CIRCL Passive DNS

An authoritative overview of the CIRCL Passive DNS threat intelligence feed, covering its delivery mechanisms, publication schedule, and security architecture integration.

Technical Specifications

Overview & Operational Role

The CIRCL Passive DNS stream delivers indicators and intelligence classified under Indicators of Compromise (IoCs). Within a Security Operations Center (SOC) or automated incident detection pipeline, this feed is designed to support real-time triage, automated blocklist compilation, or retrospective log correlation.

When ingested into SIEMs, SOAR playbooks, firewalls, or IDS/IPS engines, the feed enables security teams to identify threats matching known indicators using JSON API endpoints.

Integration & Ingestion Architecture

Integrating CIRCL Passive DNS into your detection pipeline requires planning around ingestion rates and format parsers:

• Protocol Handling: Ensure downstream log collectors or ingestion scripts support JSON API parsing natively or via ETL transformation.
• Update Frequency: Data is published on a Real-Time schedule. Configure polling jobs or webhook consumers to match this cadence without tripping rate limits.
• Licensing & Access: This stream operates under a Freemium (API Key) model. Review endpoint terms, quota headers, and authentication token requirements prior to production rollout.

Frequently Asked Questions

What kind of threat data does CIRCL Passive DNS provide?

CIRCL Passive DNS provides telemetry and indicator data categorized under Indicators of Compromise (IoCs).

How often is CIRCL Passive DNS updated?

This stream updates on a Real-Time basis. Polling schedules should match this cadence to avoid stale cache states.

What ingestion formats are supported?

CIRCL Passive DNS streams and exports indicators using JSON API.

Is CIRCL Passive DNS free or commercial?