Upgraded from 10.04 to 12.04, Wii-U suddenly can't connect.

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http://ubuntuforums.org – I have a PC acting as a firewall and router, using iptables. We have a Wii-U inside the network and until a few days ago, it was able to connect to the internet just fine. I upgraded the firewall PC from 10.04 to 12.04 and suddenly the Wii-U cannot connect. I do an internet connection test in the Wii-U and it passes but it can't connect to any services such as Hulu, Netflix, the Nintendo e-shop channel or anything else. I have no rules in place restricting the Wii-U at all. I do a grep in syslog for the Wii-U's IP and nothing comes up. I also have several PC's, three Android devices, two Ni (Hardware)