configuration.nix/hosts/skipper/services/ssh.nix

_: {
  services.openssh = {
    enable = true;
    settings = {
      PasswordAuthentication = false;
      KbdInteractiveAuthentication = false;
      PermitRootLogin = "no";
    };
    hostKeys = [
      {
        path = "/persist/system/etc/ssh/keys/ssh_host_ed25519_key";
        type = "ed25519";
      }
      {
        path = "/persist/system/etc/ssh/keys/ssh_host_rsa_key";
        type = "rsa";
        bits = "4096";
      }
    ];
  };
}