Free - Computer Security Tools Book

"Open Source Security Tools: A Practical Guide to Security Applications"

Few frontline system administrators can afford to spend all day worrying about security. But in this age of widespread virus infections, worms, and digital attacks, no one can afford to neglect network defenses.

Written with the harried IT manager in mind, Open Source Security Tools is a practical, hands-on introduction to open source security tools. Seasoned security expert Tony Howlett has reviewed the overwhelming assortment of these free and low-cost solutions to provide you with the “best of breed” for all major areas of information security.

By Tony Howlett. Published by Prentice Hall. Part of the Bruce Perens' Open Source Series.

Offered Free by: informIT

A 600-page PDF, written in 2004, which still contains useful information.