Hi Guys. I'm a newbie in the world of vpn. I use AirVPN from a PC, it works well. But I can not get it to work from my Zyxel Nas326. In particular from the Transmission app. I made a forward of a door to be assigned to the app and so far everything is OK, the door is set correctly. I enter it in the Transmission configuration but it does not work properly and the "door closed" warning appears. Any help to configure the nas? Thank you in advance.