#1
Hardware required
ADB Broadband DA 2210
Ethernet Cable

Software required
SmartSniff v2.29 - http://www.nirsoft.net

Tutorial
1 - Start by pluging in a Ethernet cable from your computer to port ETH1 of the router.
2 - Start SmartSniff v2.29
3 - Open your browser on http://adsl.setup/ui/skin
4 - Start capturing packets in SmartSniff
5 - Click on "Save" in Wifi network
6 - Go to SmartSniff and File > Save Packets data to file > dump.txt
7 - Open dump.txt and look for passphraseB64