{ ... }: {
  services.bind = {
    enable = true;
    zones = {
      "darkkirb.de" = {
        master = false;
        masters = [
          "fd00:e621:e621::1"
        ];
        file = "darkkirb.de.zone";
      };
      "chir.rs" = {
        master = false;
        masters = [
          "fd00:e621:e621::1"
        ];
        file = "chir.rs.zone";
      };
      "int.chir.rs" = {
        master = false;
        masters = [
          "fd00:e621:e621::1"
        ];
        file = "int.chir.rs.zone";
      };
      "rpz.int.chir.rs" = {
        master = false;
        masters = [
          "fd00:e621:e621::1"
        ];
        file = "rpz.int.chir.rs.zone";
      };
    };
  };
  networking.firewall.allowedTCPPorts = [ 53 ];
  networking.firewall.allowedUDPPorts = [ 53 ];
}