LISA '07 – Abstract
Pp. 141–152 of the Proceedings
ATLANTIDES: An Architecture for Alert Verification in Network Intrusion Detection Systems
Damiano Bolzoni, University of Twente, The Netherlands; Bruno Crispo, Vrije Universiteit, The Netherlands & University of Trento, Italy; Sandro Etalle, University of Twente, The Netherlands
We present an architecture designed
for alert verification (i.e., to reduce false positives) in network
intrusion-detection systems. Our technique is based on a systematic
(and automatic) anomaly-based analysis of the system output, which
provides useful context information regarding the network services.
The false positives raised by the NIDS analyzing the incoming traffic
(which can be either signature- or anomaly-based) are reduced by
correlating them with the output anomalies. We designed our
architecture for TCP-based network services which have a client/server
architecture (such as HTTP). Benchmarks show a substantial reduction
of false positives between 50% and 100%.
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