The Wii console may require unrestricted access to several sites across various ports and protocols to function correctly. These addresses and ports vary, and may change in the future without notice. Many software firewalls restrict outbound access. Only if your firewall blocks outbound traffic do you need to enable this traffic:

* TCP: Allow traffic to all destinations on ports: 28910, 29900, 29901, 29920, 80, and 443
* UDP: Allow all traffic to all destinations. (Necessary for peer-to-peer connections and game play).

Please note that by allowing the traffic to the destinations listed above, you are essentially removing a significant amount of firewall protection for your network. So be careful if you decide to do this.