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CCIE Security Exam Certification Guide by Henry Benjamin

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Intrusion Detection System

Intrusion detection systems (IDS) are designed to detect and thwart network attacks. Based on their location, they can be either of the following:

  • Network IDS— Examines or sniffs every packet flowing across the network and generates an alarm upon detection of a network attack signature.

  • Host IDS— Examines operating system information such as logs or system process, against a base line. When the system deviates from the normal values because of an attack, alarms are generated.

Chapter 6 defines some of the intrusion detection mechanisms you can use in an IP network, namely NetRanger.

Cisco IDS delivers a comprehensive, pervasive security solution for combating unauthorized intrusions, malicious Internet worms, and bandwidth ...

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