Linux Administration Cookbook

How it works...

When you add the -D option to SSH, or add the DynamicForward option to your SSH config file, you're telling SSH that you want to specify a port on your local side that will forward any requests received to it over your SSH connection.

Let's break down our commands:

[vagrant@centos1 ~]$ ssh -f -D9999 192.168.33.11 sleep 120

First, as we did previously, we've used -f and sleep to keep a connection open, while dropping us back to the centos1 prompt once a connection is established:

-f ... sleep 120

We've also specified our -D option, with a randomly chosen port:

-D9999

I use 9999 through force of habit, but occasionally I mix it up a bit by using 7777, or even 6666 if I'm feeling really wild. You may use whichever port you wish ...