WHITE LISTING DNS TOP-TALKERS
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United States of America Patent
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Issued Date -
Feb 14, 2013
app pub date -
Aug 10, 2012
filing date -
Aug 11, 2011
priority date (Note) -
Abandoned
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Abstract
Systems and methods for creating a list of trustworthy resolvers in a domain name system. A computer receives a resolver profile for a resolver sending queries to a domain name server. The resolver profile is based on one or more of a top-talker status of the resolver, a normalcy of distribution of domain names queried, a continuity of distribution of query type, and an IP time-to-live variance of queries from the resolver. Resolver profiles can be compared to a trust policy to determine whether the resolver is trustworthy. Resolvers deemed trustworthy can be added to a list of trustworthy resolvers. Embodiments can detect the occurrence of a network-based attack. Embodiments can mitigate the effect of a network-based attack by responding only to queries from resolvers on the list of trustworthy resolvers.
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