How do I remove an SSH forwarded port

If you are using Linux you can kill the process by:

ps aux | grep ssh

and then use

kill <id>

To kill the process.

If the kill command is not successfull you can try

kill -9 <id>

How to cancel a forwarded port in an already running SSH session:

1. Press ~+C (tilde + capital C)
2. Type -KL 10002 (or whatever port number)
3. Press Enter

You should see this:

ssh> -KL 10002
Canceled forwarding.

You can enter an interactive console by typing ~C (capital "C"). This lets you dynamically add and remove port forwardings (among a few other things).

This sequence has to come right after a carriage return/newline. So in doubt, just type Enter~C (in sequence).

If you don't see the characters appear on the console, you're doing it right :)

You should now see an ssh> prompt.

To remove the port, simply enter -KL 10002 followed by Enter (where 10002 is your forwarded port).

The inverse - adding a new forward - can be done like this (from start to finish):

Enter~C

ssh> -L 10002:192.168.0.30:10002

Enter

You could use the "escape-key" (usually ~) followed by C to get a cli to your connection. You can from there remove tunnels without taking down your connection.