge will leave a group, if no membership reports for this group are received.

multicast-querier

boolean

FALSE

Enable or disable sending of multicast queries by the bridge. If not specified the option is disabled.

multicast-querier-interval

uint64

25500

If no queries are seen after this delay (in deciseconds) has passed, the bridge will start to send its own queries.

multicast-query-interval

uint64

12500

Interval (in deciseconds) between queries sent by the bridge after the end of the startup phase.

multicast-query-response-interval

uint64

1000

Set the Max Response Time/Max Response Delay (in deciseconds) for IGMP/MLD queries sent by the bridge.

multicast-query-use-ifaddr

boolean

FALSE

If enabled the bridge's own IP address is used as the source address for IGMP queries otherwise the default of 0.0.0.0 is used.

multicast-router

string

Sets bridge's multicast router. Multicast-snooping must be enabled for this option to work. Supported values are: 'auto', 'disabled', 'enabled' to which kernel assigns the numbers 1, 0, and 2, respectively. If not specified the default value is 'auto' (1).

multicast-snooping

boolean

TRUE

Controls whether IGMP snooping is enabled for this bridge. Note that if snooping was automatically disabled due to hash collisions, the system may refuse to enable the feature until the collisions are resolved.

multicast-startup-query-count

uint32

2

Set the number of IGMP queries to send during startup phase.

multicast-startup-query-interval

uint64

3125

Sets the time (in deciseconds) between queries sent out at startup to determine membership information.

priority

uint32

32768

Sets the Spanning Tree Protocol (STP) priority for this bridge. Lower values are "better"; the lowest priority bridge will be elected the root bridge.

stp

boolean

TRUE

Controls whether Spanning Tree Protocol (STP) is enabled for this bridge.

vlan-default-pvid

uint32

1

The default PVID for the ports of the bridge, that is the VLAN id assigned to incoming untagged frames.

vlan-filtering

boolean

FALSE

Control whether VLAN filtering is enabled on the bridge.

vlan-protocol

string

If specified, the protocol used for VLAN filtering. Supported values are: '802.1Q', '802.1ad'. If not specified the default value is '802.1Q'.

vlan-stats-enabled

boolean

FALSE

Controls whether per-VLAN stats accounting is enabled.

vlans

array of vardict

Array of bridge VLAN objects. In addition to the VLANs specified here, the bridge will also have the default-pvid VLAN configured by the bridge.vlan-default-pvid property. In nmcli the VLAN list can be specified with the following syntax: $vid [pvid] [untagged] [, $vid [pvid] [untagged]]... where $vid is either a single id between 1 and 4094 or a range, represented as a couple of ids separated by a dash.

### bridge-port setting
Bridge Port Settings.

Key Name

Value Type

Default Value

Value Description

hairpin-mode

boolean

FALSE

Enables or disables "hairpin mode" for the port, which allows frames to be sent back out through the port the frame was received on.

path-cost

uint32

100

The Spanning Tree Protocol (STP) port cost for destinations via this port.

priority

uint32

32

The Spanning Tree Protocol (STP) priority of this bridge port.

vlans

array of vardict

Array of bridge VLAN objects. In addition to the VLANs specified here, the port will also have the default-pvid VLAN configured on the bridge by the bridge.vlan-default-pvid property. In nmcli the VLAN list can be specified with the following syntax: $vid [pvid] [untagged] [, $vid [pvid] [untagged]]... where $vid is either a single id between 1 and 4094 or a range, represented as a couple of ids separated by a dash.

### cdma setting
CDMA-based Mobile Broadband Settings.

Key Name

Value Type

Default Value

Value Description

mtu

uint32

0

If non-zero, only transmit packets of the specified size or smaller, breaking larger packets up into multiple frames.

number

string

The number to dial to establish the connection to the CDMA-based mobile broadband network, if any. If not specified, the default number (#777) is used when required.

password

string

The password used to authenticate with the network, if required. Many providers do not require a password, or accept any password. But if a password is required, it is specified here.

password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "password" property.

username

string

The username used to authenticate with the network, if required. Many providers do not require a username, or accept any username. But if a username is required, it is specified here.

### dcb setting
Data Center Bridging Settings.

Key Name

Value Type

Default Value

Value Description

app-fcoe-flags

NMSettingDcbFlags (uint32)

Specifies the NMSettingDcbFlags for the DCB FCoE application. Flags may be any combination of 0x1 (enable), 0x2 (advertise), and 0x4 (willing).

app-fcoe-mode

string

The FCoE controller mode; either "fabric" or "vn2vn". Since 1.34, NULL is the default and means "fabric". Before 1.34, NULL was rejected as invalid and the default was "fabric".

app-fcoe-priority

int32

-1

The highest User Priority (0 - 7) which FCoE frames should use, or -1 for default priority. Only used when the "app-fcoe-flags" property includes the 0x1 (enable) flag.

app-fip-flags

NMSettingDcbFlags (uint32)

Specifies the NMSettingDcbFlags for the DCB FIP application. Flags may be any combination of 0x1 (enable), 0x2 (advertise), and 0x4 (willing).

app-fip-priority

int32

-1

The highest User Priority (0 - 7) which FIP frames should use, or -1 for default priority. Only used when the "app-fip-flags" property includes the 0x1 (enable) flag.

app-iscsi-flags

NMSettingDcbFlags (uint32)

Specifies the NMSettingDcbFlags for the DCB iSCSI application. Flags may be any combination of 0x1 (enable), 0x2 (advertise), and 0x4 (willing).

app-iscsi-priority

int32

-1

The highest User Priority (0 - 7) which iSCSI frames should use, or -1 for default priority. Only used when the "app-iscsi-flags" property includes the 0x1 (enable) flag.

priority-bandwidth

array of uint32

An array of 8 uint values, where the array index corresponds to the User Priority (0 - 7) and the value indicates the percentage of bandwidth of the priority's assigned group that the priority may use. The sum of all percentages for priorities which belong to the same group must total 100 percents.

priority-flow-control

array of uint32

An array of 8 boolean values, where the array index corresponds to the User Priority (0 - 7) and the value indicates whether or not the corresponding priority should transmit priority pause.

priority-flow-control-flags

NMSettingDcbFlags (uint32)

Specifies the NMSettingDcbFlags for DCB Priority Flow Control (PFC). Flags may be any combination of 0x1 (enable), 0x2 (advertise), and 0x4 (willing).

priority-group-bandwidth

array of uint32

An array of 8 uint values, where the array index corresponds to the Priority Group ID (0 - 7) and the value indicates the percentage of link bandwidth allocated to that group. Allowed values are 0 - 100, and the sum of all values must total 100 percents.

priority-group-flags

NMSettingDcbFlags (uint32)

Specifies the NMSettingDcbFlags for DCB Priority Groups. Flags may be any combination of 0x1 (enable), 0x2 (advertise), and 0x4 (willing).

priority-group-id

array of uint32

An array of 8 uint values, where the array index corresponds to the User Priority (0 - 7) and the value indicates the Priority Group ID. Allowed Priority Group ID values are 0 - 7 or 15 for the unrestricted group.

priority-strict-bandwidth

array of uint32

An array of 8 boolean values, where the array index corresponds to the User Priority (0 - 7) and the value indicates whether or not the priority may use all of the bandwidth allocated to its assigned group.

priority-traffic-class

array of uint32

An array of 8 uint values, where the array index corresponds to the User Priority (0 - 7) and the value indicates the traffic class (0 - 7) to which the priority is mapped.

### dummy setting
Dummy Link Settings.

Key Name

Value Type

Default Value

Value Description

### ethtool setting
Ethtool Ethernet Settings.

Key Name

Value Type

Default Value

Value Description

### generic setting
Generic Link Settings.

Key Name

Value Type

Default Value

Value Description

device-handler

string

Name of the device handler that will be invoked to add and delete the device for this connection. The name can only contain ASCII alphanumeric characters and '-', '_', '.'. It cannot start with '.'. See the NetworkManager-dispatcher(8) man page for more details about how to write the device handler. By setting this property the generic connection becomes "virtual", meaning that it can be activated without an existing device; the device will be created at the time the connection is started by invoking the device-handler.

### gsm setting
GSM-based Mobile Broadband Settings.

Key Name

Value Type

Default Value

Value Description

apn

string

The GPRS Access Point Name specifying the APN used when establishing a data session with the GSM-based network. The APN often determines how the user will be billed for their network usage and whether the user has access to the Internet or just a provider-specific walled-garden, so it is important to use the correct APN for the user's mobile broadband plan. The APN may only be composed of the characters a-z, 0-9, ., and - per GSM 03.60 Section 14.9. If the APN is unset (the default) then it may be detected based on "auto-config" setting. The property can be explicitly set to the empty string to prevent that and use no APN.

auto-config

boolean

FALSE

When TRUE, the settings such as APN, username, or password will default to values that match the network the modem will register to in the Mobile Broadband Provider database.

device-id

string

The device unique identifier (as given by the WWAN management service) which this connection applies to. If given, the connection will only apply to the specified device.

home-only

boolean

FALSE

When TRUE, only connections to the home network will be allowed. Connections to roaming networks will not be made.

initial-eps-bearer-apn

string

For LTE modems, this sets the APN for the initial EPS bearer that is set up when attaching to the network. Setting this parameter implies initial-eps-bearer-configure to be TRUE.

initial-eps-bearer-configure

boolean

FALSE

For LTE modems, this setting determines whether the initial EPS bearer shall be configured when bringing up the connection. It is inferred TRUE if initial-eps-bearer-apn is set.

initial-eps-bearer-noauth

boolean

TRUE

For LTE modems, this sets NOAUTH authentication method for the initial EPS bearer that is set up when attaching to the network. If TRUE, do not require the other side to authenticate itself to the client. If FALSE, require authentication from the remote side. In almost all cases, this should be TRUE.

initial-eps-bearer-password

string

For LTE modems, this sets the password for the initial EPS bearer that is set up when attaching to the network. Setting this parameter implies initial-eps-bearer-configure to be TRUE.

initial-eps-bearer-password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "initial-eps-bearer-password" property.

initial-eps-bearer-refuse-chap

boolean

FALSE

For LTE modems, this disables CHAP authentication method for the initial EPS bearer that is set up when attaching to the network.

initial-eps-bearer-refuse-eap

boolean

FALSE

For LTE modems, this disables EAP authentication method for the initial EPS bearer that is set up when attaching to the network.

initial-eps-bearer-refuse-mschap

boolean

FALSE

For LTE modems, this disables MSCHAP authentication method for the initial EPS bearer that is set up when attaching to the network.

initial-eps-bearer-refuse-mschapv2

boolean

FALSE

For LTE modems, this disables MSCHAPV2 authentication method for the initial EPS bearer that is set up when attaching to the network.

initial-eps-bearer-refuse-pap

boolean

FALSE

For LTE modems, this disables PAP authentication method for the initial EPS bearer that is set up when attaching to the network.

initial-eps-bearer-username

string

For LTE modems, this sets the username for the initial EPS bearer that is set up when attaching to the network. Setting this parameter implies initial-eps-bearer-configure to be TRUE.

mtu

uint32

0

If non-zero, only transmit packets of the specified size or smaller, breaking larger packets up into multiple frames.

network-id

string

The Network ID (GSM LAI format, ie MCC-MNC) to force specific network registration. If the Network ID is specified, NetworkManager will attempt to force the device to register only on the specified network. This can be used to ensure that the device does not roam when direct roaming control of the device is not otherwise possible.

number

string

Legacy setting that used to help establishing PPP data sessions for GSM-based modems. This property is deprecated since version 1.16.User-provided values for this setting are no longer used.

password

string

The password used to authenticate with the network, if required. Many providers do not require a password, or accept any password. But if a password is required, it is specified here.

password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "password" property.

pin

string

If the SIM is locked with a PIN it must be unlocked before any other operations are requested. Specify the PIN here to allow operation of the device.

pin-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "pin" property.

sim-id

string

The SIM card unique identifier (as given by the WWAN management service) which this connection applies to. If given, the connection will apply to any device also allowed by "device-id" which contains a SIM card matching the given identifier.

sim-operator-id

string

A MCC/MNC string like "310260" or "21601" identifying the specific mobile network operator which this connection applies to. If given, the connection will apply to any device also allowed by "device-id" and "sim-id" which contains a SIM card provisioned by the given operator.

username

string

The username used to authenticate with the network, if required. Many providers do not require a username, or accept any username. But if a username is required, it is specified here.

### hsr setting
HSR/PRP Settings.

Key Name

Value Type

Default Value

Value Description

interlink

string

The optional interlink port name of the HSR interface.

multicast-spec

uint32

0

The last byte of supervision address.

port1

string

The port1 interface name of the HSR. This property is mandatory.

port2

string

The port2 interface name of the HSR. This property is mandatory.

protocol-version

int32

-1

Configures the protocol version to be used for the HSR/PRP interface. -1 (default) sets the protocol version to the default version for the protocol. 0 (hsr-2010) sets the protocol version to HSRv0 (IEC 62439-3:2010). 1 (hsr-2012) sets the protocol version to HSRv1 (IEC 62439-3:2012).

prp

boolean

FALSE

The protocol used by the interface, whether it is PRP or HSR.

### infiniband setting
Infiniband Settings.

Key Name

Value Type

Default Value

Value Description

mac-address

byte array

If specified, this connection will only apply to the IPoIB device whose permanent MAC address matches. This property does not change the MAC address of the device (i.e. MAC spoofing).

mtu

uint32

0

If non-zero, only transmit packets of the specified size or smaller, breaking larger packets up into multiple frames.

p-key

int32

-1

The InfiniBand p-key to use for this device. A value of -1 means to use the default p-key (aka "the p-key at index 0"). Otherwise, it is a 16-bit unsigned integer, whose high bit 0x8000 is set if it is a "full membership" p-key. The values 0 and 0x8000 are not allowed. With the p-key set, the interface name is always "$parent.$p_key". Setting "connection.interface-name" to another name is not supported. Note that kernel will internally always set the full membership bit, although the interface name does not reflect that. Usually the user would want to configure a full membership p-key with 0x8000 flag set.

parent

string

The interface name of the parent device of this device. Normally NULL, but if the "p_key" property is set, then you must specify the base device by setting either this property or "mac-address".

transport-mode

string

The IP-over-InfiniBand transport mode. Either "datagram" or "connected".

