Automatically detecting malicious computer network reconnaissance by updating state codes in a histogram
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United States of America Patent
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Jun 8, 2010
Grant Date -
Jun 19, 2008
app pub date -
Feb 29, 2008
filing date -
Jul 29, 2003
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Expired
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Abstract
A detection and response system that generates an Alert if unauthorized scanning is detected on a computer network that includes a look-up table to record state value corresponding to the sequence in which SYN, SYN/ACK and RST packets are observed. A set of algorithms executed on a processing engine adjusts the state value in response to observing the packets. When the state value reaches a predetermined value indicating that all three packets have been seen, the algorithm generates an Alert.
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