The Ethical Hacker Network
- Educational resource on penetration testing and incident response.
- http://www.ethicalhacker.net/

Tek-Tips
- General computer security technical support forums. Selling and recruiting forbidden.
- http://www.tek-tips.com/threadminder.cfm?pid=83

SANS Institute - The Internet Guide To Popular Resources On Computer Security
- Combination FAQ and library providing answers to common information requests about computer security.
- http://www.sans.org/resources/popular.php

How to find security holes
- Short primer originally written for the Linux Security Audit project.
- http://www.canonical.org/~kragen/security-holes.html

Technical Info
- Provides plain language technical papers on security and securing organizations.
- http://www.technicalinfo.net

The Encyclopedia of Computer Security
- A complete one-source location for information security news, products, whitepapers, events, and definitions requires the use of JavaScript for navigation and display purposes.
- http://www.itsecurity.com/

comp.security Newsgroup FAQs
- Security related FAQ covering a variety of subjects.
- http://www.faqs.org/faqs/by-newsgroup/comp/comp.security.html

Ronald L. Rivest's Cryptography and Security
- Provides links to cryptography and security sites.
- http://theory.lcs.mit.edu/~rivest/crypto-security.html