{
  config,
  lib,
  ...
}:
let
  zone = "alin.ovh";
  server = "pdns.${zone}";
  domains = [
    "home.${zone}"
  ];
in
{
  age.secrets = {
    dyndns.file = ../../secrets/dyndns.age;
  };

  services.ddclient = {
    enable = true;

    inherit zone server domains;

    protocol = "nsupdate";
    passwordFile = config.age.secrets.dyndns.path;
  };

  networking.firewall = {
    allowedTCPPorts = [
      22
      80
      443
    ];
    allowedUDPPorts = [
      443
    ];
  };

  services.caddy.virtualHosts = {
    ${builtins.head domains} = {
      extraConfig = lib.mkDefault ''
        respond "Hello, world!"
      '';
    };
  };
}