Hi guys!
This problem drives me insane.
Didn't have problems before I moved and got a new PC.
Could allways open a coop game via Doomseeker or connect [IP].
But now it just doesn't work.
Forwarded ports of course!
(UDP 5029 and 10666).
"connecting..." just repeats in the console. Nothing happens.
Should join immediately.
WEIRD THING is:
I can join another friend online (but he has a very bad connection, so lag-galore on huge maps!)
but not others
and they can't join me!
I don't know anymore.
ANY OTHER GAME on Steam (etc) has no problems creating or joining a coop-game!!!
It's really annoying, especially when I tried to introduce some people into Doom who did never play it in coop.
But its things like these, that scare off potential newcomers!