### ipv4 setting
IPv4 Settings.

Key Name

Value Type

Default Value

Value Description

address-data

array of vardict

Array of IPv4 addresses. Each address dictionary contains at least 'address' and 'prefix' entries, containing the IP address as a string, and the prefix length as a uint32. Additional attributes may also exist on some addresses.

addresses

array of array of uint32

Deprecated in favor of the 'address-data' and 'gateway' properties, but this can be used for backward-compatibility with older daemons. Note that if you send this property the daemon will ignore 'address-data' and 'gateway'. Array of IPv4 address structures. Each IPv4 address structure is composed of 3 32-bit values; the first being the IPv4 address (network byte order), the second the prefix (1 - 32), and last the IPv4 gateway (network byte order). The gateway may be left as 0 if no gateway exists for that subnet.

auto-route-ext-gw

NMTernary (int32)

VPN connections will default to add the route automatically unless this setting is set to FALSE. For other connection types, adding such an automatic route is currently not supported and setting this to TRUE has no effect.

dad-timeout

int32

-1

Maximum timeout in milliseconds used to check for the presence of duplicate IP addresses on the network. If an address conflict is detected, the activation will fail. The property is currently implemented only for IPv4. A zero value means that no duplicate address detection is performed, -1 means the default value (either the value configured globally in NetworkManger.conf or 200ms). A value greater than zero is a timeout in milliseconds. Note that the time intervals are subject to randomization as per RFC 5227 and so the actual duration can be between half and the full time specified in this property.

dhcp-client-id

string

A string sent to the DHCP server to identify the local machine which the DHCP server may use to customize the DHCP lease and options. When the property is a hex string ('aa:bb:cc') it is interpreted as a binary client ID, in which case the first byte is assumed to be the 'type' field as per RFC 2132 section 9.14 and the remaining bytes may be an hardware address (e.g. '01:xx:xx:xx:xx:xx:xx' where 1 is the Ethernet ARP type and the rest is a MAC address). If the property is not a hex string it is considered as a non-hardware-address client ID and the 'type' field is set to 0. The special values "mac" and "perm-mac" are supported, which use the current or permanent MAC address of the device to generate a client identifier with type ethernet (01). Currently, these options only work for ethernet type of links. The special value "ipv6-duid" uses the DUID from "ipv6.dhcp-duid" property as an RFC4361-compliant client identifier. As IAID it uses "ipv4.dhcp-iaid" and falls back to "ipv6.dhcp-iaid" if unset. The special value "duid" generates a RFC4361-compliant client identifier based on "ipv4.dhcp-iaid" and uses a DUID generated by hashing /etc/machine-id. The special value "stable" is supported to generate a type 0 client identifier based on the stable-id (see connection.stable-id) and a per-host key. If you set the stable-id, you may want to include the "${DEVICE}" or "${MAC}" specifier to get a per-device key. The special value "none" prevents any client identifier from being sent. Note that this is normally not recommended. If unset, a globally configured default from NetworkManager.conf is used. If still unset, the default depends on the DHCP plugin. The internal dhcp client will default to "mac" and the dhclient plugin will try to use one from its config file if present, or won't sent any client-id otherwise.

dhcp-dscp

string

Specifies the value for the DSCP field (traffic class) of the IP header. When empty, the global default value is used; if no global default is specified, it is assumed to be "CS0". Allowed values are: "CS0", "CS4" and "CS6". The property is currently valid only for IPv4, and it is supported only by the "internal" DHCP plugin.

dhcp-fqdn

string

If the "dhcp-send-hostname" property is TRUE, then the specified FQDN will be sent to the DHCP server when acquiring a lease. This property and "dhcp-hostname" are mutually exclusive and cannot be set at the same time.

dhcp-hostname

string

If the "dhcp-send-hostname" property is TRUE, then the specified name will be sent to the DHCP server when acquiring a lease. This property and "dhcp-fqdn" are mutually exclusive and cannot be set at the same time.

dhcp-hostname-flags

uint32

0

Flags for the DHCP hostname and FQDN. Currently, this property only includes flags to control the FQDN flags set in the DHCP FQDN option. Supported FQDN flags are 0x1 (fqdn-serv-update), 0x2 (fqdn-encoded) and 0x4 (fqdn-no-update). When no FQDN flag is set and 0x8 (fqdn-clear-flags) is set, the DHCP FQDN option will contain no flag. Otherwise, if no FQDN flag is set and 0x8 (fqdn-clear-flags) is not set, the standard FQDN flags are set in the request: 0x1 (fqdn-serv-update), 0x2 (fqdn-encoded) for IPv4 and 0x1 (fqdn-serv-update) for IPv6. When this property is set to the default value 0x0 (none), a global default is looked up in NetworkManager configuration. If that value is unset or also 0x0 (none), then the standard FQDN flags described above are sent in the DHCP requests.

dhcp-iaid

string

A string containing the "Identity Association Identifier" (IAID) used by the DHCP client. The string can be a 32-bit number (either decimal, hexadecimal or as colon separated hexadecimal numbers). Alternatively it can be set to the special values "mac", "perm-mac", "ifname" or "stable". When set to "mac" (or "perm-mac"), the last 4 bytes of the current (or permanent) MAC address are used as IAID. When set to "ifname", the IAID is computed by hashing the interface name. The special value "stable" can be used to generate an IAID based on the stable-id (see connection.stable-id), a per-host key and the interface name. When the property is unset, the value from global configuration is used; if no global default is set then the IAID is assumed to be "ifname". For DHCPv4, the IAID is only used with "ipv4.dhcp-client-id" values "duid" and "ipv6-duid" to generate the client-id. For DHCPv6, note that at the moment this property is only supported by the "internal" DHCPv6 plugin. The "dhclient" DHCPv6 plugin always derives the IAID from the MAC address. The actually used DHCPv6 IAID for a currently activated interface is exposed in the lease information of the device.

dhcp-ipv6-only-preferred

int32

-1

Controls the "IPv6-Only Preferred" DHCPv4 option (RFC 8925). When set to 1 (yes), the host adds the option to the parameter request list; if the DHCP server sends the option back, the host stops the DHCP client for the time interval specified in the option. Enable this feature if the host supports an IPv6-only mode, i.e. either all applications are IPv6-only capable or there is a form of 464XLAT deployed. When set to -1 (default), the actual value is looked up in the global configuration; if not specified, it defaults to 0 (no). If the connection has IPv6 method set to "disabled", this property does not have effect and the "IPv6-Only Preferred" option is always disabled.

dhcp-reject-servers

array of string

Array of servers from which DHCP offers must be rejected. This property is useful to avoid getting a lease from misconfigured or rogue servers. For DHCPv4, each element must be an IPv4 address, optionally followed by a slash and a prefix length (e.g. "192.168.122.0/24"). This property is currently not implemented for DHCPv6.

dhcp-send-hostname

boolean

TRUE

Since 1.52 this property is deprecated and is only used as fallback value for "dhcp-send-hostname-v2" if it's set to 'default'. This is only done to avoid breaking existing configurations, the new property should be used from now on. This property is deprecated since version 1.52.use the new version of dhcp-send-hostname instead.

dhcp-send-hostname-v2

int32

-1

If TRUE, a hostname is sent to the DHCP server when acquiring a lease. Some DHCP servers use this hostname to update DNS databases, essentially providing a static hostname for the computer. If the "dhcp-hostname" property is NULL and this property is TRUE, the current persistent hostname of the computer is sent. The default value is -1 (default). In this case the global value from NetworkManager configuration is looked up. If it's not set, the value from "dhcp-send-hostname", which defaults to TRUE, is used for backwards compatibility. In the future this will change and, in absence of a global default, it will always fallback to TRUE.

dhcp-send-release

NMTernary (int32)

Whether the DHCP client will send RELEASE message when bringing the connection down. The default value is -1 (default). When the default value is specified, then the global value from NetworkManager configuration is looked up, if not set, it is considered as FALSE.

dhcp-timeout

int32

0

A timeout for a DHCP transaction in seconds. If zero (the default), a globally configured default is used. If still unspecified, a device specific timeout is used (usually 45 seconds). Set to 2147483647 (MAXINT32) for infinity.

dhcp-vendor-class-identifier

string

The Vendor Class Identifier DHCP option (60). Special characters in the data string may be escaped using C-style escapes, nevertheless this property cannot contain nul bytes. If the per-profile value is unspecified (the default), a global connection default gets consulted. If still unspecified, the DHCP option is not sent to the server.

dns

array of uint32

Array of IP addresses of DNS servers (as network-byte-order integers)

dns-data

array of strings

Array of DNS name servers. This replaces the deprecated "dns" property. Each name server can also contain a DoT server name.

dns-options

array of string

Array of DNS options to be added to resolv.conf. NULL means that the options are unset and left at the default. In this case NetworkManager will use default options. This is distinct from an empty list of properties. The following options are directly added to resolv.conf: "attempts", "debug", "edns0", "inet6", "ip6-bytestring", "ip6-dotint", "ndots", "no-aaaa", "no-check-names", "no-ip6-dotint", "no-reload", "no-tld-query", "rotate", "single-request", "single-request-reopen", "timeout", "trust-ad", "use-vc". See the resolv.conf(5) man page for a detailed description of these options. In addition, NetworkManager supports the special options "_no-add-edns0" and "_no-add-trust-ad". They are not added to resolv.conf, and can be used to prevent the automatic addition of options "edns0" and "trust-ad" when using caching DNS plugins (see below). The "trust-ad" setting is only honored if the profile contributes name servers to resolv.conf, and if all contributing profiles have "trust-ad" enabled. When using a caching DNS plugin (dnsmasq or systemd-resolved in NetworkManager.conf) then "edns0" and "trust-ad" are automatically added, unless "_no-add-edns0" and "_no-add-trust-ad" are present.

dns-priority

int32

0

DNS servers priority. The relative priority for DNS servers specified by this setting. A lower numerical value is better (higher priority). Negative values have the special effect of excluding other configurations with a greater numerical priority value; so in presence of at least one negative priority, only DNS servers from connections with the lowest priority value will be used. To avoid all DNS leaks, set the priority of the profile that should be used to the most negative value of all active connections profiles. Zero selects a globally configured default value. If the latter is missing or zero too, it defaults to 50 for VPNs (including WireGuard) and 100 for other connections. Note that the priority is to order DNS settings for multiple active connections. It does not disambiguate multiple DNS servers within the same connection profile. When multiple devices have configurations with the same priority, VPNs will be considered first, then devices with the best (lowest metric) default route and then all other devices. When using dns=default, servers with higher priority will be on top of resolv.conf. To prioritize a given server over another one within the same connection, just specify them in the desired order. Note that commonly the resolver tries name servers in /etc/resolv.conf in the order listed, proceeding with the next server in the list on failure. See for example the "rotate" option of the dns-options setting. If there are any negative DNS priorities, then only name servers from the devices with that lowest priority will be considered. When using a DNS resolver that supports Conditional Forwarding or Split DNS (with dns=dnsmasq or dns=systemd-resolved settings), each connection is used to query domains in its search list. The search domains determine which name servers to ask, and the DNS priority is used to prioritize name servers based on the domain. Queries for domains not present in any search list are routed through connections having the '~.' special wildcard domain, which is added automatically to connections with the default route (or can be added manually). When multiple connections specify the same domain, the one with the best priority (lowest numerical value) wins. If a sub domain is configured on another interface it will be accepted regardless the priority, unless parent domain on the other interface has a negative priority, which causes the sub domain to be shadowed. With Split DNS one can avoid undesired DNS leaks by properly configuring DNS priorities and the search domains, so that only name servers of the desired interface are configured.

dns-search

array of string

List of DNS search domains. Domains starting with a tilde ('~') are considered 'routing' domains and are used only to decide the interface over which a query must be forwarded; they are not used to complete unqualified host names. When using a DNS plugin that supports Conditional Forwarding or Split DNS, then the search domains specify which name servers to query. This makes the behavior different from running with plain /etc/resolv.conf. For more information see also the dns-priority setting. When set on a profile that also enabled DHCP, the DNS search list received automatically (option 119 for DHCPv4 and option 24 for DHCPv6) gets merged with the manual list. This can be prevented by setting "ignore-auto-dns". Note that if no DNS searches are configured, the fallback will be derived from the domain from DHCP (option 15).

forwarding

int32

-1

Whether to configure sysctl interface-specific forwarding. When enabled, the interface will act as a router to forward the packet from one interface to another. When set to -1 (default), the value from global configuration is used; if no global default is defined, 2 (auto) will be used. The "forwarding" property is ignored when "method" is set to "shared", because forwarding is always enabled in this case. The accepted values are: -1 (default): use global default. 0 (no): disabled. 1 (yes): enabled. 2 (auto): enable if any shared connection is active, use kernel default otherwise.

gateway

string

The gateway associated with this configuration. This is only meaningful if addresses are also set on the device. Setting the gateway causes NetworkManager to configure a standard default route with the gateway as next hop. This is ignored if "never-default" is set. An alternative is to configure the default route explicitly with a manual route and /0 as prefix length. Note that the gateway usually conflicts with routing that NetworkManager configures for WireGuard interfaces, so usually it should not be set in that case. See "ip4-auto-default-route".

ignore-auto-dns

boolean

FALSE

When "method" is set to "auto" and this property to TRUE, automatically configured name servers and search domains are ignored and only name servers and search domains specified in the "dns" and "dns-search" properties, if any, are used.

ignore-auto-routes

boolean

FALSE

When "method" is set to "auto" and this property to TRUE, automatically configured routes are ignored and only routes specified in the "routes" property, if any, are used.

link-local

int32

0

Enable and disable the IPv4 link-local configuration independently of the ipv4.method configuration. This allows a link-local address (169.254.x.y/16) to be obtained in addition to other addresses, such as those manually configured or obtained from a DHCP server. When set to "auto", the value is dependent on "ipv4.method". When set to "default", it honors the global connection default, before falling back to "auto". Note that if "ipv4.method" is "disabled", then link local addressing is always disabled too. The default is "default". Since 1.52, when set to "fallback", a link-local address is obtained if no other IPv4 address is set.

