Was playing Blops 2 last night and we all had moderate/strict NAT types and couldn't lobby up. Had a look today and managed to get mine open.
Go to Link ---------> http://portforward.com/english/routers/port_forwarding/
Select your router brand from the list.
Select router model.
Select game.
Follow instructions.
When that's done, follow this
Job done
Go to Link ---------> http://portforward.com/english/routers/port_forwarding/
Select your router brand from the list.
Select router model.
Select game.
Follow instructions.
When that's done, follow this
Job done