Try checking the NAT type in each game on your Xbox, like in DayZ or Fallout. Sometimes the game shows a different NAT type than the Xbox settings. If it's showing strict or moderate NAT, that could be the problem.
I found the issue I changed the OPT1 name and it would not change in the config.xml so it does not bind to the new name, I set it back to OPT1 after seeing that the config.xml did not recognize this as selected for upnp section of the code and it worked.
@Chris78 Sorry to sort of resurrect this.. I went through all of the instructions , my intent was to have all traffic go through the VPN yet no luck :(
Could pfBlockerNG be the cause?
I'll admit this is a LOT of steps to go through and so much could go wrong