Protection

Cyber Security and Information Infrastructure Protection - - Practical measures for critical infrastructure protection, intrusion prevention and threat assessment.

Deception Toolkit - - Make your system seem to have network security bugs, and log attack attempts.

FakeBo - - Fakes trojan servers (Back Orifice, NetBus) and logs every attempt from client.

Flawfinder - - Examines source code looking for security weaknesses.

Guarded Memory Move (GMM) - - The GMM library can be used to prevent and study buffer overflows exploit.

Libsafe - - Free software (GNU license) from Bell Labs for protecting internet servers from buffer overflow attacks, one of the most commonly exploited security vulnerabilities.

Samhain - - A tool for file integrity checking that optionally can be used as a client/server application for centralized monitoring of networked hosts.

TCP Wrappers and other security tools - - This is the main FTP site for security tools and papers from Wietse Venema.

Tripwire Security Systems, Inc. - - Tripwire, file integrity assessment tool for UNIX.