Datamation: "However, open source security tools do offer a great deal of flexibility � not to mention cost advantages. If you want complete control over the way your network functions, having access to the source code gives you that ability.
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.