may-fail

boolean

TRUE

If TRUE, allow overall network configuration to proceed even if the configuration specified by this property times out. Note that at least one IP configuration must succeed or overall network configuration will still fail. For example, in IPv6-only networks, setting this property to TRUE on the NMSettingIP4Config allows the overall network configuration to succeed if IPv4 configuration fails but IPv6 configuration completes successfully.

method

string

IP configuration method. NMSettingIP4Config and NMSettingIP6Config both support "disabled", "auto", "manual", and "link-local". See the subclass-specific documentation for other values. In general, for the "auto" method, properties such as "dns" and "routes" specify information that is added on to the information returned from automatic configuration. The "ignore-auto-routes" and "ignore-auto-dns" properties modify this behavior. For methods that imply no upstream network, such as "shared" or "link-local", these properties must be empty. For IPv4 method "shared", the IP subnet can be configured by adding one manual IPv4 address or otherwise 10.42.x.0/24 is chosen. Note that the shared method must be configured on the interface which shares the internet to a subnet, not on the uplink which is shared.

never-default

boolean

FALSE

If TRUE, this connection will never be the default connection for this IP type, meaning it will never be assigned the default route by NetworkManager.

replace-local-rule

NMTernary (int32)

Connections will default to keep the autogenerated priority 0 local rule unless this setting is set to TRUE.

required-timeout

int32

-1

The minimum time interval in milliseconds for which dynamic IP configuration should be tried before the connection succeeds. This property is useful for example if both IPv4 and IPv6 are enabled and are allowed to fail. Normally the connection succeeds as soon as one of the two address families completes; by setting a required timeout for e.g. IPv4, one can ensure that even if IP6 succeeds earlier than IPv4, NetworkManager waits some time for IPv4 before the connection becomes active. Note that if "may-fail" is FALSE for the same address family, this property has no effect as NetworkManager needs to wait for the full DHCP timeout. A zero value means that no required timeout is present, -1 means the default value (either configuration ipvx.required-timeout override or zero).

route-data

array of vardict

Array of IPv4 routes. Each route dictionary contains at least 'dest' and 'prefix' entries, containing the destination IP address as a string, and the prefix length as a uint32. Most routes will also have a 'next-hop' entry, containing the next hop IP address as a string. If the route has a 'metric' entry (containing a uint32), that will be used as the metric for the route (otherwise NM will pick a default value appropriate to the device). Additional attributes may also exist on some routes.

route-metric

int64

-1

The default metric for routes that don't explicitly specify a metric. The default value -1 means that the metric is chosen automatically based on the device type. The metric applies to dynamic routes, manual (static) routes that don't have an explicit metric setting, address prefix routes, and the default route. Note that for IPv6, the kernel accepts zero (0) but coerces it to 1024 (user default). Hence, setting this property to zero effectively mean setting it to 1024. For IPv4, zero is a regular value for the metric.

route-table

uint32

0

Enable policy routing (source routing) and set the routing table used when adding routes. This affects all routes, including device-routes, IPv4LL, DHCP, SLAAC, default-routes and static routes. But note that static routes can individually overwrite the setting by explicitly specifying a non-zero routing table. If the table setting is left at zero, it is eligible to be overwritten via global configuration. If the property is zero even after applying the global configuration value, policy routing is disabled for the address family of this connection. Policy routing disabled means that NetworkManager will add all routes to the main table (except static routes that explicitly configure a different table). Additionally, NetworkManager will not delete any extraneous routes from tables except the main table. This is to preserve backward compatibility for users who manage routing tables outside of NetworkManager.

routed-dns

int32

-1

Whether to add routes for DNS servers. When enabled, NetworkManager adds a route for each DNS server that is associated with this connection either statically (defined in the connection profile) or dynamically (for example, retrieved via DHCP). The route guarantees that the DNS server is reached via this interface. When set to -1 (default), the value from global configuration is used; if no global default is defined, this feature is disabled.

routes

array of array of uint32

Deprecated in favor of the 'route-data' property, but this can be used for backward-compatibility with older daemons. Note that if you send this property the daemon will ignore 'route-data'. Array of IPv4 route structures. Each IPv4 route structure is composed of 4 32-bit values; the first being the destination IPv4 network or address (network byte order), the second the destination network or address prefix (1 - 32), the third being the next-hop (network byte order) if any, and the fourth being the route metric. If the metric is 0, NM will choose an appropriate default metric for the device. (There is no way to explicitly specify an actual metric of 0 with this property.)

routing-rules

array of 'a{sv}'

Array of dictionaries for routing rules. Each routing rule supports the following options: action (y), dport-end (q), dport-start (q), family (i), from (s), from-len (y), fwmark (u), fwmask (u), iifname (s), invert (b), ipproto (s), oifname (s), priority (u), sport-end (q), sport-start (q), supress-prefixlength (i), table (u), to (s), tos (y), to-len (y), range-end (u), range-start (u).

shared-dhcp-lease-time

int32

0

This option allows you to specify a custom DHCP lease time for the shared connection method in seconds. The value should be either a number between 120 and 31536000 (one year) If this option is not specified, 3600 (one hour) is used. Special values are 0 for default value of 1 hour and 2147483647 (MAXINT32) for infinite lease time.

shared-dhcp-range

string

This option allows you to specify a custom DHCP range for the shared connection method. The value is expected to be in `<START_ADDRESS>,<END_ADDRESS>` format. The range should be part of network set by ipv4.address option and it should not contain network address or broadcast address. If this option is not specified, the DHCP range will be automatically determined based on the interface address. The range will be selected to be adjacent to the interface address, either before or after it, with the larger possible range being preferred. The range will be adjusted to fill the available address space, except for networks with a prefix length greater than 24, which will be treated as if they have a prefix length of 24.

### ipv6 setting
IPv6 Settings.

Key Name

Value Type

Default Value

Value Description

addr-gen-mode

int32

3

Configure the method for creating the IPv6 interface identifier of addresses for RFC4862 IPv6 Stateless Address Autoconfiguration and IPv6 Link Local. The permitted values are: 0 (eui64), 1 (stable-privacy). 2 (default-or-eui64) or 3 (default). If the property is set to "eui64", the addresses will be generated using the interface token derived from the hardware address. This makes the host part of the address constant, making it possible to track the host's presence when it changes networks. The address changes when the interface hardware is replaced. If a duplicate address is detected, there is no fallback to generate another address. When configured, the "ipv6.token" is used instead of the MAC address to generate addresses for stateless autoconfiguration. If the property is set to "stable-privacy", the interface identifier is generated as specified by RFC7217. This works by hashing a host specific key (see NetworkManager(8) manual), the interface name, the connection's "connection.stable-id" property and the address prefix. This improves privacy by making it harder to use the address to track the host's presence as every prefix and network has a different identifier. Also, the address is stable when the network interface hardware is replaced. The special values "default" and "default-or-eui64" will fallback to the global connection default as documented in the NetworkManager.conf(5) manual. If the global default is not specified, the fallback value is "stable-privacy" or "eui64", respectively. For libnm, the property defaults to "default" since 1.40. Previously it used to default to "stable-privacy". On D-Bus, the absence of an addr-gen-mode setting equals "default". For keyfile plugin, the absence of the setting on disk means "default-or-eui64" so that the property doesn't change on upgrade from older versions. Note that this setting is distinct from the Privacy Extensions as configured by "ip6-privacy" property and it does not affect the temporary addresses configured with this option.

address-data

array of vardict

Array of IPv6 addresses. Each address dictionary contains at least 'address' and 'prefix' entries, containing the IP address as a string, and the prefix length as a uint32. Additional attributes may also exist on some addresses.

addresses

array of legacy IPv6 address struct (a(ayuay))

Deprecated in favor of the 'address-data' and 'gateway' properties, but this can be used for backward-compatibility with older daemons. Note that if you send this property the daemon will ignore 'address-data' and 'gateway'. Array of IPv6 address structures. Each IPv6 address structure is composed of an IPv6 address, a prefix length (0 - 128), and an IPv6 gateway address. The gateway may be zeroed out if no gateway exists for that subnet.

auto-route-ext-gw

NMTernary (int32)

VPN connections will default to add the route automatically unless this setting is set to FALSE. For other connection types, adding such an automatic route is currently not supported and setting this to TRUE has no effect.

dad-timeout

int32

-1

Maximum timeout in milliseconds used to check for the presence of duplicate IP addresses on the network. If an address conflict is detected, the activation will fail. The property is currently implemented only for IPv4. A zero value means that no duplicate address detection is performed, -1 means the default value (either the value configured globally in NetworkManger.conf or 200ms). A value greater than zero is a timeout in milliseconds. Note that the time intervals are subject to randomization as per RFC 5227 and so the actual duration can be between half and the full time specified in this property.

dhcp-dscp

string

Specifies the value for the DSCP field (traffic class) of the IP header. When empty, the global default value is used; if no global default is specified, it is assumed to be "CS0". Allowed values are: "CS0", "CS4" and "CS6". The property is currently valid only for IPv4, and it is supported only by the "internal" DHCP plugin.

dhcp-duid

string

A string containing the DHCPv6 Unique Identifier (DUID) used by the dhcp client to identify itself to DHCPv6 servers (RFC 3315). The DUID is carried in the Client Identifier option. If the property is a hex string ('aa:bb:cc') it is interpreted as a binary DUID and filled as an opaque value in the Client Identifier option. The special value "lease" will retrieve the DUID previously used from the lease file belonging to the connection. If no DUID is found and "dhclient" is the configured dhcp client, the DUID is searched in the system-wide dhclient lease file. If still no DUID is found, or another dhcp client is used, a global and permanent DUID-UUID (RFC 6355) will be generated based on the machine-id. The special values "llt" and "ll" will generate a DUID of type LLT or LL (see RFC 3315) based on the current MAC address of the device. In order to try providing a stable DUID-LLT, the time field will contain a constant timestamp that is used globally (for all profiles) and persisted to disk. The special values "stable-llt", "stable-ll" and "stable-uuid" will generate a DUID of the corresponding type, derived from the connection's stable-id and a per-host unique key. You may want to include the "${DEVICE}" or "${MAC}" specifier in the stable-id, in case this profile gets activated on multiple devices. So, the link-layer address of "stable-ll" and "stable-llt" will be a generated address derived from the stable id. The DUID-LLT time value in the "stable-llt" option will be picked among a static timespan of three years (the upper bound of the interval is the same constant timestamp used in "llt"). When the property is unset, the global value provided for "ipv6.dhcp-duid" is used. If no global value is provided, the default "lease" value is assumed.

dhcp-hostname

string

If the "dhcp-send-hostname" property is TRUE, then the specified name will be sent to the DHCP server when acquiring a lease. This property and "dhcp-fqdn" are mutually exclusive and cannot be set at the same time.

dhcp-hostname-flags

uint32

0

Flags for the DHCP hostname and FQDN. Currently, this property only includes flags to control the FQDN flags set in the DHCP FQDN option. Supported FQDN flags are 0x1 (fqdn-serv-update), 0x2 (fqdn-encoded) and 0x4 (fqdn-no-update). When no FQDN flag is set and 0x8 (fqdn-clear-flags) is set, the DHCP FQDN option will contain no flag. Otherwise, if no FQDN flag is set and 0x8 (fqdn-clear-flags) is not set, the standard FQDN flags are set in the request: 0x1 (fqdn-serv-update), 0x2 (fqdn-encoded) for IPv4 and 0x1 (fqdn-serv-update) for IPv6. When this property is set to the default value 0x0 (none), a global default is looked up in NetworkManager configuration. If that value is unset or also 0x0 (none), then the standard FQDN flags described above are sent in the DHCP requests.

dhcp-iaid

string

A string containing the "Identity Association Identifier" (IAID) used by the DHCP client. The string can be a 32-bit number (either decimal, hexadecimal or as colon separated hexadecimal numbers). Alternatively it can be set to the special values "mac", "perm-mac", "ifname" or "stable". When set to "mac" (or "perm-mac"), the last 4 bytes of the current (or permanent) MAC address are used as IAID. When set to "ifname", the IAID is computed by hashing the interface name. The special value "stable" can be used to generate an IAID based on the stable-id (see connection.stable-id), a per-host key and the interface name. When the property is unset, the value from global configuration is used; if no global default is set then the IAID is assumed to be "ifname". For DHCPv4, the IAID is only used with "ipv4.dhcp-client-id" values "duid" and "ipv6-duid" to generate the client-id. For DHCPv6, note that at the moment this property is only supported by the "internal" DHCPv6 plugin. The "dhclient" DHCPv6 plugin always derives the IAID from the MAC address. The actually used DHCPv6 IAID for a currently activated interface is exposed in the lease information of the device.

dhcp-pd-hint

string

A IPv6 address followed by a slash and a prefix length. If set, the value is sent to the DHCPv6 server as hint indicating the prefix delegation (IA_PD) we want to receive. To only hint a prefix length without prefix, set the address part to the zero address (for example "::/60").

dhcp-reject-servers

array of string

Array of servers from which DHCP offers must be rejected. This property is useful to avoid getting a lease from misconfigured or rogue servers. For DHCPv4, each element must be an IPv4 address, optionally followed by a slash and a prefix length (e.g. "192.168.122.0/24"). This property is currently not implemented for DHCPv6.

dhcp-send-hostname

boolean

TRUE

Since 1.52 this property is deprecated and is only used as fallback value for "dhcp-send-hostname-v2" if it's set to 'default'. This is only done to avoid breaking existing configurations, the new property should be used from now on. This property is deprecated since version 1.52.use the new version of dhcp-send-hostname instead.

dhcp-send-hostname-v2

int32

-1

If TRUE, a hostname is sent to the DHCP server when acquiring a lease. Some DHCP servers use this hostname to update DNS databases, essentially providing a static hostname for the computer. If the "dhcp-hostname" property is NULL and this property is TRUE, the current persistent hostname of the computer is sent. The default value is -1 (default). In this case the global value from NetworkManager configuration is looked up. If it's not set, the value from "dhcp-send-hostname", which defaults to TRUE, is used for backwards compatibility. In the future this will change and, in absence of a global default, it will always fallback to TRUE.

