Contents: Chapter 1. Intrusion Detection Systems; Chapter 2. Introducing Snort 2.6; Chapter 3. Installing Snort 2.6; Chapter 4. Configuring Snort and Add-Ons; Chapter 5. Inner Workings; Chapter 6. Preprocessors; Chapter 7. Playing by the Rules; Chapter 8. Snort Output Plug-Ins; Chapter 9. Exploring IDS Event Analysis, Snort Style; Chapter 10. Optimizing Snort; Chapter 11. A…