1.http://www.cyberxtreme.info/forum/
2.http://www.evilzone.org/
3.http://hackaday.com/
4.http://www.hackinthebox.org/
5.http://www.hackthissite.org/
6.http://www.hackforums.net/
7.http://www.opensc.ws/
8.http://www.hackhound.org/
9.http://www.crackmes.de/
10.http://www.unkn0wn.ws/board/
11.http://www.security-shell.ws/forum.php
12.http://www.binrev.com/forums/
13http://www.cyberterrorists.net/forum/
14.http://www.pakbugs.com/
