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Opt Out of Data Collection

  • Updated
Censys strives to be a good citizen of the security industry. We never attempt to log in to any service, read any database, or otherwise gain authenticated access to any system.

Can I opt out of Censys data collection?

Censys scans help the scientific community accurately study the Internet. The data Censys gathers is sometimes used to detect security problems and to inform operators of vulnerable systems so that they can be fixed. If you opt out of data collection, you might not receive these important security notifications.

If you wish to opt out, you can configure your firewall to drop traffic from the subnets we use for scanning:

  • 162.142.125.0/24
  • 167.94.138.0/24
  • 167.94.145.0/24
  • 167.94.146.0/24
  • 167.248.133.0/24
  • 199.45.154.0/24
  • 199.45.155.0/24
  • 2602:80d:1000:b0cc:e::/80
  • 2620:96:e000:b0cc:e::/80

Additionally, our HTTP-based scans use a Censys-specific user agent, which can be used to filter requests from our scanners.

Mozilla/5.0 (compatible; CensysInspect/1.1; +https://about.censys.io/)

Configuring your services to drop connections from Censys’ subnets will prevent our scanners from indexing your services. Historical data is not removed from Censys data sets as part of this change. Host and virtual host services are typically pruned from Censys Search within 24-48 hours of their last observation timestamp.

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