{ ... }: {
  boot.kernel.sysctl = {
    # if you use ipv4, this is all you need
    "net.ipv4.conf.all.forwarding" = true;
    # If you want to use it for ipv6
    "net.ipv6.conf.all.forwarding" = false;
  };

  systemd.network = {
    wait-online.anyInterface = true;
    links = {
      "10-wan" = {
        matchConfig.PermanentMACAddress = "a8:b8:e0:00:43:c1";
        linkConfig.Name = "wan";
      };
      "20-lan" = {
        matchConfig.PermanentMACAddress = "a8:b8:e0:00:43:c2";
        linkConfig.Name = "lan";
      };
      "30-server" = {
        matchConfig.PermanentMACAddress = "a8:b8:e0:00:43:c3";
        linkConfig.Name = "server";
      };
    };
  };


  networking = {
    useDHCP = false;
    nameservers = [ "9.9.9.9" "149.112.112.112" ];
    # Define VLANS
    vlans = {
      multimedia = {
        id = 3;
        interface = "enp5s0";
      };
      smart = {
        id = 4094;
        interface = "enp5s0";
      };
      guest = {
        id = 100;
        interface = "enp5s0";
      };
    };

    interfaces = {
      # Don't request DHCP on the physical interfaces
      lan.useDHCP = false;
      server.useDHCP = false;
      enp5s0.useDHCP = false;
      
      # Handle the VLANs
      wan.useDHCP = true;
      lan = {
        ipv4.addresses = [{
          address = "10.42.96.1";
          prefixLength = 24;
        }];
      };
      server = {
        ipv4.addresses = [{
          address = "10.42.97.1";
          prefixLength = 24;
        }];
      };
      multimedia = {
        ipv4.addresses = [{
          address = "10.42.99.1";
          prefixLength = 24;
        }];
      };
      smart = {
        ipv4.addresses = [{
          address = "10.42.100.1";
          prefixLength = 24;
        }];
      };
      guest = {
        ipv4.addresses = [{
          address = "10.42.254.1";
          prefixLength = 24;
        }];
      };
    };
  };
}