comp.security Newsgroup FAQs: Security related FAQ covering a variety of subjects.
How to find security holes: Short primer originally written for the Linux Security Audit project.
IT Baseline Protection Manual: Standard security safeguards for Unix, Novell, Windows NT, Firewalls, PBX, Databases, Email, ITSEC Management, Infrastructure, and ISDN.
Ronald L. Rivest's Cryptography and Security: Provides links to cryptography and security sites.
SANS Institute - The Internet Guide To Popular Resources On Computer Security: Combination FAQ and library providing answers to common information requests about computer security.
Technical Info: Provides plain language technical papers on security and securing organizations.
Tek-Tips: General computer security technical support forums. Selling and recruiting forbidden.
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.
The Ethical Hacker Network: Educational resource on penetration testing and incident response.