Free tutorials on IT Security

Hello  I would like to present some free issues from www.hakin9.org whih is one of the biggest IT Security online magazines in the world!

Here are some free issues which you may find interesting:

How to exploit Android with metasploit? Defending layer 2 attacks, and how to make sure that your Wordpress site is not exposed to any hack attack?
http://hakin9.org/the-guide-to-backtrack/

Metasploit's secrets on 180 pages
http://hakin9.org/metasploit-tutorials-compedium/

Why is NMAP so efficent? How to use it properly for your purpose?
http://hakin9.org/nmap-guide-revisited/

How to exploit SAP? Practical guidance
http://hakin9.org/a-guide-to-sap-exploit-2/

HTML hacking, How to perform MITM attack - step by step
http://hakin9.org/advanced-web-attacks-and-exploitation/

Last but not least - a beginner's guide to software exploitation
http://hakin9.org/software-exploitation-starter-kit/

Also featuring:

Basic rules and info for beginners
http://hakin9.org/hacking-for-beginners/

More advanced techniques
http://hakin9.org/hakin9-offensive-programming-for-authors-and-friends/