IPv4 Configuration

By default, NixOS uses DHCP (specifically, dhcpcd) to automatically configure network interfaces. However, you can configure an interface manually as follows:

`networking.interfaces.eth0.ipv4.addresses <None>`_  = [ {
  address = "192.168.1.2";
  prefixLength = 24;
} ];

Typically you’ll also want to set a default gateway and set of name servers:

networking.defaultGateway  = "192.168.1.1";
networking.nameservers  = [ "8.8.8.8" ];

Note

Statically configured interfaces are set up by the systemd service *interface-name*``-cfg.service``. The default gateway and name server configuration is performed by network-setup.service.

The host name is set using networking.hostName:

networking.hostName  = "cartman";

The default host name is nixos. Set it to the empty string ("") to allow the DHCP server to provide the host name.