Explains how to use 100 plus software tools for auditing systems on a network, auditing a network, and investigating incidents. The authors also overview some of the most common hacking programs used in attacks, and how to detect them on a system. Topics include port scanners, vulnerability scanners, password crackers, and war dialers. Among the specific products described are Netcat, Nessus, Tripwire, John the Ripper, and the Forensic Toolkit. The CD-ROM contains demonstration and open source security tools.