{
  pkgs,
  config,
  ...
}: let
  psCfg = config.pub-solar;
in {
  config = {
    services.openssh.knownHosts = {
      "cloud.pub.solar".publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIABPJSwr9DfnqV0KoL23BcxlWtRxuOqQpnFnCv4SG/LW";
    };

    systemd.services.ssh-tunnel-cloud-pub-solar = {
      unitConfig = {
        Description = "Reverse SSH connection to enable backups from IPv4-only to IPv6-only host";
        After = ["network.target"];
      };
      serviceConfig = {
        Type = "simple";
        ExecStart = "${pkgs.openssh}/bin/ssh -vvv -g -N -T -o 'ServerAliveInterval 10' -o 'ExitOnForwardFailure yes' -R 127.0.0.1:22022:localhost:22 root@cloud.pub.solar";
        User = psCfg.user.name;
        Group = "users";
        Restart = "always";
        RestartSec = "5s";
      };
      wantedBy = ["default.target"];
    };
  };
}