I've been having an issue lately and I'd appreciate it if somebody can help.
Apparently, I can't go into other people's worlds. I can get invaded fine ( have gotten invaded a bunch of times in the belfry) and I can summon other people, but whenever I try to invade someone, or drop a summon sign and try to get summoned, the game spends 2 minutes in a loading screen, and it says " the multiplayer session has disconnected" or something along those lines.
This was never a problem in Dark Souls 1, despite GFWL and the whole network being P2P based.
I don't use a router ,but I still opened up a few ports, made no difference. I can connect to the server perfectly fine and every other MP game works perfectly.
EDIT: Just tried using a Cracked Blue eye orb, and it's been in the loading screen for 5 minutes now, even though I can see that there are packets of data constantly being sent online and I have no other online app running.