I read your post twice and can't see why we need port forwarding. Sometimes an app needs broader access but I don't see what is causing the need to port forward so I can't offer alternatives.
As to the firmware update, many of the ISP supplied models are "special." Back to the ISP which supplied it for instructions on how to update.
Help, my PC with Windows 10 won't shut down properly
Since upgrading to Windows 10 my computer won't shut down properly. I use the menu button shutdown and the screen goes blank, but the system does not fully shut down. The only way to get it to shut down is to hold the physical power button down till it shuts down. Any suggestions?