Port forwarding and Diablo III: is it real?

Question

Computer networks

Internet I have through a proxy (Microsoft ISA which). On Windows, in order for all the programs to drive traffic through it, there is a special ISA Firewall Client client.
I have a poppy, there is no such garbage for a poppy, this time. Even worse is that on this proxy all ports are closed except for 80 and 443 and for the gabber.
The question is - is it really possible for me to play Diablo III somehow (here we substitute anything that uses non-HTTP ports)?
There was an idea to put a package redirect on some hosting and run it on port 80, for example. But I do not know if there is something similar and if it is possible. Who knows software for Linux that would transfer all requests from its port to another ip: port or how to do it in iptables?
There are 20 minutes left before the launch of the bet, and here such crap.

Answer 1

OpenVPN on the 80th (443rd) port on an external machine and what's stopping you from walking through it?

Answer 2

As an offtopic: why is it so eager to beta? The full version will be released and let's kill the summer to fight the demons.