Passive DNS

Collection, storage, and analysis of historical DNS data.

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Basic features

The service collects and stores historical DNS mapping data. Users and automated services can access the results via a web portal and JSON REST API.

This service helps detect masked attackers on the network by providing access to historical DNS resolution records. It aids in incident investigation, identifies non-bidirectional translations, uncovers similar addresses that might be used for phishing, and detects anomalies in name translations.

Extensive database

The service is primarily designed for organizations connected to the CESNET e-infrastructure, particularly for network and service administrators as well as security team members. Access and participation are determined on an individual assessment basis.

The service is provided at no extra cost.

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