Plutonium

Resxt Did you read the post? Properly opening 3074 was not enough, yet 4379:4380 fixed it immediately. If you don't have an actual answer don't reply.

I've been having issues hosting for friends for a while, even though I have forwarded the port specified in the Pluto doc about it (3074 UDP)
I've opened ports before (have hosted working dedicated servers for Counter Strike Source, TF2) so I don't believe my knowledge about port forwarding itself is off.
I've read about a LOT of different ports besides 3074 when it comes to T6 hosting so I have no clue if there are additional ports, or those are outdated, etc.
(also, does the list of ports for BO2 provided in Activision's site apply to T6 too?)