nixos/hosts/common/optional/openssh.nix

{ lib, config, ... }:
let
  sshPort = 22;
in

{
  services.openssh = {
    enable = true;
    ports = [ sshPort ];
    authorizedKeysFiles = lib.mkForce ["/etc/ssh/authorized_keys.d/default"];
    settings = {
      # Harden
      PasswordAuthentication = true;
      PermitRootLogin = "no";
      # Automatically remove stale sockets
      StreamLocalBindUnlink = "yes";
    };
  };


  networking.firewall.allowedTCPPorts = [ sshPort ];
}