dhcp-send-release

NMTernary (int32)

Whether the DHCP client will send RELEASE message when bringing the connection down. The default value is -1 (default). When the default value is specified, then the global value from NetworkManager configuration is looked up, if not set, it is considered as FALSE.

dhcp-timeout

int32

0

A timeout for a DHCP transaction in seconds. If zero (the default), a globally configured default is used. If still unspecified, a device specific timeout is used (usually 45 seconds). Set to 2147483647 (MAXINT32) for infinity.

dns

array of byte array

Array of IP addresses of DNS servers (in network byte order)

dns-data

array of strings

Array of DNS name servers. This replaces the deprecated "dns" property. Each name server can also contain a DoT server name.

dns-options

array of string

Array of DNS options to be added to resolv.conf. NULL means that the options are unset and left at the default. In this case NetworkManager will use default options. This is distinct from an empty list of properties. The following options are directly added to resolv.conf: "attempts", "debug", "edns0", "inet6", "ip6-bytestring", "ip6-dotint", "ndots", "no-aaaa", "no-check-names", "no-ip6-dotint", "no-reload", "no-tld-query", "rotate", "single-request", "single-request-reopen", "timeout", "trust-ad", "use-vc". See the resolv.conf(5) man page for a detailed description of these options. In addition, NetworkManager supports the special options "_no-add-edns0" and "_no-add-trust-ad". They are not added to resolv.conf, and can be used to prevent the automatic addition of options "edns0" and "trust-ad" when using caching DNS plugins (see below). The "trust-ad" setting is only honored if the profile contributes name servers to resolv.conf, and if all contributing profiles have "trust-ad" enabled. When using a caching DNS plugin (dnsmasq or systemd-resolved in NetworkManager.conf) then "edns0" and "trust-ad" are automatically added, unless "_no-add-edns0" and "_no-add-trust-ad" are present.

dns-priority

int32

0

DNS servers priority. The relative priority for DNS servers specified by this setting. A lower numerical value is better (higher priority). Negative values have the special effect of excluding other configurations with a greater numerical priority value; so in presence of at least one negative priority, only DNS servers from connections with the lowest priority value will be used. To avoid all DNS leaks, set the priority of the profile that should be used to the most negative value of all active connections profiles. Zero selects a globally configured default value. If the latter is missing or zero too, it defaults to 50 for VPNs (including WireGuard) and 100 for other connections. Note that the priority is to order DNS settings for multiple active connections. It does not disambiguate multiple DNS servers within the same connection profile. When multiple devices have configurations with the same priority, VPNs will be considered first, then devices with the best (lowest metric) default route and then all other devices. When using dns=default, servers with higher priority will be on top of resolv.conf. To prioritize a given server over another one within the same connection, just specify them in the desired order. Note that commonly the resolver tries name servers in /etc/resolv.conf in the order listed, proceeding with the next server in the list on failure. See for example the "rotate" option of the dns-options setting. If there are any negative DNS priorities, then only name servers from the devices with that lowest priority will be considered. When using a DNS resolver that supports Conditional Forwarding or Split DNS (with dns=dnsmasq or dns=systemd-resolved settings), each connection is used to query domains in its search list. The search domains determine which name servers to ask, and the DNS priority is used to prioritize name servers based on the domain. Queries for domains not present in any search list are routed through connections having the '~.' special wildcard domain, which is added automatically to connections with the default route (or can be added manually). When multiple connections specify the same domain, the one with the best priority (lowest numerical value) wins. If a sub domain is configured on another interface it will be accepted regardless the priority, unless parent domain on the other interface has a negative priority, which causes the sub domain to be shadowed. With Split DNS one can avoid undesired DNS leaks by properly configuring DNS priorities and the search domains, so that only name servers of the desired interface are configured.

dns-search

array of string

List of DNS search domains. Domains starting with a tilde ('~') are considered 'routing' domains and are used only to decide the interface over which a query must be forwarded; they are not used to complete unqualified host names. When using a DNS plugin that supports Conditional Forwarding or Split DNS, then the search domains specify which name servers to query. This makes the behavior different from running with plain /etc/resolv.conf. For more information see also the dns-priority setting. When set on a profile that also enabled DHCP, the DNS search list received automatically (option 119 for DHCPv4 and option 24 for DHCPv6) gets merged with the manual list. This can be prevented by setting "ignore-auto-dns". Note that if no DNS searches are configured, the fallback will be derived from the domain from DHCP (option 15).

forwarding

int32

-1

Whether to configure sysctl interface-specific forwarding. When enabled, the interface will act as a router to forward the packet from one interface to another. When set to -1 (default), the value from global configuration is used; if no global default is defined, 2 (auto) will be used. The "forwarding" property is ignored when "method" is set to "shared", because forwarding is always enabled in this case. The accepted values are: -1 (default): use global default. 0 (no): disabled. 1 (yes): enabled. 2 (auto): enable if any shared connection is active, use kernel default otherwise.

gateway

string

The gateway associated with this configuration. This is only meaningful if addresses are also set on the device. Setting the gateway causes NetworkManager to configure a standard default route with the gateway as next hop. This is ignored if "never-default" is set. An alternative is to configure the default route explicitly with a manual route and /0 as prefix length. Note that the gateway usually conflicts with routing that NetworkManager configures for WireGuard interfaces, so usually it should not be set in that case. See "ip4-auto-default-route".

ignore-auto-dns

boolean

FALSE

When "method" is set to "auto" and this property to TRUE, automatically configured name servers and search domains are ignored and only name servers and search domains specified in the "dns" and "dns-search" properties, if any, are used.

ignore-auto-routes

boolean

FALSE

When "method" is set to "auto" and this property to TRUE, automatically configured routes are ignored and only routes specified in the "routes" property, if any, are used.

ip6-privacy

NMSettingIP6ConfigPrivacy (int32)

Configure IPv6 Privacy Extensions for SLAAC, described in RFC4941. If enabled, it makes the kernel generate a temporary IPv6 address in addition to the public one generated from MAC address via modified EUI-64. This enhances privacy, but could cause problems in some applications, on the other hand. The permitted values are: -1: unknown, 0: disabled, 1: enabled (prefer public address), 2: enabled (prefer temporary addresses). Having a per-connection setting set to "-1" (default) means fallback to global configuration "ipv6.ip6-privacy". If it's also unspecified or set to "-1", fallback to read "/proc/sys/net/ipv6/conf/default/use_tempaddr". Note that this setting is distinct from the Stable Privacy addresses that can be enabled with the "addr-gen-mode" property's "stable-privacy" setting as another way of avoiding host tracking with IPv6 addresses.

may-fail

boolean

TRUE

If TRUE, allow overall network configuration to proceed even if the configuration specified by this property times out. Note that at least one IP configuration must succeed or overall network configuration will still fail. For example, in IPv6-only networks, setting this property to TRUE on the NMSettingIP4Config allows the overall network configuration to succeed if IPv4 configuration fails but IPv6 configuration completes successfully.

method

string

IP configuration method. NMSettingIP4Config and NMSettingIP6Config both support "disabled", "auto", "manual", and "link-local". See the subclass-specific documentation for other values. In general, for the "auto" method, properties such as "dns" and "routes" specify information that is added on to the information returned from automatic configuration. The "ignore-auto-routes" and "ignore-auto-dns" properties modify this behavior. For methods that imply no upstream network, such as "shared" or "link-local", these properties must be empty. For IPv4 method "shared", the IP subnet can be configured by adding one manual IPv4 address or otherwise 10.42.x.0/24 is chosen. Note that the shared method must be configured on the interface which shares the internet to a subnet, not on the uplink which is shared.

mtu

uint32

0

Maximum transmission unit size, in bytes. If zero (the default), the MTU is set automatically from router advertisements or is left equal to the link-layer MTU. If greater than the link-layer MTU, or greater than zero but less than the minimum IPv6 MTU of 1280, this value has no effect.

never-default

boolean

FALSE

If TRUE, this connection will never be the default connection for this IP type, meaning it will never be assigned the default route by NetworkManager.

ra-timeout

int32

0

A timeout for waiting Router Advertisements in seconds. If zero (the default), a globally configured default is used. If still unspecified, the timeout depends on the sysctl settings of the device. Set to 2147483647 (MAXINT32) for infinity.

replace-local-rule

NMTernary (int32)

Connections will default to keep the autogenerated priority 0 local rule unless this setting is set to TRUE.

required-timeout

int32

-1

The minimum time interval in milliseconds for which dynamic IP configuration should be tried before the connection succeeds. This property is useful for example if both IPv4 and IPv6 are enabled and are allowed to fail. Normally the connection succeeds as soon as one of the two address families completes; by setting a required timeout for e.g. IPv4, one can ensure that even if IP6 succeeds earlier than IPv4, NetworkManager waits some time for IPv4 before the connection becomes active. Note that if "may-fail" is FALSE for the same address family, this property has no effect as NetworkManager needs to wait for the full DHCP timeout. A zero value means that no required timeout is present, -1 means the default value (either configuration ipvx.required-timeout override or zero).

route-data

array of vardict

Array of IPv6 routes. Each route dictionary contains at least 'dest' and 'prefix' entries, containing the destination IP address as a string, and the prefix length as a uint32. Most routes will also have a 'next-hop' entry, containing the next hop IP address as a string. If the route has a 'metric' entry (containing a uint32), that will be used as the metric for the route (otherwise NM will pick a default value appropriate to the device). Additional attributes may also exist on some routes.

route-metric

int64

-1

The default metric for routes that don't explicitly specify a metric. The default value -1 means that the metric is chosen automatically based on the device type. The metric applies to dynamic routes, manual (static) routes that don't have an explicit metric setting, address prefix routes, and the default route. Note that for IPv6, the kernel accepts zero (0) but coerces it to 1024 (user default). Hence, setting this property to zero effectively mean setting it to 1024. For IPv4, zero is a regular value for the metric.

route-table

uint32

0

Enable policy routing (source routing) and set the routing table used when adding routes. This affects all routes, including device-routes, IPv4LL, DHCP, SLAAC, default-routes and static routes. But note that static routes can individually overwrite the setting by explicitly specifying a non-zero routing table. If the table setting is left at zero, it is eligible to be overwritten via global configuration. If the property is zero even after applying the global configuration value, policy routing is disabled for the address family of this connection. Policy routing disabled means that NetworkManager will add all routes to the main table (except static routes that explicitly configure a different table). Additionally, NetworkManager will not delete any extraneous routes from tables except the main table. This is to preserve backward compatibility for users who manage routing tables outside of NetworkManager.

routed-dns

int32

-1

Whether to add routes for DNS servers. When enabled, NetworkManager adds a route for each DNS server that is associated with this connection either statically (defined in the connection profile) or dynamically (for example, retrieved via DHCP). The route guarantees that the DNS server is reached via this interface. When set to -1 (default), the value from global configuration is used; if no global default is defined, this feature is disabled.

routes

array of legacy IPv6 route struct (a(ayuayu))

Deprecated in favor of the 'route-data' property, but this can be used for backward-compatibility with older daemons. Note that if you send this property the daemon will ignore 'route-data'. Array of IPv6 route structures. Each IPv6 route structure is composed of an IPv6 address, a prefix length (0 - 128), an IPv6 next hop address (which may be zeroed out if there is no next hop), and a metric. If the metric is 0, NM will choose an appropriate default metric for the device.

routing-rules

array of 'a{sv}'

Array of dictionaries for routing rules. Each routing rule supports the following options: action (y), dport-end (q), dport-start (q), family (i), from (s), from-len (y), fwmark (u), fwmask (u), iifname (s), invert (b), ipproto (s), oifname (s), priority (u), sport-end (q), sport-start (q), supress-prefixlength (i), table (u), to (s), tos (y), to-len (y), range-end (u), range-start (u).

shared-dhcp-lease-time

int32

0

This option allows you to specify a custom DHCP lease time for the shared connection method in seconds. The value should be either a number between 120 and 31536000 (one year) If this option is not specified, 3600 (one hour) is used. Special values are 0 for default value of 1 hour and 2147483647 (MAXINT32) for infinite lease time.

shared-dhcp-range

string

This option allows you to specify a custom DHCP range for the shared connection method. The value is expected to be in `<START_ADDRESS>,<END_ADDRESS>` format. The range should be part of network set by ipv4.address option and it should not contain network address or broadcast address. If this option is not specified, the DHCP range will be automatically determined based on the interface address. The range will be selected to be adjacent to the interface address, either before or after it, with the larger possible range being preferred. The range will be adjusted to fill the available address space, except for networks with a prefix length greater than 24, which will be treated as if they have a prefix length of 24.

temp-preferred-lifetime

int32

0

The preferred lifetime of autogenerated temporary addresses, in seconds. Having a per-connection setting set to "0" (default) means fallback to global configuration "ipv6.temp-preferred-lifetime" setting". If it's also unspecified or set to "0", fallback to read "/proc/sys/net/ipv6/conf/default/temp_prefered_lft".

temp-valid-lifetime

int32

0

The valid lifetime of autogenerated temporary addresses, in seconds. Having a per-connection setting set to "0" (default) means fallback to global configuration "ipv6.temp-valid-lifetime" setting". If it's also unspecified or set to "0", fallback to read "/proc/sys/net/ipv6/conf/default/temp_valid_lft".

token

string

Configure the token for draft-chown-6man-tokenised-ipv6-identifiers-02 IPv6 tokenized interface identifiers. Useful with eui64 addr-gen-mode. When set, the token is used as IPv6 interface identifier instead of the hardware address. This only applies to addresses from stateless autoconfiguration, not to IPv6 link local addresses.

