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Great tutorials on praticing security

[ Hack This Site] 

Is a free, safe and legal training ground for hackers to test and expand their hacking skills. More than just another hacker wargames site, it's a living, breathing community with many active projects in development, with a vast selection of hacking articles and a huge forum where users can discuss hacking, network security, and just about everything. Tune in to the hacker underground and get involved with the project.

This site has the following missions
  • Basic missions
  • Realistic missions
  • Application missions
  • Programming missions
  • Extbasic missions
  • Javascript missions
  • Stego missions
  • IRC missions
http://www.hackthissite.org/

Pros
  • a safe way to practice your knowledge

Cons
  • Must be online in order to use this
  • Must create an user account. 

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[  OWASP ]

The Open Web Application Security Project (OWASP) is a not-for-profit worldwide charitable organization focused on improving the security of application software. Our mission is to make application security visible, so that people and organizations can make informed decisions about true application security risks. Everyone is free to participate in OWASP and all of our materials are available under a free and open software license.

OWASP WebGoat Project

An online training environment for hands-on learning about application security. WebGoat is a deliberately insecure J2EE web application maintained by OWASP designed to teach web application security lessons. In each lesson, users must demonstrate their understanding of a security issue by exploiting a real vulnerability in the WebGoat application. For example, in one of the lessons the user must use SQL injection to steal fake credit card numbers. The application is a realistic teaching environment, providing users with hints and code

http://code.google.com/p/webgoat/downloads/list - Here's the link to download the application.

When downloading the webgoat click on the "WebGoat-OWASP_Standard-5.3_RC1.7z" like seen in the screenshot below.


Pros
  • It's free
  • Can be download for for offline use
Cons
  • None

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