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Detecting Intruders Using a Long Connection Chain to Connect to a Host

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2 Author(s)
Wei Ding ; Dept. of Comput. Sci., Univ. of Houston, Houston, TX, USA ; Huang, S.-H.S.

A common technique hackers use to break into a computer host is to route their traffic through a chain of stepping-stone hosts. There is no valid reason to use a long connection chain for remote login such as SSH connections. One way to protect a host of being attacked is to identify long connection chains connecting into the host. This paper proposes a novel method to identify long connection chains from short chains using a pre-computed short chain profile. Each new connection will be compared to the profile. Any connection that differs significantly from the profile will be considered as a suspicious long connection. Several methods are used to adjust with user's different typing speed. Validation results show that more than 80% long chains can be correctly detected for chains of length 4 or higher.

Published in:

Advanced Information Networking and Applications (AINA), 2011 IEEE International Conference on

Date of Conference:

22-25 March 2011

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