So I've been trying to get this working for some time now. I have tried editing the registry to change the port, I've tried changing the port in chaoslauncher, but I still lag when me and him and at least 1 random person on battle.net try and play. I've google searched and haven't really found anything. Any help would be awesome!

Can't be done.

If you had two separate internet connections (e.g. steal someone's wifi) that would work, but otherwise you can't do anything about it

yeah i had this problem too. I tried everything and the only thing we could do was join games hosted by other people.

yep. It happens. Another strange thing is that you can't see the chat the other person on your internet connection types. Me and my bro always used to have problems with it because he would get on while i was already on, and I would dc from the game i was in.

There has got to be a work around. Ill look a little deeper into it and let you know what I find.

No, there isn't.

Me and my brother are having a similar problem. We can play just fine together if it's just the two of us; but no matter whether I host or someone else hosts, any other player involved causes ENORMOUS lag. As in, so bad that a reaver would take five years to traverse fifteen tiles.

Reavers already take that long ;o

What I've noticed is that the port changing fixes it so that if you both join the same game, you don't lag, but when joining one another's games, you still do.