### ip-tunnel setting
IP Tunneling Settings.

Key Name

Value Type

Default Value

Value Description

encapsulation-limit

uint32

0

How many additional levels of encapsulation are permitted to be prepended to packets. This property applies only to IPv6 tunnels. To disable this option, add 0x1 (ip6-ign-encap-limit) to ip-tunnel flags.

flags

uint32

0

Tunnel flags. Currently, the following values are supported: 0x1 (ip6-ign-encap-limit), 0x2 (ip6-use-orig-tclass), 0x4 (ip6-use-orig-flowlabel), 0x8 (ip6-mip6-dev), 0x10 (ip6-rcv-dscp-copy), 0x20 (ip6-use-orig-fwmark). They are valid only for IPv6 tunnels.

flow-label

uint32

0

The flow label to assign to tunnel packets. This property applies only to IPv6 tunnels.

fwmark

uint32

0

The fwmark value to assign to tunnel packets. This property can be set to a non zero value only on VTI and VTI6 tunnels.

input-key

string

The key used for tunnel input packets; the property is valid only for certain tunnel modes (GRE, IP6GRE). If empty, no key is used.

local

string

The local endpoint of the tunnel; the value can be empty, otherwise it must contain an IPv4 or IPv6 address.

mode

uint32

0

The tunneling mode. Valid values: 1 (ipip), 2 (gre), 3 (sit), 4 (isatap), 5 (vti), 6 (ip6ip6), 7 (ipip6), 8 (ip6gre), 9 (vti6), 10 (gretap) and 11 (ip6gretap)

mtu

uint32

0

If non-zero, only transmit packets of the specified size or smaller, breaking larger packets up into multiple fragments.

output-key

string

The key used for tunnel output packets; the property is valid only for certain tunnel modes (GRE, IP6GRE). If empty, no key is used.

parent

string

If given, specifies the parent interface name or parent connection UUID the new device will be bound to so that tunneled packets will only be routed via that interface.

path-mtu-discovery

boolean

TRUE

Whether to enable Path MTU Discovery on this tunnel.

remote

string

The remote endpoint of the tunnel; the value must contain an IPv4 or IPv6 address.

tos

uint32

0

The type of service (IPv4) or traffic class (IPv6) field to be set on tunneled packets.

ttl

uint32

0

The TTL to assign to tunneled packets. 0 is a special value meaning that packets inherit the TTL value.

### ipvlan setting
IPVLAN Settings.

Key Name

Value Type

Default Value

Value Description

mode

uint32

0

The IPVLAN mode. Valid values: 1 (l2), 2 (l3) and 3 (l3s).

parent

string

If given, specifies the parent interface name or parent connection UUID from which this IPVLAN interface should be created. If this property is not specified, the connection must contain an "802-3-ethernet" setting with a "mac-address" property.

private

boolean

FALSE

Whether the interface should be put in private mode.

vepa

boolean

FALSE

Whether the interface should be put in VEPA mode.

### macsec setting
MACSec Settings.

Key Name

Value Type

Default Value

Value Description

encrypt

boolean

TRUE

Whether the transmitted traffic must be encrypted.

mka-cak

string

The pre-shared CAK (Connectivity Association Key) for MACsec Key Agreement. Must be a string of 32 hexadecimal characters.

mka-cak-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "mka-cak" property.

mka-ckn

string

The pre-shared CKN (Connectivity-association Key Name) for MACsec Key Agreement. Must be a string of hexadecimal characters with a even length between 2 and 64.

mode

int32

0

Specifies how the CAK (Connectivity Association Key) for MKA (MACsec Key Agreement) is obtained.

offload

int32

-1

Specifies the MACsec offload mode. 0 (off) disables MACsec offload. 1 (phy) and 2 (mac) request offload respectively to the PHY or to the MAC; if the selected mode is not available, the connection will fail. -1 (default) uses the global default value specified in NetworkManager configuration; if no global default is defined, the built-in default is 0 (off).

parent

string

If given, specifies the parent interface name or parent connection UUID from which this MACSEC interface should be created. If this property is not specified, the connection must contain an "802-3-ethernet" setting with a "mac-address" property.

port

int32

1

The port component of the SCI (Secure Channel Identifier), between 1 and 65534.

send-sci

boolean

TRUE

Specifies whether the SCI (Secure Channel Identifier) is included in every packet.

validation

int32

2

Specifies the validation mode for incoming frames.

### macvlan setting
MAC VLAN Settings.

Key Name

Value Type

Default Value

Value Description

mode

uint32

0

The macvlan mode, which specifies the communication mechanism between multiple macvlans on the same lower device.

parent

string

If given, specifies the parent interface name or parent connection UUID from which this MAC-VLAN interface should be created. If this property is not specified, the connection must contain an "802-3-ethernet" setting with a "mac-address" property.

promiscuous

boolean

TRUE

Whether the parent interface should be put in promiscuous mode (true by default).

tap

boolean

FALSE

Whether the interface should be a MACVTAP.

### match setting
Match settings.

Key Name

Value Type

Default Value

Value Description

driver

array of string

A list of driver names to match. Each element is a shell wildcard pattern. See NMSettingMatch:interface-name for how special characters '|', '&', '!' and '\\' are used for optional and mandatory matches and inverting the pattern.

interface-name

array of string

A list of interface names to match. Each element is a shell wildcard pattern. An element can be prefixed with a pipe symbol (|) or an ampersand (&). The former means that the element is optional and the latter means that it is mandatory. If there are any optional elements, than the match evaluates to true if at least one of the optional element matches (logical OR). If there are any mandatory elements, then they all must match (logical AND). By default, an element is optional. This means that an element "foo" behaves the same as "|foo". An element can also be inverted with exclamation mark (!) between the pipe symbol (or the ampersand) and before the pattern. Note that "!foo" is a shortcut for the mandatory match "&!foo". Finally, a backslash can be used at the beginning of the element (after the optional special characters) to escape the start of the pattern. For example, "&\\!a" is an mandatory match for literally "!a".

kernel-command-line

array of string

A list of kernel command line arguments to match. This may be used to check whether a specific kernel command line option is set (or unset, if prefixed with the exclamation mark). The argument must either be a single word, or an assignment (i.e. two words, joined by "="). In the former case the kernel command line is searched for the word appearing as is, or as left hand side of an assignment. In the latter case, the exact assignment is looked for with right and left hand side matching. Wildcard patterns are not supported. See NMSettingMatch:interface-name for how special characters '|', '&', '!' and '\\' are used for optional and mandatory matches and inverting the match.

path

array of string

A list of paths to match against the ID_PATH udev property of devices. ID_PATH represents the topological persistent path of a device. It typically contains a subsystem string (pci, usb, platform, etc.) and a subsystem-specific identifier. For PCI devices the path has the form "pci-$domain:$bus:$device.$function", where each variable is an hexadecimal value; for example "pci-0000:0a:00.0". The path of a device can be obtained with "udevadm info /sys/class/net/$dev | grep ID_PATH=" or by looking at the "path" property exported by NetworkManager ("nmcli -f general.path device show $dev"). Each element of the list is a shell wildcard pattern. See NMSettingMatch:interface-name for how special characters '|', '&', '!' and '\\' are used for optional and mandatory matches and inverting the pattern.

### 802-11-olpc-mesh setting
OLPC Wireless Mesh Settings.

Key Name

Value Type

Default Value

Value Description

channel

uint32

0

Channel on which the mesh network to join is located.

dhcp-anycast-address

byte array

Anycast DHCP MAC address used when requesting an IP address via DHCP. The specific anycast address used determines which DHCP server class answers the request. This is currently only implemented by dhclient DHCP plugin.

ssid

byte array

SSID of the mesh network to join.

### ovs-bridge setting
OvsBridge Link Settings.

Key Name

Value Type

Default Value

Value Description

datapath-type

string

The data path type. One of "system", "netdev" or empty.

fail-mode

string

The bridge failure mode. One of "secure", "standalone" or empty.

mcast-snooping-enable

boolean

FALSE

Enable or disable multicast snooping.

rstp-enable

boolean

FALSE

Enable or disable RSTP.

stp-enable

boolean

FALSE

Enable or disable STP.

### ovs-dpdk setting
OvsDpdk Link Settings.

Key Name

Value Type

Default Value

Value Description

devargs

string

Open vSwitch DPDK device arguments.

lsc-interrupt

int32

-1

Configures the Link State Change (LSC) detection mode for the OVS DPDK interface. When set to -1 (ignore), NetworkManager doesn't change the default value configured by Open vSwitch. 1 (enabled) enables interrupts. 0 (disabled) disables interrupts, thus setting the interface in poll mode.

n-rxq

uint32

0

Open vSwitch DPDK number of rx queues. Defaults to zero which means to leave the parameter in OVS unspecified and effectively configures one queue.

n-rxq-desc

uint32

0

The rx queue size (number of rx descriptors) for DPDK ports. Must be zero or a power of 2 between 1 and 4096, and supported by the hardware. Defaults to zero which means to leave the parameter in OVS unspecified and effectively configures 2048 descriptors.

n-txq-desc

uint32

0

The tx queue size (number of tx descriptors) for DPDK ports. Must be zero or a power of 2 between 1 and 4096, and supported by the hardware. Defaults to zero which means to leave the parameter in OVS unspecified and effectively configures 2048 descriptors.

### ovs-interface setting
Open vSwitch Interface Settings.

Key Name

Value Type

Default Value

Value Description

ofport-request

uint32

0

Open vSwitch openflow port number. Defaults to zero which means that port number will not be specified and it will be chosen randomly by ovs. OpenFlow ports are the network interfaces for passing packets between OpenFlow processing and the rest of the network. OpenFlow switches connect logically to each other via their OpenFlow ports.

type

string

The interface type. Either "internal", "system", "patch", "dpdk", or empty.

### ovs-patch setting
OvsPatch Link Settings.

Key Name

Value Type

Default Value

Value Description

peer

string

Specifies the name of the interface for the other side of the patch. The patch on the other side must also set this interface as peer.

### ovs-port setting
OvsPort Link Settings.

Key Name

Value Type

Default Value

Value Description

bond-downdelay

uint32

0

The time port must be inactive in order to be considered down.

bond-mode

string

Bonding mode. One of "active-backup", "balance-slb", or "balance-tcp".

bond-updelay

uint32

0

The time port must be active before it starts forwarding traffic.

lacp

string

LACP mode. One of "active", "off", or "passive".

tag

uint32

0

The VLAN tag in the range 0-4095.

trunks

array of vardict

A list of VLAN ranges that this port trunks. The property is valid only for ports with mode "trunk", "native-tagged", or "native-untagged port". If it is empty, the port trunks all VLANs.

vlan-mode

string

The VLAN mode. One of "access", "native-tagged", "native-untagged", "trunk", "dot1q-tunnel" or unset.

### ppp setting
Point-to-Point Protocol Settings.

Key Name

Value Type

Default Value

Value Description

baud

uint32

0

If non-zero, instruct pppd to set the serial port to the specified baudrate. This value should normally be left as 0 to automatically choose the speed.

crtscts

boolean

FALSE

If TRUE, specify that pppd should set the serial port to use hardware flow control with RTS and CTS signals. This value should normally be set to FALSE.

lcp-echo-failure

uint32

0

If non-zero, instruct pppd to presume the connection to the peer has failed if the specified number of LCP echo-requests go unanswered by the peer. The "lcp-echo-interval" property must also be set to a non-zero value if this property is used.

lcp-echo-interval

uint32

0

If non-zero, instruct pppd to send an LCP echo-request frame to the peer every n seconds (where n is the specified value). Note that some PPP peers will respond to echo requests and some will not, and it is not possible to autodetect this.

mppe-stateful

boolean

FALSE

If TRUE, stateful MPPE is used. See pppd documentation for more information on stateful MPPE.

mru

uint32

0

If non-zero, instruct pppd to request that the peer send packets no larger than the specified size. If non-zero, the MRU should be between 128 and 16384.

mtu

uint32

0

If non-zero, instruct pppd to send packets no larger than the specified size.

no-vj-comp

boolean

FALSE

If TRUE, Van Jacobsen TCP header compression will not be requested.

noauth

boolean

TRUE

If TRUE, do not require the other side (usually the PPP server) to authenticate itself to the client. If FALSE, require authentication from the remote side. In almost all cases, this should be TRUE.

nobsdcomp

boolean

FALSE

If TRUE, BSD compression will not be requested.

nodeflate

boolean

FALSE

If TRUE, "deflate" compression will not be requested.

refuse-chap

boolean

FALSE

If TRUE, the CHAP authentication method will not be used.

refuse-eap

boolean

FALSE

If TRUE, the EAP authentication method will not be used.

refuse-mschap

boolean

FALSE

If TRUE, the MSCHAP authentication method will not be used.

refuse-mschapv2

boolean

FALSE

If TRUE, the MSCHAPv2 authentication method will not be used.

refuse-pap

boolean

FALSE

If TRUE, the PAP authentication method will not be used.

require-mppe

boolean

FALSE

If TRUE, MPPE (Microsoft Point-to-Point Encryption) will be required for the PPP session. If either 64-bit or 128-bit MPPE is not available the session will fail. Note that MPPE is not used on mobile broadband connections.

require-mppe-128

boolean

FALSE

If TRUE, 128-bit MPPE (Microsoft Point-to-Point Encryption) will be required for the PPP session, and the "require-mppe" property must also be set to TRUE. If 128-bit MPPE is not available the session will fail.

### pppoe setting
PPP-over-Ethernet Settings.

Key Name

Value Type

Default Value

Value Description

parent

string

If given, specifies the parent interface name on which this PPPoE connection should be created. If this property is not specified, the connection is activated on the interface specified in "interface-name" of NMSettingConnection.

password

string

Password used to authenticate with the PPPoE service.

password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "password" property.

service

string

If specified, instruct PPPoE to only initiate sessions with access concentrators that provide the specified service. For most providers, this should be left blank. It is only required if there are multiple access concentrators or a specific service is known to be required.

username

string

Username used to authenticate with the PPPoE service.

### proxy setting
WWW Proxy Settings.

Key Name

Value Type

Default Value

Value Description

browser-only

boolean

FALSE

Whether the proxy configuration is for browser only.

method

int32

0

Method for proxy configuration, Default is 0 (none)

pac-script

string

PAC script for the connection. This is an UTF-8 encoded javascript code that defines a FindProxyForURL() function.

pac-url

string

PAC URL for obtaining PAC file.

