Real-Time Network-Based Anomaly Intrusion Detection

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Ravindra Balupari
Brett Tjaden
Shawn Ostermann
Marina Bykova
Aaron Mitchell

Abstract

The global internet has made computer systems world-wide vulnerable to an ever-changing array of attacks. A new approach to perform real-time network-based anomaly intrusion detection is presented in this paper. Real-time Tcptrace generates data streams which are analyzed to detect network-based attacks. Real-time Tcptrace periodically reports statistics on all the open TCP/IP connections in the network. Then, using the Abnormality Factor method, statistical profiles are built for the normal behavior of the network services. Abnormal activity is then flagged as an intrusion. This approach has the advantage of being able to monitor any service without the prior knowledge of modeling its behavior. The paper presents interesting results and evaluation of the approach by conducting experiments using the MIT Lincoln lab evaluation data.

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Section
Special Issue