strange, lately i've been having jj2 internet problems too. When i host normally everything is fine, but in the last few weeks my internet access has been irratic and sometime when i host, no one sees me (this is the first time it's happened so i dont know much about it). Now in the last week whn i try and join a server i dont even get to the screen where it shows how many are up, it just pings constantly. The only way sometimes is to use programs such as jazztool which is an artificial jj2 launcher which might help.

Furthermore a tip you should do is go to your internet service provider. Mine is Cogeco so therefore I have a icon in my system tray. But if you dont have an icon, just get their phone number and contact them about opening ports 10052 and 10054 or 10052 to 10054(double check these forums to make sure so you dont mess anything up).

Lastly i wish you the best of luck