Download https://docs.google.com/open?id=0B6fzXeHwR9miTUFBWmwyc2tNcHc

Connect your Kobo Wifi to your computer and select “Manage Library”

Copy the downloaded KoboRoot.tgz file to the .kobo folder on your Kobo

Eject your Kobo and wait for it to reboot

Wait about 20 seconds after the home screen boots, until you see the blue LED flash a few times. (make sure you're connected to wifi. If you're not, connect now and then reboot your device.)

Connect your Kobo to your computer again, and now look inside the .kobo folder for a file named ip.txt. This has your Kobo's IP address.

You now have telnet and FTP access!