Ok, I know this is off subject a bit but please DO NOT setup your machine as a DMZ. You might as well not even run the firewall if you do that.

You need to:

A) Figure out what port G2 is using.
B) Route a dedicated port to your IP address through the advanced menu.

You can even do this if you're running DHCP if you only have one computer... Just get your IP as tmproff suggested and route the port to that IP.