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Beyond the perimeter: the need for early detection of denial of service attacks

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3 Author(s)
Haggerty, J. ; Liverpool John Moores Univ., UK ; Qi Shi ; Merabti, M.

The threat to organisations from network attacks is very real. Current countermeasures to denial of service (DoS) attacks rely on the perimeter model of network security. However, as the case study and analysis in this paper make apparent, the perimeter model, which relies on firewalls and intrusion detection systems, is unable to provide an effective defence against DoS attacks. Therefore, there is a need for a new approach; one that identifies an attack beyond the perimeter. We present such an approach. We achieve early detection of DoS attacks by the identification of traffic signatures which indicate that an attack is underway. As these signatures can be identified 'outside' the perimeter, appropriate measures can be taken to prevent the attack from succeeding. We use examples of DoS attacks and a case study to demonstrate the applicability of our approach.

Published in:

Computer Security Applications Conference, 2002. Proceedings. 18th Annual

Date of Conference: