Lock Down firewall from rest of internal network

[tomdaley92]

Disable establishment of outgoing connection establishments from games.diesel.net to the rest of my internal network

subnet: 192.168.50.1/24

There might be some issues with this but I can't think of any reason why the games VM needs to make requests to anything other than the internet.

As long as clients "establish" a connection by reaching out to games.diesel.net, it can still talk back out to someone on the internal network (could be a valid valheim player right?)