I am setting up my OPT1 port as a dedicated port for my Xbox 360 with Live. I've followed the instructions to get DHCP working, which works, and some extra instructions to enable UPnP only for the Xbox, and a few NAT rules.
The Xbox reports that it gets the IP I assigned to it in the DHCP server, and the Firewall's IP as primary and only DNS server. It then reports that it cannot resolve the Live servers in the DNS.
Is there another firewall rule I should add to open DNS for the OPT1 port? Or any ideas?