### serial setting
Serial Link Settings.

Key Name

Value Type

Default Value

Value Description

baud

uint32

57600

Speed to use for communication over the serial port. Note that this value usually has no effect for mobile broadband modems as they generally ignore speed settings and use the highest available speed.

bits

uint32

8

Byte-width of the serial communication. The 8 in "8n1" for example.

parity

byte

The connection parity: 69 (ASCII 'E') for even parity, 111 (ASCII 'o') for odd, 110 (ASCII 'n') for none.

send-delay

uint64

0

Time to delay between each byte sent to the modem, in microseconds.

stopbits

uint32

1

Number of stop bits for communication on the serial port. Either 1 or 2. The 1 in "8n1" for example.

### sriov setting
SR-IOV settings.

Key Name

Value Type

Default Value

Value Description

autoprobe-drivers

NMTernary (int32)

Whether to autoprobe virtual functions by a compatible driver. If set to 1 (true), the kernel will try to bind VFs to a compatible driver and if this succeeds a new network interface will be instantiated for each VF. If set to 0 (false), VFs will not be claimed and no network interfaces will be created for them. When set to -1 (default), the global default is used; in case the global default is unspecified it is assumed to be 1 (true).

eswitch-encap-mode

int32

-1

Select the eswitch encapsulation support. Currently it's only supported for PCI PF devices, and only if the eswitch device is managed from the same PCI address than the PF. If set to -1 (preserve) (default) the eswitch encap-mode won't be modified by NetworkManager.

eswitch-inline-mode

int32

-1

Select the eswitch inline-mode of the device. Some HWs need the VF driver to put part of the packet headers on the TX descriptor so the e-switch can do proper matching and steering. Currently it's only supported for PCI PF devices, and only if the eswitch device is managed from the same PCI address than the PF. If set to -1 (preserve) (default) the eswitch inline-mode won't be modified by NetworkManager.

eswitch-mode

int32

-1

Select the eswitch mode of the device. Currently it's only supported for PCI PF devices, and only if the eswitch device is managed from the same PCI address than the PF. If set to -1 (preserve) (default) the eswitch mode won't be modified by NetworkManager.

preserve-on-down

int32

-1

This controls whether NetworkManager preserves the SR-IOV parameters set on the device when the connection is deactivated, or whether it resets them to their default value. The SR-IOV parameters are those specified in this setting (the "sriov" setting), like the number of VFs to create, the eswitch configuration, etc. If set to 0 (no), NetworkManager resets the SR-IOV parameters when the connection is deactivated. When set to 1 (yes), NetworkManager preserves those parameters on the device. If the value is -1 (default), NetworkManager looks up a global default value in the configuration; in case no such value is defined, it uses 0 (no) as fallback.

total-vfs

uint32

0

The total number of virtual functions to create. Note that when the sriov setting is present NetworkManager enforces the number of virtual functions on the interface (also when it is zero) during activation and resets it upon deactivation. To prevent any changes to SR-IOV parameters don't add a sriov setting to the connection.

vfs

array of vardict

Array of virtual function descriptors. Each VF descriptor is a dictionary mapping attribute names to GVariant values. The 'index' entry is mandatory for each VF. When represented as string a VF is in the form: "INDEX [ATTR=VALUE[ ATTR=VALUE]...]". for example: "2 mac=00:11:22:33:44:55 spoof-check=true". Multiple VFs can be specified using a comma as separator. Currently, the following attributes are supported: mac, spoof-check, trust, min-tx-rate, max-tx-rate, vlans. The "vlans" attribute is represented as a semicolon-separated list of VLAN descriptors, where each descriptor has the form "ID[.PRIORITY[.PROTO]]". PROTO can be either 'q' for 802.1Q (the default) or 'ad' for 802.1ad.

### tc setting
Linux Traffic Control Settings.

Key Name

Value Type

Default Value

Value Description

qdiscs

array of vardict

Array of TC queueing disciplines. When the "tc" setting is present, qdiscs from this property are applied upon activation. If the property is empty, all qdiscs are removed and the device will only have the default qdisc assigned by kernel according to the "net.core.default_qdisc" sysctl. If the "tc" setting is not present, NetworkManager doesn't touch the qdiscs present on the interface.

tfilters

array of vardict

Array of TC traffic filters. When the "tc" setting is present, filters from this property are applied upon activation. If the property is empty, NetworkManager removes all the filters. If the "tc" setting is not present, NetworkManager doesn't touch the filters present on the interface.

### team setting
Teaming Settings.

Key Name

Value Type

Default Value

Value Description

config

string

The JSON configuration for the team network interface. The property should contain raw JSON configuration data suitable for teamd, because the value is passed directly to teamd. If not specified, the default configuration is used. See man teamd.conf for the format details.

interface-name

string

Deprecated in favor of connection.interface-name, but can be used for backward-compatibility with older daemons, to set the team's interface name.

link-watchers

array of vardict

Link watchers configuration for the connection: each link watcher is defined by a dictionary, whose keys depend upon the selected link watcher. Available link watchers are 'ethtool', 'nsna_ping' and 'arp_ping' and it is specified in the dictionary with the key 'name'. Available keys are: ethtool: 'delay-up', 'delay-down', 'init-wait'; nsna_ping: 'init-wait', 'interval', 'missed-max', 'target-host'; arp_ping: all the ones in nsna_ping and 'source-host', 'validate-active', 'validate-inactive', 'send-always'. See teamd.conf man for more details.

mcast-rejoin-count

int32

-1

Corresponds to the teamd mcast_rejoin.count.

mcast-rejoin-interval

int32

-1

Corresponds to the teamd mcast_rejoin.interval.

notify-peers-count

int32

-1

Corresponds to the teamd notify_peers.count.

notify-peers-interval

int32

-1

Corresponds to the teamd notify_peers.interval.

runner

string

Corresponds to the teamd runner.name. Permitted values are: "roundrobin", "broadcast", "activebackup", "loadbalance", "lacp", "random".

runner-active

boolean

TRUE

Corresponds to the teamd runner.active.

runner-agg-select-policy

string

Corresponds to the teamd runner.agg_select_policy.

runner-fast-rate

boolean

FALSE

Corresponds to the teamd runner.fast_rate.

runner-hwaddr-policy

string

Corresponds to the teamd runner.hwaddr_policy.

runner-min-ports

int32

-1

Corresponds to the teamd runner.min_ports.

runner-sys-prio

int32

-1

Corresponds to the teamd runner.sys_prio.

runner-tx-balancer

string

Corresponds to the teamd runner.tx_balancer.name.

runner-tx-balancer-interval

int32

-1

Corresponds to the teamd runner.tx_balancer.interval.

runner-tx-hash

array of string

Corresponds to the teamd runner.tx_hash.

### team-port setting
Team Port Settings.

Key Name

Value Type

Default Value

Value Description

config

string

The JSON configuration for the team port. The property should contain raw JSON configuration data suitable for teamd, because the value is passed directly to teamd. If not specified, the default configuration is used. See man teamd.conf for the format details.

lacp-key

int32

-1

Corresponds to the teamd ports.PORTIFNAME.lacp_key.

lacp-prio

int32

-1

Corresponds to the teamd ports.PORTIFNAME.lacp_prio.

link-watchers

array of vardict

Link watchers configuration for the connection: each link watcher is defined by a dictionary, whose keys depend upon the selected link watcher. Available link watchers are 'ethtool', 'nsna_ping' and 'arp_ping' and it is specified in the dictionary with the key 'name'. Available keys are: ethtool: 'delay-up', 'delay-down', 'init-wait'; nsna_ping: 'init-wait', 'interval', 'missed-max', 'target-host'; arp_ping: all the ones in nsna_ping and 'source-host', 'validate-active', 'validate-inactive', 'send-always'. See teamd.conf man for more details.

prio

int32

0

Corresponds to the teamd ports.PORTIFNAME.prio.

queue-id

int32

-1

Corresponds to the teamd ports.PORTIFNAME.queue_id. When set to -1 means the parameter is skipped from the json config.

sticky

boolean

FALSE

Corresponds to the teamd ports.PORTIFNAME.sticky.

### tun setting
Tunnel Settings.

Key Name

Value Type

Default Value

Value Description

group

string

The group ID which will own the device. If set to NULL everyone will be able to use the device.

mode

uint32

1

The operating mode of the virtual device. Allowed values are 1 (tun) to create a layer 3 device and 2 (tap) to create an Ethernet-like layer 2 one.

multi-queue

boolean

FALSE

If the property is set to TRUE, the interface will support multiple file descriptors (queues) to parallelize packet sending or receiving. Otherwise, the interface will only support a single queue.

owner

string

The user ID which will own the device. If set to NULL everyone will be able to use the device.

pi

boolean

FALSE

If TRUE the interface will prepend a 4 byte header describing the physical interface to the packets.

vnet-hdr

boolean

FALSE

If TRUE the IFF_VNET_HDR the tunnel packets will include a virtio network header.

### user setting
General User Profile Settings.

Key Name

Value Type

Default Value

Value Description

data

dict of string to string

{}

A dictionary of key/value pairs with user data. This data is ignored by NetworkManager and can be used at the users discretion. The keys only support a strict ascii format, but the values can be arbitrary UTF8 strings up to a certain length.

### vlan setting
VLAN Settings.

Key Name

Value Type

Default Value

Value Description

egress-priority-map

array of string

For outgoing packets, a list of mappings from Linux SKB priorities to 802.1p priorities. The mapping is given in the format "from:to" where both "from" and "to" are unsigned integers, ie "7:3".

flags

NMVlanFlags (uint32)

One or more flags which control the behavior and features of the VLAN interface. Flags include 0x1 (reorder-headers) (reordering of output packet headers), 0x2 (gvrp) (use of the GVRP protocol), and 0x4 (loose-binding) (loose binding of the interface to its controller device's operating state). 0x8 (mvrp) (use of the MVRP protocol). The default value of this property is NM_VLAN_FLAG_REORDER_HEADERS, but it used to be 0. To preserve backward compatibility, the default-value in the D-Bus API continues to be 0 and a missing property on D-Bus is still considered as 0.

id

uint32

0

The VLAN identifier that the interface created by this connection should be assigned. The valid range is from 0 to 4094, without the reserved id 4095.

ingress-priority-map

array of string

For incoming packets, a list of mappings from 802.1p priorities to Linux SKB priorities. The mapping is given in the format "from:to" where both "from" and "to" are unsigned integers, ie "7:3".

interface-name

string

Deprecated in favor of connection.interface-name, but can be used for backward-compatibility with older daemons, to set the vlan's interface name.

parent

string

If given, specifies the parent interface name or parent connection UUID from which this VLAN interface should be created. If this property is not specified, the connection must contain an "802-3-ethernet" setting with a "mac-address" property.

protocol

string

Specifies the VLAN protocol to use for encapsulation. Supported values are: '802.1Q', '802.1ad'. If not specified the default value is '802.1Q'.

### vpn setting
VPN Settings.

Key Name

Value Type

Default Value

Value Description

data

dict of string to string

{}

Dictionary of key/value pairs of VPN plugin specific data. Both keys and values must be strings.

persistent

boolean

FALSE

If the VPN service supports persistence, and this property is TRUE, the VPN will attempt to stay connected across link changes and outages, until explicitly disconnected.

secrets

dict of string to string

{}

Dictionary of key/value pairs of VPN plugin specific secrets like passwords or private keys. Both keys and values must be strings.

service-type

string

D-Bus service name of the VPN plugin that this setting uses to connect to its network. i.e. org.freedesktop.NetworkManager.vpnc for the vpnc plugin.

timeout

uint32

0

Timeout for the VPN service to establish the connection. Some services may take quite a long time to connect. Value of 0 means a default timeout, which is 60 seconds (unless overridden by vpn.timeout in configuration file). Values greater than zero mean timeout in seconds.

user-name

string

If the VPN connection requires a user name for authentication, that name should be provided here. If the connection is available to more than one user, and the VPN requires each user to supply a different name, then leave this property empty. If this property is empty, NetworkManager will automatically supply the username of the user which requested the VPN connection.

### vrf setting
VRF settings.

Key Name

Value Type

Default Value

Value Description

table

uint32

0

The routing table for this VRF.

### vxlan setting
VXLAN Settings.

Key Name

Value Type

Default Value

Value Description

ageing

uint32

300

Specifies the lifetime in seconds of FDB entries learnt by the kernel.

destination-port

uint32

8472

Specifies the UDP destination port to communicate to the remote VXLAN tunnel endpoint.

id

uint32

0

Specifies the VXLAN Network Identifier (or VXLAN Segment Identifier) to use.

l2-miss

boolean

FALSE

Specifies whether netlink LL ADDR miss notifications are generated.

l3-miss

boolean

FALSE

Specifies whether netlink IP ADDR miss notifications are generated.

learning

boolean

TRUE

Specifies whether unknown source link layer addresses and IP addresses are entered into the VXLAN device forwarding database.

limit

uint32

0

Specifies the maximum number of FDB entries. A value of zero means that the kernel will store unlimited entries.

local

string

If given, specifies the source IP address to use in outgoing packets.

parent

string

If given, specifies the parent interface name or parent connection UUID.

proxy

boolean

FALSE

Specifies whether ARP proxy is turned on.

remote

string

Specifies the unicast destination IP address to use in outgoing packets when the destination link layer address is not known in the VXLAN device forwarding database, or the multicast IP address to join.

rsc

boolean

FALSE

Specifies whether route short circuit is turned on.

source-port-max

uint32

0

Specifies the maximum UDP source port to communicate to the remote VXLAN tunnel endpoint.

source-port-min

uint32

0

Specifies the minimum UDP source port to communicate to the remote VXLAN tunnel endpoint.

tos

uint32

0

Specifies the TOS value to use in outgoing packets.

ttl

uint32

0

Specifies the time-to-live value to use in outgoing packets.

