You can port forward it via here: http://www.portforward.com/efficient/5200.htm (sorry but I think it's windows instructions so make the most of it you can.)

In the meantime I'll see if I can find anything out about your isp blocking p2p.

Here's some other links I found re: 5200
http://text.dslreports.com/faq/eff#4

http://text.dslreports.com/faq/8472

http://forums.speedguide.net/showthr...73#post1520273

http://text.dslreports.com/faq/8472