nixos-server-conf/shared/ssh.nix

{ config, lib, pkgs, modulesPath, ... }:
{
    services = {
        # endlessh = {
        #     enable = true;
        #     port = 22;
        # };

        openssh = {
            enable = true;
            ports = [ 22 23 ];
            # settings = {
            #     AllowUsers = [ "dev" ];
            # };
        };
    };
}