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Free and open platform for threat hunting, enterprise security monitoring, and log management.

The easy-to-use Setup wizard allows you to build an army of distributed sensors for your enterprise in minutes!
Security Onion includes a native web interface with built-in tools analysts use to respond to alerts, hunt for evil, catalog evidence into cases, monitor grid performance, and much more. Additionally, third-party tools, such as Elasticsearch, Logstash, Kibana, Suricata, Zeek (formerly known as Bro), Wazuh, Stenographer, CyberChef, NetworkMiner, and many more are included.

From a single network appliance, to a grid of a thousand nodes, Security Onion scales to fit your specific needs.

Security Onion and the tools we integrate are all open to the public, written by members of the cyber security community. Source code is available in GitHub for review by those interested in understanding how the system works, behind the scenes.