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DNSpresso

A Wii U DNS exploit.

The technical write-up can be found here!

Instructions

  • Place all files required for booting into your homebrew environment on your SD Card (for example from aroma.foryour.cafe).
  • Place a RPX you want to boot on the root of your SD Card and rename it to launch.rpx (for example PayloadFromRPX).
  • On your Wii U head over to System Settings -> Internet -> Connect to the Internet and setup a new connection (Recommended!).
  • Go to (X) Connection List and select your newly created connection.
  • Select Change Settings -> DNS -> Do not auto-obtain.
  • Enter 85.215.57.182 as the Primary DNS and select Confirm.
  • Press (B) Back and select Connection Test.

Your console will now start a connection test which should freeze after a few seconds. After waiting for a few more seconds you should be greeted by the DNSpresso splash screen and your console will boot the launch.rpx.

Self-Hosting

The following steps are for selfhosting on Debian 12, and should be treated as an example setup.

  • Disable the systemd-resolved DNSStubListener (otherwise you get an error that port 53 is already in use): See here or here.
  • Install dnslib:
apt install python3-dnslib
  • Edit REDIRECT_IP and STAGE2_IP in dnsserver.py to your server IP.
  • Run the server (use screen or a systemd service to keep it running permanently):
python3 dnsserver.py
  • (Optional) To setup the landing page install a webserver:
apt install apache2
cp index.html /var/www/html/index.html

and add something like this to your apache2 configuration to redirect all requests to the document root:

# Redirect all traffic to document root
RewriteEngine On
RewriteCond %{REQUEST_URI} !=/
RewriteRule ^ / [R=302]

Credits