Security Onion

Peel Back the Layers of Your Network


Security Onion is a Linux distro for intrusion detection, network security monitoring, and log management. It's based on Ubuntu and contains Snort, Suricata, Bro, OSSEC, Sguil, Squert, ELSA, Xplico, NetworkMiner, and many other security tools. The easy-to-use Setup wizard allows you to build an army of distributed sensors for your enterprise in minutes!



Our easy-to-use Setup wizard allows you to build an army of distributed sensors for your enterprise in minutes


Analyze your NIDS/HIDS alerts with Squert


Pivot between multiple data types with Sguil and send pcaps to Wireshark and NetworkMiner


Use ELSA to slice and dice your logs


Access full packet capture with CapMe


Snort/Suricata and Bro compiled with PF_RING to handle lots of traffic


Easy updates

Data Types
  • Alert data - HIDS alerts from OSSEC and NIDS alerts from Snort/Suricata
  • Asset data from Prads and Bro
  • Full content data from netsniff-ng
  • Host data via OSSEC and syslog-ng
  • Session data from Argus, Prads, and Bro
  • Transaction data - http/ftp/dns/ssl/other logs from Bro

Ready to peel back the layers of your network?  Get Security Onion!

Need help?  We have a Help page on our Wiki and we also offer commercial support and training.

See the latest announcements on the blog.

To learn more about installing and using Security Onion, check out our video playlist below.