Chapter

Visualization for Computer Security

Volume 5210 of the series Lecture Notes in Computer Science pp 111-118

Large-Scale Network Monitoring for Visual Analysis of Attacks

  • Fabian FischerAffiliated withComputer and Information Science, University of Konstanz
  • , Florian MansmannAffiliated withComputer and Information Science, University of Konstanz
  • , Daniel A. KeimAffiliated withComputer and Information Science, University of Konstanz
  • , Stephan PietzkoAffiliated withComputer and Information Science, University of Konstanz
  • , Marcel WaldvogelAffiliated withComputer and Information Science, University of Konstanz

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Abstract

The importance of the Internet and our dependency on computer networks are steadily growing, which results in high costs and substantial consequences in case of successful intrusions, stolen data, and interrupted services. At the same time, a trend towards massive attacks against the network infrastructure is noticeable. Therefore, monitoring large networks has become an important field in practice and research. Through monitoring systems, attacks can be detected and analyzed to gain knowledge of how to better protect the network in the future. In the scope of this paper, we present a system to analyze NetFlow data using a relational database system. NetFlow records are linked with alerts from an intrusion detection system to enable efficient exploration of suspicious activity within the monitored network. Within the system, the monitored network is mapped to a TreeMap visualization, the attackers are arranged at the borders and linked using splines parameterized with prefix information. In a series of case studies, we demonstrate how the tool can be used to judge the relevance of alerts, to reveal massive distributed attacks, and to analyze service usage within a network.

Keywords

visual network monitoring visualization for network security large-scale netflow analysis