{ ... }: {
  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";
      };
    };
  };

  networking = {
    useDHCP = false;
    # Define VLANS
    nameservers = [ "10.42.97.1" ];
    # resolvconf.enable = false;
    vlans = {
      infrastructure = {
         id = 101;
         interface = "enp5s0";
      };
      vserver = {
         id = 97;
         interface = "enp5s0";
      };
      multimedia = {
         id = 99;
         interface = "enp5s0";
      };
      smart = {
        id = 100;
        interface = "enp5s0";
      };
      guest = {
        id = 254;
        interface = "enp5s0";
      };
    };
    # macvlans.server = {
    #   interface = "vserver";
    #   mode = "bridge";
    # };
    bridges = {
      server = {
        interfaces = [ "vserver" ];
      };
    };

    interfaces = {
      # Don't request DHCP on the physical interfaces
      lan.useDHCP = false;
      enp4s0.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;
        }];
      };
      infrastructure = {
        ipv4.addresses = [{
          address = "10.42.101.1";
          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;
        }];
      };
    };
  };
}