Well... so would have a standard router configuration..
Hence the problem. You then also mix in all the ISP configuration and stuff they often put on top of what ever you are doing... it then just gets that much more complicated.
There are 100's if not 1000's of possible router combinations
Hence why you see the discussion as they are, and hence why troubleshooting it is difficult.
That is why Fixed Addresses, so you can set up port forwarding, is a recommended path. (Note, I said "a" not "the")
I agree that troubleshooting network issues is a royal PITA. That is why I posted in another thread that requiring UPnP, fixed IP addresses or port forwarding was going to be a support nightmare for DirecTV.
I also agree that fixed addresses make some things easier (been there, done that, not my first rodeo), but what are the circumstances that require port forwarding for VoD or TVApps?
It would certainly help if someone would clarify what must be enabled / disabled / implemented to address generic functional issues with VoD and TVApps instead of leaving customers to flounder around looking for solutions. I am not having problems, but clearly, a lot of people are.