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  1. Proceedings of the 2007 ACM workshop on Quality of protection (QoP '07)
  2. Implementing and testing dynamic timeout adjustment as a dos counter-measure
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Effect of static analysis tools on software security: preliminary investigation
An algorithm for the appraisal of assurance indicators for complex business processes
Implementing and testing dynamic timeout adjustment as a dos counter-measure
AMBRA: automated model-based risk analysis
Model-based assurance of security controls
Measuring up: how to keep security metrics useful and realistic
Improving vulnerability discovery models
Towards a taxonomy for information security metrics
Defining categories to select representative attack test-cases
Toward measuring network security using attack graphs
A technique for self-certifying tamper resistant software
Quantitative software security risk assessment model
Program obfuscation: a quantitative approach

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Implementing and testing dynamic timeout adjustment as a dos counter-measure

Content Provider ACM Digital Library
Author Fernandez, Jose M. Boteanu, Daniel Reich, Edouard McHugh, John
Abstract In this paper we experimentally analyse various dynamic timeout adjustment strategies in server queues as potential counter-measures against degradation of service attacks. Previous theoretical work studied the relative performance of both coarse-grained threshold-based timeout and fine-grained adjusment strategies where the timeout value is adjusted as the number of connections in the queue varies. In addition, two methods for removing timed-out connections were explored: the deterministic method where the expiry time is determined at connection arrival depending on the timeout value at that moment, and the deferred method where connections are continuously polled and flushed when the time-in-queue is larger than the current timeout value.We report on experiments performed on a lab network where these strategies were tested against various configuration and attack parameters. The experimental results confirm the conclusions previously obtained from mathematical modelling and simulation, i.e. that a) finer-grained dynamic adjustment performs better than coarse-grained or no adjustment, and b) that the deferred method performs better than the deterministic one. Furthermore, our implementation of these counter-measures is very efficient and transparent with respect to the servers and applications it tries to protect. It could therefore be easily integrated into existing OS and applications or implemented in separate network devices, either on dedicated machines or network appliances.
Starting Page 34
Ending Page 39
Page Count 6
File Format PDF
ISBN 9781595938855
DOI 10.1145/1314257.1314269
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2007-10-29
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Syn flood Degradation of service Denial of service
Content Type Text
Resource Type Article
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