I tried both hole punching and fixed source ports - they work - but only the 2nd player can connect, the rest can't connect at all.
I used to be able to host 2v2 and above, now I can only host 1v1.
Anyone got suggestions on how to fix it?
Bear in mind that I have a "nazi" router that doesn't even have a Port-opening option, so don't tell me to open ports
