tagaya.wup.shop.nintendo.net
If an update comes out after you have blocked that address, your Wii U will NEVER know about it. However, if your Wii U already knows about an update before you block that address, it will still know about it, even after blocking it.
Does the same hold true for game updates? If I block that URL will I be notified if a game has an update when I launch it? Also, what are the disadvantages, if any, of your Wii U knowing that there is an available system update?