{ config, pkgs, lib, ... }:
{

  environment.systemPackages = with pkgs; [
    ddclient
  ];

  # Dynamic DNS configuration
  services.ddclient = {
    enable = true;
    quiet = true;
    use = "cmd, cmd='/run/current-system/sw/bin/curl https://checkipv4.dedyn.io/'";
    server = "update.dedyn.io";
    extraConfig = "
                login=coolneng.dedyn.io\n
                password='5320e326cf0564e10703e16ef38644da161f195a'\n
                coolneng.dedyn.io\n
                \n
                login=rehiwi.dedyn.io\n
                password='b05f777b8ca7193f5054a308c3cf396e73c2fb69'\n
                rehiwi.dedyn.io\n
                \n
                login=nujabes.dedyn.io\n
                password='IVstfQqFT8mDT9-CXsVS-nbv36rY'\n
                nujabes.dedyn.io\n
                \n
                login=methyl.dedyn.io\n
                password='vQ0S5dSWCwsO4LUSlVWqkZ2LDYD8'\n
                methyl.dedyn.io\n
    ";
  };

  # Firewall configuration
  networking.firewall = {
    allowedTCPPorts = [ 631 6566 ];
    autoLoadConntrackHelpers = true;
    connectionTrackingModules = [ "sane" ];
  };
}