COD: Warzone - Yup, another one!

[Oranjbox]

I've scowered the forum posts and documentation. I've seen a lot of posts indicating how to resolve issues with 1 to 2 machines, however I've got around 40 machines that operate in a LAN center that are licensed for COD: Warzone. Often times multiple machines will need to connect to Warzone at the same time. We are running across a situation were only a handful of them will connect.

I've tried enabling the uPnP plugin. This has helped with other game titles that we license but not COD.

I've tried following guides like the one here by Koldnitz: https://forum.opnsense.org/index.php?topic=19894.0

Most of these seem fine for 1 or two machines. But what about if we have say 15 going at once. And it could be any 15 of the 40 in service?