NetworkManager developers NetworkManager.conf 5 NetworkManager Configuration 0.9.10 NetworkManager.conf NetworkManager configuration file /etc/NetworkManager/NetworkManager.conf, /etc/NetworkManager/conf.d/name.conf This is a configuration file for NetworkManager. It is used to set up various aspects of NetworkManager's behavior. The location of the file may be changed through use of the --config argument for NetworkManager. If a default NetworkManager.conf is provided by your distribution's packages, you should not modify it, since your changes may get overwritten by package updates. Instead, you can add additional .conf files to the conf.d directory. These will be read in order, with later files overriding earlier ones. The configuration file format is so-called key file (sort of ini-style format). It consists of sections (groups) of key-value pairs. Lines beginning with a '#' and blank lines are considered comments. Sections are started by a header line containing the section enclosed in '[' and ']', and ended implicitly by the start of the next section or the end of the file. Each key-value pair must be contained in a section. For keys that take a list of devices as their value, you can specify devices by their MAC addresses or interface names, or "*" to specify all devices. Minimal system settings configuration file looks like this: [main] plugins=keyfile As an extension to the normal keyfile format, you can also append a value to a previously-set list-valued key by doing: plugins+=another-plugin plugins List system settings plugin names separated by ','. These plugins are used to read/write system-wide connection. When more plugins are specified, the connections are read from all listed plugins. When writing connections, the plugins will be asked to save the connection in the order listed here. If the first plugin cannot write out that connection type, or can't write out any connections, the next plugin is tried. If none of the plugins can save the connection, the error is returned to the user. See below for available plugins. dhcp This key sets up what DHCP client NetworkManager will use. Presently dhclient and dhcpcd are supported. The client configured here should be available on your system too. If this key is missing, available DHCP clients are looked for in this order: dhclient, dhcpcd. no-auto-default Comma-separated list of devices for which NetworkManager shouldn't create default wired connection (Auto eth0). By default, NetworkManager creates a temporary wired connection for any Ethernet device that is managed and doesn't have a connection configured. List a device in this option to inhibit creating the default connection for the device. May have the special value * to apply to all devices. When the default wired connection is deleted or saved to a new persistent connection by a plugin, the device is added to a list in the file /var/run/NetworkManager/no-auto-default.state to prevent creating the default connection for that device again. no-auto-default=00:22:68:5c:5d:c4,00:1e:65:ff:aa:ee no-auto-default=eth0,eth1 no-auto-default=* ignore-carrier Set devices for which NetworkManager should ignore device carrier state when deciding whether to activate or deactivate connections. May have the special value * to apply to all devices. dns Set the DNS (resolv.conf) processing mode. default: The default if the key is not specified. NetworkManager will update resolv.conf to reflect the nameservers provided by currently active connections. dnsmasq: NetworkManager will run dnsmasq as a local caching nameserver, using a "split DNS" configuration if you are connected to a VPN, and then update resolv.conf to point to the local nameserver. none: NetworkManager will not modify resolv.conf. This section contains keyfile-specific options and thus only has effect when using the keyfile plugin. hostname Set a persistent hostname. unmanaged-devices Set devices that should be ignored by NetworkManager when using the keyfile plugin. Devices are specified in the following format: mac:<hwaddr> or interface-name:<ifname>. Here hwaddr is the MAC address of the device to be ignored, in hex-digits-and-colons notation. ifname is the interface name of the ignored device. Multiple entries are separated with semicolons. No spaces are allowed in the value. Example: unmanaged-devices=interface-name:em4 unmanaged-devices=mac:00:22:68:1c:59:b1;mac:00:1E:65:30:D1:C4;interface-name:eth2 This section contains keyfile-specific options and thus only has effect when using the ifdown plugin. managed If set to true, then interfaces listed in /etc/network/interfaces are managed by NetworkManager. If set to false, then any interface listed in /etc/network/interfaces will be ignored by NetworkManager. Remember that NetworkManager controls the default route, so because the interface is ignored, NetworkManager may assign the default route to some other interface. The default value is false. This section controls NetworkManager's logging. Any settings here are overridden by the --log-level and --log-domains command-line options. level One of ERR, WARN, INFO, DEBUG. The ERR level logs only critical errors. WARN logs warnings that may reflect operation. INFO logs various informational messages that are useful for tracking state and operations. DEBUG enables verbose logging for debugging purposes. Subsequent levels also log all messages from earlier levels; thus setting the log level to INFO also logs error and warning messages. domains The following log domains are available: HW, RFKILL, ETHER, WIFI, BT, MB, DHCP4, DHCP6, PPP, WIFI_SCAN, IP4, IP6, AUTOIP4, DNS, VPN, SHARING, SUPPLICANT, AGENTS, SETTINGS, SUSPEND, CORE, DEVICE, OLPC, WIMAX, INFINIBAND, FIREWALL, ADSL, BOND, VLAN, BRIDGE. In addition, these special domains can be used: NONE, ALL, DEFAULT, DHCP, IP. This section controls NetworkManager's optional connectivity checking functionality. This allows NetworkManager to detect whether or not the system can actually access the internet or whether it is behind a captive portal. uri The URI of a web page to periodically request when connectivity is being checked. This page should return the header "X-NetworkManager-Status" with a value of "online". Alternatively, it's body content should be set to "NetworkManager is online". The body content check can be controlled by the response option. If this option is blank or missing, connectivity checking is disabled. interval Specified in seconds; controls how often connectivity is checked when a network connection exists. If set to 0 connectivity checking is disabled. If missing, the default is 300 seconds. response If set controls what body content NetworkManager checks for when requesting the URI for connectivity checking. If missing, defaults to "NetworkManager is online" keyfile plugin is the generic plugin that supports all the connection types and capabilities that NetworkManager has. It writes files out in an .ini-style format in /etc/NetworkManager/system-connections. For security, it will ignore files that are readable or writeable by any user or group other than root since private keys and passphrases may be stored in plaintext inside the file. ifcfg-rh This plugin is used on the Fedora and Red Hat Enterprise Linux distributions to read and write configuration from the standard /etc/sysconfig/network-scripts/ifcfg-* files. It currently supports reading wired, WiFi, and 802.1x connections, but does not yet support reading or writing mobile broadband, PPPoE, or VPN connections. To allow reading and writing of these add keyfile plugin to your configuration as well. ifupdown This plugin is used on the Debian and Ubuntu distributions, and reads connections from /etc/network/interfaces. Since it cannot write connections out (that support isn't planned), it is usually paired with the keyfile plugin to enable saving and editing of new connections. The ifupdown plugin supports basic wired and WiFi connections, including WPA-PSK. ifcfg-suse This plugin is only provided for simple backward compatibility with SUSE and OpenSUSE configuration. Most setups should be using the keyfile plugin instead. The ifcfg-suse plugin supports reading wired and WiFi connections, but does not support saving any connection types. NetworkManager8, nmcli1, nm-online1, nm-settings5, nm-applet1, nm-connection-editor1