Chapter 5
Intrusion-Detection Systems
Chapter Objectives
After reading this chapter and completing the exercises, you will be able to do the following:
Explain how intrusion-detection systems work.
Implement strategies for preventing intrusion.
Identify and describe several popular intrusion-detection systems.
Define the term honeypot.
Identify and describe at least one honeypot implementation.
Introduction
Chapter 4, “Firewall Practical Applications,” discussed several firewall solutions that have built-in intrusion-detection systems (IDS). An IDS is designed to detect signs that someone is attempting to breach a system and to alert the system administrator that suspicious activity is taking place. A permutation of the IDS is the intrusion-prevention ...
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