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{ ... }: let wan = "ens18"; dns = "10.0.0.2"; in { networking = { interfaces.${wan}.ipv4.addresses = [{ address = "10.0.8.101"; prefixLength = 16; }]; defaultGateway = { address = "10.0.0.1"; interface = wan; }; }; services = { dnsmasq = { enable = true; settings.server = [ dns ]; }; }; }