dhananjoy chowdhury Sun, 10/04/2009 - 06:44
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IDS (Intrusion detection systems) does intrusion detection and generates alerts.

IDP (Intrusion detection and Prevention system) detects intrusions and also prevents them, it also generates alerts.

Collin Clark Mon, 10/05/2009 - 05:49
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IDS checks traffic flows and alerts on anomalies or triggers of signatures. IPS does the same thing but it can also prevent attacks by accessing your devices and making ACL/firewall changes to block the offender. IPS is the next generation of IDS.


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