What does ttyUSB mean? Sometimes, the embedded microcontroller does not come with a hardware USB interface. While it is possible to use a software-only USB stack, the additional constraints put onto the CPU and the usually small storage size often lead board designers to include a dedicated UART to USB bridge.
Because of a busy weekend I didn't really follow up other than via emails and this still hasn't been resolved. The consistent word from them was that porting a number sometimes takes 24 to 48 hours.. I spoke to a rep by phone today who promised it would be done within 2 to 4 hours.. It wasn't.
Re: Port Forwarding not working. I'm running an online game and I'm of course the hoster. When I open the game application, it automatically opens the ports the app requires (7171 an 7172) and after 5 minutes, port 7171 closes by itself, then after 50 minutes it would randomly open.