This question has been touched on but not really solved. Here is my situation.
I have Uverse DSL with an NVG510. Directv Tech Support indicated that this modem is not supported by them to use the GenieGO Out of Home Access because it does not provide an Static IP. I called ATT and they said this is the most current modem, but I could purchase an Static IP address from them for $15/month. They also mentioned buying another router to use with the NVG 510. I do not want to spend more money. This is getting out of control and Directv will not let me return the Genie Go.
The system works fine in my house.
I used the directions on Portforward.com but Step 10 is too vague in what you need to enter.