Are you trying to access some harmless website that is blocked by your IT? Frustrating, isn't it? Well, read on, because this guide will open all the doors for you.
Please note, I assume that you already have an SSH server that you can connect to from outside world.
For the purpose of this article, I'm connecting to example.com on port 443. I'm using port 443 since all firewalls and proxies have this port open for ssl connections.