{
  services.openssh = {
    enable = true;
    settings = {
      PermitRootLogin = "no";
      PasswordAuthentication = false;
      KbdInteractiveAuthentication = false;
      AuthenticationMethods = "publickey";
      PubkeyAuthentication = "yes";
      ChallengeResponseAuthentication = "no";
      UsePAM = false;
      X11Forwarding = false;
    };
  };
}