Guides about ssh tunnel
- How to run Syncthing on a Linux server as an always-on sync peer Turn a Linux server into an always-on Syncthing peer: official apt repository, a dedicated service user, a GUI kept on localhost, the right firewall ports, ignore patterns and key backups. Beginner 25 min
- Ports and port forwarding on a server, explained A port is reachable when a service listens on the right address and the firewall allows it. Check both, test from outside, and use tunnels instead of opening admin ports. Intermediate 15 min