Date Added: Jun 2010
Monitoring is crucial both to the correct operation of a network and to the services that run on it. Operators perform monitoring for various purposes, including traffic engineering, quality of service, security and detection of faults and mis-configurations. However, the relentless growth of IP traffic volume renders real-time monitoring and analysis of data a very challenging problem. In this paper, the authors introduce Crosstalk, a scalable and efficient distributed monitoring architecture that uses cross-protocol correlation to detect network anomalies. While applicable to a wide range of applications such as botnet detection, spam mitigation and mis-configurations, they pick a point in this application space, concentrating on VoIP attacks.