### wifi-p2p setting
Wi-Fi P2P Settings.

Key Name

Value Type

Default Value

Value Description

peer

string

The P2P device that should be connected to. Currently, this is the only way to create or join a group.

wfd-ies

byte array

The Wi-Fi Display (WFD) Information Elements (IEs) to set. Wi-Fi Display requires a protocol specific information element to be set in certain Wi-Fi frames. These can be specified here for the purpose of establishing a connection. This setting is only useful when implementing a Wi-Fi Display client.

wps-method

uint32

0

Flags indicating which mode of WPS is to be used. There's little point in changing the default setting as NetworkManager will automatically determine the best method to use.

### wimax setting
WiMax Settings.

Key Name

Value Type

Default Value

Value Description

mac-address

byte array

If specified, this connection will only apply to the WiMAX device whose MAC address matches. This property does not change the MAC address of the device (known as MAC spoofing). This property is deprecated since version 1.2.WiMAX is no longer supported.

network-name

string

Network Service Provider (NSP) name of the WiMAX network this connection should use. This property is deprecated since version 1.2.WiMAX is no longer supported.

### 802-3-ethernet setting
Wired Ethernet Settings.

Key Name

Value Type

Default Value

Value Description

accept-all-mac-addresses

NMTernary (int32)

When TRUE, setup the interface to accept packets for all MAC addresses. This is enabling the kernel interface flag IFF_PROMISC. When FALSE, the interface will only accept the packets with the interface destination mac address or broadcast.

assigned-mac-address

string

The new field for the cloned MAC address. It can be either a hardware address in ASCII representation, or one of the special values "preserve", "permanent", "random" or "stable". This field replaces the deprecated "cloned-mac-address" on D-Bus, which can only contain explicit hardware addresses. Note that this property only exists in D-Bus API. libnm and nmcli continue to call this property "cloned-mac-address".

auto-negotiate

boolean

FALSE

When TRUE, enforce auto-negotiation of speed and duplex mode. If "speed" and "duplex" properties are both specified, only that single mode will be advertised and accepted during the link auto-negotiation process: this works only for BASE-T 802.3 specifications and is useful for enforcing gigabits modes, as in these cases link negotiation is mandatory. When FALSE, "speed" and "duplex" properties should be both set or link configuration will be skipped.

cloned-mac-address

byte array

This D-Bus field is deprecated in favor of "assigned-mac-address" which is more flexible and allows specifying special variants like "random". For libnm and nmcli, this field is called "cloned-mac-address".

duplex

string

When a value is set, either "half" or "full", configures the device to use the specified duplex mode. If "auto-negotiate" is "yes" the specified duplex mode will be the only one advertised during link negotiation: this works only for BASE-T 802.3 specifications and is useful for enforcing gigabits modes, as in these cases link negotiation is mandatory. If the value is unset (the default), the link configuration will be either skipped (if "auto-negotiate" is "no", the default) or will be auto-negotiated (if "auto-negotiate" is "yes") and the local device will advertise all the supported duplex modes. Must be set together with the "speed" property if specified. Before specifying a duplex mode be sure your device supports it.

generate-mac-address-mask

string

With "cloned-mac-address" setting "random" or "stable", by default all bits of the MAC address are scrambled and a locally-administered, unicast MAC address is created. This property allows one to specify that certain bits are fixed. Note that the least significant bit of the first MAC address will always be unset to create a unicast MAC address. If the property is NULL, it is eligible to be overwritten by a default connection setting. If the value is still NULL or an empty string, the default is to create a locally-administered, unicast MAC address. If the value contains one MAC address, this address is used as mask. The set bits of the mask are to be filled with the current MAC address of the device, while the unset bits are subject to randomization. Setting "FE:FF:FF:00:00:00" means to preserve the OUI of the current MAC address and only randomize the lower 3 bytes using the "random" or "stable" algorithm. If the value contains one additional MAC address after the mask, this address is used instead of the current MAC address to fill the bits that shall not be randomized. For example, a value of "FE:FF:FF:00:00:00 68:F7:28:00:00:00" will set the OUI of the MAC address to 68:F7:28, while the lower bits are randomized. A value of "02:00:00:00:00:00 00:00:00:00:00:00" will create a fully scrambled globally-administered, burned-in MAC address. If the value contains more than one additional MAC addresses, one of them is chosen randomly. For example, "02:00:00:00:00:00 00:00:00:00:00:00 02:00:00:00:00:00" will create a fully scrambled MAC address, randomly locally or globally administered.

mac-address

byte array

If specified, this connection will only apply to the Ethernet device whose permanent MAC address matches. This property does not change the MAC address of the device (i.e. MAC spoofing).

mac-address-blacklist

array of string

If specified, this connection will never apply to the Ethernet device whose permanent MAC address matches an address in the list. Each MAC address is in the standard hex-digits-and-colons notation (00:11:22:33:44:55).

mac-address-denylist

array of string

If specified, this connection will never apply to the Ethernet device whose permanent MAC address matches an address in the list. Each MAC address is in the standard hex-digits-and-colons notation (00:11:22:33:44:55).

mtu

uint32

0

If non-zero, only transmit packets of the specified size or smaller, breaking larger packets up into multiple Ethernet frames.

port

string

Specific port type to use if the device supports multiple attachment methods. One of "tp" (Twisted Pair), "aui" (Attachment Unit Interface), "bnc" (Thin Ethernet) or "mii" (Media Independent Interface). If the device supports only one port type, this setting is ignored.

s390-nettype

string

s390 network device type; one of "qeth", "lcs", or "ctc", representing the different types of virtual network devices available on s390 systems.

s390-options

dict of string to string

{}

Dictionary of key/value pairs of s390-specific device options. Both keys and values must be strings. Allowed keys include "portno", "layer2", "portname", "protocol", among others. Key names must contain only alphanumeric characters (ie, [a-zA-Z0-9]). Currently, NetworkManager itself does nothing with this information. However, s390utils ships a udev rule which parses this information and applies it to the interface.

s390-subchannels

array of string

Identifies specific subchannels that this network device uses for communication with z/VM or s390 host. Like the "mac-address" property for non-z/VM devices, this property can be used to ensure this connection only applies to the network device that uses these subchannels. The list should contain exactly 3 strings, and each string may only be composed of hexadecimal characters and the period (.) character.

speed

uint32

0

When a value greater than 0 is set, configures the device to use the specified speed. If "auto-negotiate" is "yes" the specified speed will be the only one advertised during link negotiation: this works only for BASE-T 802.3 specifications and is useful for enforcing gigabit speeds, as in this case link negotiation is mandatory. If the value is unset (0, the default), the link configuration will be either skipped (if "auto-negotiate" is "no", the default) or will be auto-negotiated (if "auto-negotiate" is "yes") and the local device will advertise all the supported speeds. In Mbit/s, ie 100 == 100Mbit/s. Must be set together with the "duplex" property when non-zero. Before specifying a speed value be sure your device supports it.

wake-on-lan

uint32

1

The NMSettingWiredWakeOnLan options to enable. Not all devices support all options. May be any combination of 0x2 (phy), 0x4 (unicast), 0x8 (multicast), 0x10 (broadcast), 0x20 (arp), 0x40 (magic) or the special values 0x1 (default) (to use global settings) and 0x8000 (ignore) (to disable management of Wake-on-LAN in NetworkManager).

wake-on-lan-password

string

If specified, the password used with magic-packet-based Wake-on-LAN, represented as an Ethernet MAC address. If NULL, no password will be required.

### wireguard setting
WireGuard Settings.

Key Name

Value Type

Default Value

Value Description

fwmark

uint32

0

The use of fwmark is optional and is by default off. Setting it to 0 disables it. Otherwise, it is a 32-bit fwmark for outgoing packets. Note that "ip4-auto-default-route" or "ip6-auto-default-route" enabled, implies to automatically choose a fwmark.

ip4-auto-default-route

NMTernary (int32)

Whether to enable special handling of the IPv4 default route. If enabled, the IPv4 default route from wireguard.peer-routes will be placed to a dedicated routing-table and two policy routing rules will be added. The fwmark number is also used as routing-table for the default-route, and if fwmark is zero, an unused fwmark/table is chosen automatically. This corresponds to what wg-quick does with Table=auto and what WireGuard calls "Improved Rule-based Routing". Note that for this automatism to work, you usually don't want to set ipv4.gateway, because that will result in a conflicting default route. Leaving this at the default will enable this option automatically if ipv4.never-default is not set and there are any peers that use a default-route as allowed-ips. Since this automatism only makes sense if you also have a peer with an /0 allowed-ips, it is usually not necessary to enable this explicitly. However, you can disable it if you want to configure your own routing and rules.

ip6-auto-default-route

NMTernary (int32)

Like ip4-auto-default-route, but for the IPv6 default route.

listen-port

uint32

0

The listen-port. If listen-port is not specified, the port will be chosen randomly when the interface comes up.

mtu

uint32

0

If non-zero, only transmit packets of the specified size or smaller, breaking larger packets up into multiple fragments. If zero a default MTU is used. Note that contrary to wg-quick's MTU setting, this does not take into account the current routes at the time of activation.

peer-routes

boolean

TRUE

Whether to automatically add routes for the AllowedIPs ranges of the peers. If TRUE (the default), NetworkManager will automatically add routes in the routing tables according to ipv4.route-table and ipv6.route-table. Usually you want this automatism enabled. If FALSE, no such routes are added automatically. In this case, the user may want to configure static routes in ipv4.routes and ipv6.routes, respectively. Note that if the peer's AllowedIPs is "0.0.0.0/0" or "::/0" and the profile's ipv4.never-default or ipv6.never-default setting is enabled, the peer route for this peer won't be added automatically.

peers

array of 'a{sv}'

Array of dictionaries for the WireGuard peers.

private-key

string

The 256 bit private-key in base64 encoding.

private-key-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "private-key" property.

### 802-11-wireless setting
Wi-Fi Settings.

Key Name

Value Type

Default Value

Value Description

ap-isolation

NMTernary (int32)

Configures AP isolation, which prevents communication between wireless devices connected to this AP. This property can be set to a value different from -1 (default) only when the interface is configured in AP mode. If set to 1 (true), devices are not able to communicate with each other. This increases security because it protects devices against attacks from other clients in the network. At the same time, it prevents devices to access resources on the same wireless networks as file shares, printers, etc. If set to 0 (false), devices can talk to each other. When set to -1 (default), the global default is used; in case the global default is unspecified it is assumed to be 0 (false).

assigned-mac-address

string

The new field for the cloned MAC address. It can be either a hardware address in ASCII representation, or one of the special values "preserve", "permanent", "random" or "stable". This field replaces the deprecated "cloned-mac-address" on D-Bus, which can only contain explicit hardware addresses. Note that this property only exists in D-Bus API. libnm and nmcli continue to call this property "cloned-mac-address".

band

string

802.11 frequency band of the network. One of "a" for 5GHz 802.11a or "bg" for 2.4GHz 802.11. This will lock associations to the Wi-Fi network to the specific band, i.e. if "a" is specified, the device will not associate with the same network in the 2.4GHz band even if the network's settings are compatible. This setting depends on specific driver capability and may not work with all drivers.

bssid

byte array

If specified, directs the device to only associate with the given access point. This capability is highly driver dependent and not supported by all devices. Note: this property does not control the BSSID used when creating an Ad-Hoc network and is unlikely to in the future. Locking a client profile to a certain BSSID will prevent roaming and also disable background scanning. That can be useful, if there is only one access point for the SSID.

channel

uint32

0

Wireless channel to use for the Wi-Fi connection. The device will only join (or create for Ad-Hoc networks) a Wi-Fi network on the specified channel. Because channel numbers overlap between bands, this property also requires the "band" property to be set.

channel-width

int32

0

Specifies width of the wireless channel in Access Point (AP) mode. When set to 0 (auto) (the default), the channel width is automatically determined. At the moment, this means that the safest (smallest) width is chosen. If the value is not 0 (auto), then the 'channel' property must also be set. When using the 2.4GHz band, the width can be at most 40MHz. This property can be set to a value different from 0 (auto) only when the interface is configured in AP mode.

cloned-mac-address

byte array

This D-Bus field is deprecated in favor of "assigned-mac-address" which is more flexible and allows specifying special variants like "random". For libnm and nmcli, this field is called "cloned-mac-address".

generate-mac-address-mask

string

With "cloned-mac-address" setting "random" or "stable", by default all bits of the MAC address are scrambled and a locally-administered, unicast MAC address is created. This property allows one to specify that certain bits are fixed. Note that the least significant bit of the first MAC address will always be unset to create a unicast MAC address. If the property is NULL, it is eligible to be overwritten by a default connection setting. If the value is still NULL or an empty string, the default is to create a locally-administered, unicast MAC address. If the value contains one MAC address, this address is used as mask. The set bits of the mask are to be filled with the current MAC address of the device, while the unset bits are subject to randomization. Setting "FE:FF:FF:00:00:00" means to preserve the OUI of the current MAC address and only randomize the lower 3 bytes using the "random" or "stable" algorithm. If the value contains one additional MAC address after the mask, this address is used instead of the current MAC address to fill the bits that shall not be randomized. For example, a value of "FE:FF:FF:00:00:00 68:F7:28:00:00:00" will set the OUI of the MAC address to 68:F7:28, while the lower bits are randomized. A value of "02:00:00:00:00:00 00:00:00:00:00:00" will create a fully scrambled globally-administered, burned-in MAC address. If the value contains more than one additional MAC addresses, one of them is chosen randomly. For example, "02:00:00:00:00:00 00:00:00:00:00:00 02:00:00:00:00:00" will create a fully scrambled MAC address, randomly locally or globally administered.

hidden

boolean

FALSE

If TRUE, indicates that the network is a non-broadcasting network that hides its SSID. This works both in infrastructure and AP mode. In infrastructure mode, various workarounds are used for a more reliable discovery of hidden networks, such as probe-scanning the SSID. However, these workarounds expose inherent insecurities with hidden SSID networks, and thus hidden SSID networks should be used with caution. In AP mode, the created network does not broadcast its SSID. Note that marking the network as hidden may be a privacy issue for you (in infrastructure mode) or client stations (in AP mode), as the explicit probe-scans are distinctly recognizable on the air.

mac-address

byte array

If specified, this connection will only apply to the Wi-Fi device whose permanent MAC address matches. This property does not change the MAC address of the device (i.e. MAC spoofing).

