{ ... }: {
  services.dhcpd4 = {
    enable = true;
    interfaces = [ "lan" "server" "smart" "multimedia" "guest" ];
    extraConfig = ''
      option domain-name-servers 10.42.97.1, 9.9.9.9;
      option subnet-mask 255.255.255.0;

      subnet 10.42.96.0 netmask 255.255.255.0 {
        option broadcast-address 10.42.96.255;
        option routers 10.42.97.1;
        interface lan;
        range 10.42.96.128 10.42.96.254;
      }

      subnet 10.42.97.0 netmask 255.255.255.0 {
        option broadcast-address 10.42.97.255;
        option routers 10.42.97.1;
        interface server;
        range 10.42.96.128 10.42.97.254;
      }

      subnet 10.42.99.0 netmask 255.255.255.0 {
        option broadcast-address 10.42.99.255;
        option routers 10.42.99.1;
        interface multimedia;
        range 10.42.99.128 10.42.99.254;
      }

      subnet 10.42.100.0 netmask 255.255.255.0 {
        option broadcast-address 10.42.100.255;
        option routers 10.42.100.1;
        interface smart;
        range 10.42.100.128 10.42.100.254;
      }

      subnet 10.42.254.0 netmask 255.255.255.0 {
        option broadcast-address 10.42.254.255;
        option routers 10.42.254.1;
        interface guest;
        range 10.42.100.128 10.42.254.254;
      }
    '';
  };
}