Hi, The situation is as follows: I want to run a database that has some data about the members of our club. Our club is behind a nat that we have no control over, so I can't really see how things are set up. I've now chosen 1 particular ethernet socket that I want to connect the server with. So it's like this: external ip -> nat out of control (might be 2 or 3 routers even) -> chosen ethernet socket. Now I wanted to know what port of the external ip my traffic should go to so it gets to my wall socket. I set up a web server at my home, connected a pc to the socket of choice and made a quick browse + a few ctrl F5s while my server had wireshark running. Weird thing is that not all my http traffic goes through the same port of the external ip. With the first browse the http get and text stuff goes from/to externalIp:43158, after waiting a few seconds and refreshing it goes over 43682. Is this normal behaviour? Now I know there's some "Fortiweb" or "Fortiguard" software running somewhere in the out if control zone to disable torrent and some "illegal sites". Could it perhaps be that it randomly changes ports sometimes to make it impossible to run a server like I want to?