mac-address-blacklist

array of string

A list of permanent MAC addresses of Wi-Fi devices to which this connection should never apply. Each MAC address should be given in the standard hex-digits-and-colons notation (eg "00:11:22:33:44:55").

mac-address-denylist

array of string

A list of permanent MAC addresses of Wi-Fi devices to which this connection should never apply. Each MAC address should be given in the standard hex-digits-and-colons notation (eg "00:11:22:33:44:55").

mac-address-randomization

uint32

0

One of 0 (default) (never randomize unless the user has set a global default to randomize and the supplicant supports randomization), 1 (never) (never randomize the MAC address), or 2 (always) (always randomize the MAC address). This property is deprecated since version 1.4.Use the "cloned-mac-address" property instead.

mode

string

Wi-Fi network mode; one of "infrastructure", "mesh", "adhoc" or "ap". If blank, infrastructure is assumed.

mtu

uint32

0

If non-zero, only transmit packets of the specified size or smaller, breaking larger packets up into multiple Ethernet frames.

powersave

uint32

0

One of 2 (disable) (disable Wi-Fi power saving), 3 (enable) (enable Wi-Fi power saving), 1 (ignore) (don't touch currently configure setting) or 0 (default) (use the globally configured value). All other values are reserved.

rate

uint32

0

This property is not implemented and has no effect. This property is deprecated since version 1.44.This property is not implemented and has no effect.

security

This property is deprecated and has no effect. For backwards compatibility, it can be set to "802-11-wireless-security" if the profile has a wireless security setting.

seen-bssids

array of string

A list of BSSIDs (each BSSID formatted as a MAC address like "00:11:22:33:44:55") that have been detected as part of the Wi-Fi network. NetworkManager internally tracks previously seen BSSIDs. The property is only meant for reading and reflects the BSSID list of NetworkManager. The changes you make to this property will not be preserved. This is not a regular property that the user would configure. Instead, NetworkManager automatically sets the seen BSSIDs and tracks them internally in "/var/lib/NetworkManager/seen-bssids" file.

ssid

byte array

SSID of the Wi-Fi network. Must be specified.

tx-power

uint32

0

This property is not implemented and has no effect. This property is deprecated since version 1.44.This property is not implemented and has no effect.

wake-on-wlan

uint32

1

The NMSettingWirelessWakeOnWLan options to enable. Not all devices support all options. May be any combination of 0x2 (any), 0x4 (disconnect), 0x8 (magic), 0x10 (gtk-rekey-failure), 0x20 (eap-identity-request), 0x40 (4way-handshake), 0x80 (rfkill-release), 0x100 (tcp) or the special values 0x1 (default) (to use global settings) and 0x8000 (ignore) (to disable management of Wake-on-LAN in NetworkManager).

### 802-11-wireless-security setting
Wi-Fi Security Settings.

Key Name

Value Type

Default Value

Value Description

auth-alg

string

When WEP is used (ie, key-mgmt = "none" or "ieee8021x") indicate the 802.11 authentication algorithm required by the AP here. One of "open" for Open System, "shared" for Shared Key, or "leap" for Cisco LEAP. When using Cisco LEAP (ie, key-mgmt = "ieee8021x" and auth-alg = "leap") the "leap-username" and "leap-password" properties must be specified.

fils

int32

0

Indicates whether Fast Initial Link Setup (802.11ai) must be enabled for the connection. One of 0 (default) (use global default value), 1 (disable) (disable FILS), 2 (optional) (enable FILS if the supplicant and the access point support it) or 3 (required) (enable FILS and fail if not supported). When set to 0 (default) and no global default is set, FILS will be optionally enabled.

group

array of string

A list of group/broadcast encryption algorithms which prevents connections to Wi-Fi networks that do not utilize one of the algorithms in the list. For maximum compatibility leave this property empty. Each list element may be one of "wep40", "wep104", "tkip", or "ccmp".

key-mgmt

string

Key management used for the connection. One of "none" (WEP or no password protection), "ieee8021x" (Dynamic WEP), "owe" (Opportunistic Wireless Encryption), "wpa-psk" (WPA2 + WPA3 personal), "sae" (WPA3 personal only), "wpa-eap" (WPA2 + WPA3 enterprise) or "wpa-eap-suite-b-192" (WPA3 enterprise only). This property must be set for any Wi-Fi connection that uses security.

leap-password

string

The login password for legacy LEAP connections (ie, key-mgmt = "ieee8021x" and auth-alg = "leap").

leap-password-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "leap-password" property.

leap-username

string

The login username for legacy LEAP connections (ie, key-mgmt = "ieee8021x" and auth-alg = "leap").

pairwise

array of string

A list of pairwise encryption algorithms which prevents connections to Wi-Fi networks that do not utilize one of the algorithms in the list. For maximum compatibility leave this property empty. Each list element may be one of "tkip" or "ccmp".

pmf

int32

0

Indicates whether Protected Management Frames (802.11w) must be enabled for the connection. One of 0 (default) (use global default value), 1 (disable) (disable PMF), 2 (optional) (enable PMF if the supplicant and the access point support it) or 3 (required) (enable PMF and fail if not supported). When set to 0 (default) and no global default is set, PMF will be optionally enabled.

proto

array of string

List of strings specifying the allowed WPA protocol versions to use. Each element may be one "wpa" (allow WPA) or "rsn" (allow WPA2/RSN). If not specified, both WPA and RSN connections are allowed.

psk

string

Pre-Shared-Key for WPA networks. For WPA-PSK, it's either an ASCII passphrase of 8 to 63 characters that is (as specified in the 802.11i standard) hashed to derive the actual key, or the key in form of 64 hexadecimal character. The WPA3-Personal networks use a passphrase of any length for SAE authentication.

psk-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "psk" property.

wep-key-flags

NMSettingSecretFlags (uint32)

Flags indicating how to handle the "wep-key0", "wep-key1", "wep-key2", and "wep-key3" properties.

wep-key-type

NMWepKeyType (uint32)

Controls the interpretation of WEP keys. Allowed values are 1 (key), in which case the key is either a 10- or 26-character hexadecimal string, or a 5- or 13-character ASCII password; or 2 (passphrase), in which case the passphrase is provided as a string and will be hashed using the de-facto MD5 method to derive the actual WEP key.

wep-key0

string

Index 0 WEP key. This is the WEP key used in most networks. See the "wep-key-type" property for a description of how this key is interpreted.

wep-key1

string

Index 1 WEP key. This WEP index is not used by most networks. See the "wep-key-type" property for a description of how this key is interpreted.

wep-key2

string

Index 2 WEP key. This WEP index is not used by most networks. See the "wep-key-type" property for a description of how this key is interpreted.

wep-key3

string

Index 3 WEP key. This WEP index is not used by most networks. See the "wep-key-type" property for a description of how this key is interpreted.

wep-tx-keyidx

uint32

0

When static WEP is used (ie, key-mgmt = "none") and a non-default WEP key index is used by the AP, put that WEP key index here. Valid values are 0 (default key) through 3. Note that some consumer access points (like the Linksys WRT54G) number the keys 1 - 4.

wps-method

uint32

0

Flags indicating which mode of WPS is to be used if any. There's little point in changing the default setting as NetworkManager will automatically determine whether it's feasible to start WPS enrollment from the Access Point capabilities. WPS can be disabled by setting this property to a value of 1.

### wpan setting
IEEE 802.15.4 (WPAN) MAC Settings.

Key Name

Value Type

Default Value

Value Description

channel

int32

-1

IEEE 802.15.4 channel. A positive integer or -1, meaning "do not set, use whatever the device is already set to".

mac-address

string

If specified, this connection will only apply to the IEEE 802.15.4 (WPAN) MAC layer device whose permanent MAC address matches.

page

int32

-1

IEEE 802.15.4 channel page. A positive integer or -1, meaning "do not set, use whatever the device is already set to".

pan-id

uint32

65535

IEEE 802.15.4 Personal Area Network (PAN) identifier.

short-address

uint32

65535

Short IEEE 802.15.4 address to be used within a restricted environment.

### bond-port setting
Bond Port Settings.

Key Name

Value Type

Default Value

Value Description

prio

int32

0

The port priority for bond active port re-selection during failover. A higher number means a higher priority in selection. The primary port has the highest priority. This option is only compatible with active-backup, balance-tlb and balance-alb modes.

queue-id

uint32

0

The queue ID of this bond port. The maximum value of queue ID is the number of TX queues currently active in device.

### geneve setting
GENEVE Settings.

Key Name

Value Type

Default Value

Value Description

destination-port

uint32

6081

Specifies the UDP destination port to communicate to the remote GENEVE tunnel endpoint.

df

int32

0

Specifies how the Don't Fragment (DF) flag should be handled in the outer IP header of GENEVE tunnel packets. 0 (unset) (0): Don't set the DF flag, packets may be fragmented. 1 (set) (1): Always set the DF flag, packets will not be fragmented. 2 (inherit) (2): Inherit the DF flag from the inner IP header.

id

uint32

0

Specifies the GENEVE Network Identifier (or GENEVE Segment Identifier) to use.

remote

string

Specifies the unicast destination IP address to use in outgoing packets when communicating with the remote GENEVE tunnel endpoint.

tos

uint32

0

Specifies the TOS value to use in outgoing packets. The special value "inherit" (1) means inherit from outer packet.

ttl

int32

0

Specifies the time-to-live value to use in outgoing packets. The special value "inherit" (-1) means inherit from outer packet, 0 means auto, 1-255 are fixed values.

### hostname setting
Hostname settings.

Key Name

Value Type

Default Value

Value Description

from-dhcp

NMTernary (int32)

Whether the system hostname can be determined from DHCP on this connection. When set to -1 (default), the value from global configuration is used. If the property doesn't have a value in the global configuration, NetworkManager assumes the value to be 1 (true).

from-dns-lookup

NMTernary (int32)

Whether the system hostname can be determined from reverse DNS lookup of addresses on this device. When set to -1 (default), the value from global configuration is used. If the property doesn't have a value in the global configuration, NetworkManager assumes the value to be 1 (true).

only-from-default

NMTernary (int32)

If set to 1 (true), NetworkManager attempts to get the hostname via DHCPv4/DHCPv6 or reverse DNS lookup on this device only when the device has the default route for the given address family (IPv4/IPv6). If set to 0 (false), the hostname can be set from this device even if it doesn't have the default route. When set to -1 (default), the value from global configuration is used. If the property doesn't have a value in the global configuration, NetworkManager assumes the value to be 0 (false).

priority

int32

0

The relative priority of this connection to determine the system hostname. A lower numerical value is better (higher priority). A connection with higher priority is considered before connections with lower priority. If the value is zero, it can be overridden by a global value from NetworkManager configuration. If the property doesn't have a value in the global configuration, the value is assumed to be 100. Negative values have the special effect of excluding other connections with a greater numerical priority value; so in presence of at least one negative priority, only connections with the lowest priority value will be used to determine the hostname.

### link setting
Link settings.

Key Name

Value Type

Default Value

Value Description

gro-max-size

int64

-1

The maximum size of a packet built by the Generic Receive Offload stack for this device. The value must be between 0 and 4294967295. When set to -1, the existing value is preserved.

gso-max-segments

int64

-1

The maximum segments of a Generic Segment Offload packet the device should accept. The value must be between 0 and 4294967295. When set to -1, the existing value is preserved.

gso-max-size

int64

-1

The maximum size of a Generic Segment Offload packet the device should accept. The value must be between 0 and 4294967295. When set to -1, the existing value is preserved.

tx-queue-length

int64

-1

The size of the transmit queue for the device, in number of packets. The value must be between 0 and 4294967295. When set to -1, the existing value is preserved.

### loopback setting
Loopback Link Settings.

Key Name

Value Type

Default Value

Value Description

mtu

uint32

0

If non-zero, only transmit packets of the specified size or smaller, breaking larger packets up into multiple Ethernet frames.

### ovs-external-ids setting
OVS External IDs Settings.

Key Name

Value Type

Default Value

Value Description

data

dict of string to string

{}

A dictionary of key/value pairs with external-ids for OVS.

### ovs-other-config setting
OVS Other Config Settings.

Key Name

Value Type

Default Value

Value Description

data

dict of string to string

{}

A dictionary of key/value pairs with other_config settings for OVS. See also "other_config" in the "ovs-vswitchd.conf.db" manual for the keys that OVS supports.

### prefix-delegation setting
IPv6 prefix delegation settings.

Key Name

Value Type

Default Value

Value Description

subnet-id

int64

-1

The subnet ID to use on the interface from the prefix delegation received via an upstream interface. Set to a value between 0 and 0xffffffff (2^32 - 1) to indicate a specific subnet ID; or set to -1 to automatically choose an available subnet ID.

### veth setting
Veth Settings.

Key Name

Value Type

Default Value

Value Description

peer

string

This property specifies the peer interface name of the veth. This property is mandatory.

### Secret flag types:
Each password or secret property in a setting has an associated flags property that describes how to handle that secret. The flags property is a bitfield that contains zero or more of the following values logically OR-ed together.

•0x0 (none) - the system is responsible for providing and storing this secret. This may be required so that secrets are already available before the user logs in. It also commonly means that the secret will be stored in plain text on disk, accessible to root only. For example via the keyfile settings plugin as described in the "PLUGINS" section in NetworkManager.conf(5).

•0x1 (agent-owned) - a user-session secret agent is responsible for providing and storing this secret; when it is required, agents will be asked to provide it.

•0x2 (not-saved) - this secret should not be saved but should be requested from the user each time it is required. This flag should be used for One-Time-Pad secrets, PIN codes from hardware tokens, or if the user simply does not want to save the secret.

•0x4 (not-required) - in some situations it cannot be automatically determined that a secret is required or not. This flag hints that the secret is not required and should not be requested from the user.

## FILES
/etc/NetworkManager/system-connections or distro plugin-specific location

## SEE ALSO
nm-settings-nmcli(5), nm-settings-keyfile(5), NetworkManager(8), nmcli(1), nmcli-examples(7), NetworkManager.conf(5)