i have an Asus RT-AC66U I just tried port forwarding port 9 and some other ports then I was going to https://portchecker.co/check to check if the ports where open witch there were not?? I also have remote web access enabled so port 8443 is open that is weird just I'm not running in double nat either I have Norton security antivirus but I have tried to disable that and the ports are still not open ?? On This Image you can see that the port is closed