OK, i'm going to try to give as much information as needed. My house has two computers mine (the one with the server) is connected to my router wireless using a netgear adapter. my router internet service is through an at&t router. the second computer is hooked up by a wire, there is also a WiFi extender to boost the signal from computer 1 to computer 2 (my computer is computer 2). i have tried typing in my default gateway into my browser. i am then taken to an at&t website. i go through the process of opening the port. then i check online with a website and it says port 25565 is closed. i have tried doing this from computer 1 and computer 2 neither seem to be doing the job. Thank you please reply a.s.a.p.