Yes but first make sure that the update servers are properly blocked because some routers do not properly filter the URL (mine don't) and some ISP does not allow you to change DNS (mine also don't )Hello all!
I have just bought a Wii U (it's on 5.3.2) and I'm in the process of configuring it to homebrew.
Is it really safe to have TubeHAX DNS + URL Filtering or shoult I go nuts and block the entire MAC address, loosing any internet possibility?
You can use your PC to try accessing the update servers, and if it can still access the server then you need to resort to other options