Filtering and policing for defending against denial of service attacks on a network
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United States of America Patent
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Mar 2, 2010
Grant Date -
Jun 5, 2008
app pub date -
Dec 1, 2006
filing date -
Dec 1, 2006
priority date (Note) -
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Abstract
Described are computer-based methods and apparatuses, including computer program products, for filtering and policing for defending against denial of service attacks on a network. A data packet is filtered by a multi-tiered filtering and transmission system. Data packets matching the first tier filter are discarded. Data packets matching the second tier filter are transmitted to an output module based on a criterion. Data packets in the third tier filter are hashed into bins and data packets matching an entry in the bin are transmitted to the output module based on a criterion for the bin. Data packets in the fourth tier transmission system are transmitted to the output module based on a criterion. Data packets that do not meet the criterion for transmission to the output module are transmitted to an attack identification module which analyzes the data packets to identify attacks.
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