This is something i did not realised that can be done. My friends and i were playing in a Arma 3 server a few days ago, and 3 of them had problems conecting to the server due to very high packet loss, so out of the "im out of ideas lets try this" i did a firewall rule to dstnat all the ports needed to the server IP and they conected to my ip instead of the server. To my suprise this worked, and perfectly.
I never had time to check but how this works? I suspect that by doing this the router acts as a "proxy": Client<->My Router<->Server. It is like this?