Yeah some routers it seems are smart (or dumb) enough to ignore the null byte traffic. You have to send something explicit, like @@ or whatever the game's keepalive command is.
Yay I finally managed to get it running! Now to learn how to actually /use/ it!
Good progress with Ares; keep it up, @faraday!
@lithium Just to note, in Evennia (which Arx uses), you can send the
idlecommand as a keepalive.
Edit: I see this answer was already given. Ah well. :)