An Introduction to Learning About Network Security from isc.sans.org

Useful sites for security professionals:

• A Taste of Computer Security from kernelthread.com, very good introduction to computer security
• CVE Common Vulnerabilities and Exposures: maintains a list of standardized names for vulnerabilities and other information security exposures
• OSVDB: Open Source Vulnerability Database
• CERT Computer Emergency Readiness Team, center of internet security expertise at Carnegie Mellon University , current alerts
• CISSP Core Principles
• bugtraq The full disclosure security list
• uniras.gov.uk UK's National Infrastructure Security Co-ordination Centre (NISCC)
• sans.org: current port activity, resources, Top 20 Vulnerabilities
• Linux-Sec.net Many, many links and resources, thorough and detailed!
• Netcraft: web statistics, server detection, server monitoring, information and more
• Phrack: Hacking site with detailed code examples and explanations, serious hackers only
• L0T3K: good resources and examples