Use caddy to proxy ssh

[francislavoie]

@ZegWe

1. Caddy version (caddy version):

latest

In your docker-compose.yml, you have caddy:2.4.3. That’s not the latest. The latest is 2.4.5. Please upgrade!

@ZegWe

I’m trying to use caddy as a proxy of ssh, but it didn’t work when I using ssh -p 443 user@ssh.xxx.xx,

As @benatkin has said, this won’t work with vanilla Caddy. Caddy is an HTTP server and proxy, but SSH is not HTTP, it’s communication over TCP.

The caddy-l4 plugin adds support for proxying TCP/UDP, but does not have Caddyfile support at this time, so you’d have to use a JSON config. If you have other HTTP sites you still need to serve, you can run caddy adapt --pretty to adapt your Caddyfile to JSON, then augment your JSON config with what you need for caddy-l4.