Underrated comment. Well executed.

But like why are we paying them to buy shit from the military industrial complex?

Ya agreed. I never let my cats or kid play with things that can easily kill them.

Seconded. I've had two a 2750dw and recently upgraded to a 2550dw for mfp functionality. Never had an issue. Toner lasts forever only ever replaced two. They just work and cost very little to operate.

I'm interested

Can you draw a diagram? It kind of sounds like you need either NAT or VPN or a combination of the two.

I agree with the double nat on the adsl side. If you have a private IP and still have internet it's behind a NAT. You need a public IP on the top right. When you say forward traffic what type of traffic is being sent? Do you want it relayed or are you ingesting it and manipulating it in some way? I guess what is the server in top left doing with it before it goes to game server at top right? A simple route would pass this traffic from server to game server at the routing level.