Farsight Passive DNS sensors collect DNS response data received by caching, recursive DNS servers distributed around the Internet. This data, which does not contain personally identifiable information, is aggregated and made available via the Farsight Security Information Exchange (SIE) platform where it is imported into Farsight DNSDB, the world's largest passive DNS historical database. Operating a Farsight Passive DNS sensor supports anti-abuse research and enables the creation of better, more robust anti-abuse tools.
The passive DNS sensor only collects the DNS data received by a caching server as the result of recursion, so no Personal Identifiable Information (PII) is included. In fact, the Farsight platform was designed from the very beginning with privacy in mind. Our privacy-by-design approach means end-user queries cannot be seen by our sensors.