Like rottydaddy, I have a set of utility pages that come up when I type in the IP of the wired network DSL modem (Actiontek) in my browser's address bar. Setting up ports and such is right there as one option.
Have you tried calling your ISP tech support? Just to be certain I had done it all correctly with my DSL modem, I called my provider to check. They stepped me through what I needed to do on the phone.... no charge. We confiermed that I had it all set up correctly.
best,
......................john

Intel i7 960 quad 3.2G LGA 1366, Asus P6X58D Premium, 750W Corsair, 6 gig 1600 DDR3, Spinpoint 1TB 720