How can I route SSH traffic based on a subdomain?

Question

I have a home server running ubuntu 10.04 that is running two services:

1. an SSH service
2. a dockerized gogs service

I would like to essentially reverse-proxy incoming SSH connections based on the subdomain. For instance, I'd like for ssh connections made via ssh user@mydomain.com to be forwarded to port 2222 and those made via ssh user@gogs.mydomain.com to be forwarded to port 10022.

In essence, I'd like something analogous to nginx for SSH traffic. How can this be achieved?

Answer 1

This is impossible. SSH has no notion of a Host header as is present in HTTP. The best you can do is port-based routing.