Forums For Hackers And Security Professionals

Just like any other area, forums are really great help for learning from other experts. Hundreds of security experts and ethical/non-ethical hackers are willing to share their knowledge on forums for some reason. Please keep in mind to do enough research before post a question and be polite to people who take time to answer your question. 

1. Stackoverflow for security professionals
2. http://darksat.x47.net/
3. http://forums.securityinfowatch.com/
4. http://forums.cnet.com/spyware-viruses-security-forum/
5. http://www.hackforums.net/forumdisplay.php?fid=47