Portscan Detection with Sampled NetFlow

  • Ignasi Paredes-Oliva
  • Pere Barlet-Ros
  • Josep Solé-Pareta
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5537)

Abstract

Sampling techniques are often used for traffic monitoring in high-speed links in order to avoid saturation of network resources. Although there is a wide existing research dealing with anomaly detection, few studies analyzed the impact of sampling on the performance of portscan detection algorithms. In this paper, we performed several experiments on two already existing portscan detection mechanisms to test whether they are robust enough to different sampling techniques. Unlike previous works, we found that flow sampling is not always better than packet sampling to continue detecting portscans reliably.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Ignasi Paredes-Oliva
    • 1
  • Pere Barlet-Ros
    • 1
  • Josep Solé-Pareta
    • 1
  1. 1.Computer Architecture Dept.Universitat Politècnica de Catalunya (UPC)BarcelonaSpain

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