NetSTAT: a network-based intrusion detection system

  • Authors:
  • Giovanni Vigna;Richard A. Kemmerer

  • Affiliations:
  • -;-

  • Venue:
  • Journal of Computer Security
  • Year:
  • 1999

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Abstract

Network-based attacks are becoming more common andsophisticated. For this reason, intrusion detection systems are nowshifting their focus from the hosts and their operating systems tothe network itself. Network-based intrusion detection ischallenging because network auditing produces large amounts ofdata, and different events related to a single intrusion may bevisible in different places on the network. This paper presents anew approach that applies the State Transition Analysis Technique(STAT) to network intrusion detection. Network-based intrusions aremodeled using state transition diagrams in which states andtransitions are characterized in a networked environment. Thetarget network environment itself is represented using a modelbased on hypergraphs. By using a formal model of both the networkto be protected and the attacks to be detected the approach is ableto determine which network events have to be monitored and wherethey can be monitored, providing automatic support forconfiguration and placement of intrusion detection components.