Temporary port forwarding

Question

For family tech support hell (tm) I'm getting into ssh.

My plan:

• Forward port 5022 to 5022 in router.
• them@theircomputer$ ssh -L 5022:localhost:22 localhost
• me@mycomputer$ ssh -p 5022 them@theircomputer

Result: ssh: connect to host theircomputer port 5022: Connection refused

It seems obvious ssh tunneling is supposed to tunnel requests not listens.

I don't want to give them ssh access to my system to set up a reverse tunnel that way.

I don't want to forward port 5022 to port 22 and I don't want to make ssh listen to port 5022 permanently (For security)

How do I temporarily forward port 5022 to port 22 on a system? (Preferably in a short oneliner!)

Answer 1

A bit more googling lead to the ssh flag -g

    -g      Allows remote hosts to connect to local forwarded ports.