What is an IDS?
Written on April 8, 2008 by editor
An IDS or Intrusion Detection System is a system that detects the misuse of network or computer resources. It uses a number of sensors to detect intrusions. Some of these may be the following: a sensor to monitor TCP connection requests, log file monitors, or file integrity checkers.
The IDS system collects data from its sensors and analyzes this data to alert the administrator if there is malicious activity on the network. It is commonly divided into NIDS (Network Intrusion Detection Systems) and HIDS (Host Intrusion Detection Systems). Newer NIDS also attempt to act as NIPS (Network Intrusion Prevention Systems). An example of an excellent open source Network Intrusion Detection System is SNORT
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