I think if you designate your laptop's IP as the "DMZ Host" it will allow AH to run over UDP as desired.
If there are some other firewall capabilities, you might have to map ports between HTC's servers and your gaming box. If you do, the ports you need to use are 2,000 to 3,500 or so inclusive. The main is tpl.hitechcreations.com, and I'm not sure about the CT.