{ ... }: let wan = "ens18"; in { networking = { interfaces.${wan}.ipv4.addresses = [{ address = "10.0.8.101"; prefixLength = 16; }]; defaultGateway = { address = "10.0.0.1"; interface = wan; }; nameservers = [ "10.0.0.2" "10.0.0.3" ]; }; }