I installed DNSQuerySniffer v1.35 on a Microsoft Windows Professional system which has been generating a lot of unusual DNS and HTTP traffic even when the owner of the system is not using the system. E.g., I've seen a lot of such traffic overnight, far more than can be accounted for by normal processes running and checking on available updates, etc. And the websites being contacted are not ones I would expect to be contacted. DNSQuerySniffer allows the DNS queries and responses from DNS servers to the system on which the software is installed to be monitored and captured for later analysis.
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