{ ... }:
{
  networking = {
    firewall.allowedUDPPorts = [ 27015 ];
    vlans.internal = {
      id=100;
      interface="enp42s0";
    };
    interfaces.internal.ipv4.addresses = [{
      address = "11.0.0.100";
      prefixLength = 8;
    }];
  };
}