For introductory courses in Network Security; also appropriate as a supplementary text to a general information course in Networking.

This text solves the need for a resource that illustrates the principles underlying security technology, as well as provides complete hands-on exercises for the laboratory. Based on open-source software, this text is oriented toward the first-time networking student. Progressive, practical exercises build confidence; SOHO (small-office-home-office) users will also be impressed with the information provided in the text, as for these users the affordability of open-source solutions can be critical.