nichts/modules/services/ssh.mod.nix

{ lib, ... }:
let
  inherit (lib.options) mkEnableOption;
in
{
  options.modules.programs.ssh.enable = mkEnableOption "ssh";
  config = {
    services.openssh = {
      enable = true;
      ports = [ 22 ];
      settings = {
        PasswordAuthentication = false;
        PermitRootLogin = "no";
      };
    };
  };
}