Linux: SSH tips and tricks

SSH Tunnelling

In this example I wanted to access the web interface for our cluster on port 8080 which was blocked

# ssh -L [local port]:localsystem:[remote port] remote-system
[david@localdesktop]$ ssh -L 8080:localhost:8080 bostonhpc.co.uk

Then i could point the browser at http://localhost:8080 to access the PCM console

In this example i want to create an ssh tunnel from a node in bostonlabs to viglen

[viglen@amd-quad]$ ssh -R 2222:localhost:22 david@vhpchead.viglen.co.uk

From the vhpchead node, I can then connect to my desktop node through port 2222

[david@vhpchead]$ ssh -p2222 viglen@localhost