inb4 trading board for DeviceID.bin and CTCert.bin
It's literally rewriting ACT's code.bin to route everything to a local IP and then having everything go through Fiddler, then have that change the data sent to the server. Kinda naive and could be done way better, but I can't do anything with my 3DS anymore since Nintendo Support updated it.I've wondered about the method @ariankordi supposedly uses if that's the one you're referring to.