1) Fixed 2) This is kinda the hard part because it depends on where you are hosting it. If you ping your Sandcats address, does it return the IP of your server

1) Fixed 2) This is kinda the hard part because it depends on where you are hosting it. If you ping your Sandcats address, does it return the IP of your server/location? Is there a firewall, router, etc. you may need to open a port or forward a port? Agreed that the parent posts suggest this should be easier. It really probably should, but it's hard to do that securely without depending on some outside service. Sandcats and Let's Encrypt removes a lot of difficulty but CGNAT and port forwarding and stuff might be best defeated by autoconfiguring something like Tailscale or Cloudflare Tunnel.