Interpreting Network Traffic: A Network Intrusion Detector’s Look At Suspicious Events

The purpose of this paper is to discuss interpretations of selected network traffic events from the viewpoint of a network intrusion detection analyst. I assume the analyst has no knowledge of the source of the event outside of the data collected by his network-based intrusion detection system (NIDS) or firewall logs. I do not concentrate on the method by which these events are collected, but I assume it is possible to obtain data in TCPDump format.

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