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
- 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?
Download and verify the Security Onion ISO image
If this is your first time installing Security Onion, we recommend the Quick Installation Guide.
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.