Security Onion 3.1.0 is now available and includes new features, updated components, and many quality of life improvements!
For a full screenshot tour, please see the First Time Users section of our documentation:
- Add bonded NIC support for management interfaces
- Simplified Onion AI setup for regions outside the US
- Onion AI support for Azure OpenAI endpoints
- CyberChef to 11.0.0
- Elastic to 9.3.3
- Kratos and Hydra to 26.2.0+pgx
- Nginx to 1.30.1
- SOC frontend 3rd party deps
- Suricata to 8.0.5
- Zeek to 8.0.8
https://docs.securityonion.net/en/3/main/release-notes#changes
Known Issues
For a list of known issues, please see:
https://docs.securityonion.net/en/3/main/release-notes#known-issues
About Security Onion
Security Onion is a free and open platform built by defenders for defenders. It includes network visibility, host visibility, intrusion detection honeypots, log management, and case management.
For network visibility, we offer signature based detection via Suricata, rich protocol metadata and file extraction using your choice of either Zeek or Suricata, full packet capture, and file analysis. For host visibility, we offer the Elastic Agent which provides data collection, live queries via osquery, and centralized management using Elastic Fleet. Intrusion detection honeypots based on OpenCanary can be added to your deployment for even more enterprise visibility. All of these logs flow into Elasticsearch and we’ve built our own user interfaces for alerts, dashboards, threat hunting, case management, and grid management.
Security Onion has been downloaded over 2 million times and is being used by security teams around the world to monitor and defend their enterprises. Our easy-to-use Setup wizard allows you to build a distributed grid for your enterprise in minutes!
Documentation
You can find our online documentation here:
https://docs.securityonion.net/en/3/main/
Documentation is always a work in progress. If you find documentation that needs to be updated, please let us know as described in the Feedback section below.
New Installations
If this is your first time installing Security Onion, then we highly recommend starting with an IMPORT installation as shown at:
https://docs.securityonion.net/en/3/main/first-time-users
Once you’re comfortable with your IMPORT installation, then you can move on to more advanced installations as shown at:
https://docs.securityonion.net/en/3/main/architecture
Existing 2.4 Installations
Security Onion 3 only supports Oracle Linux 9. If you are running Security Onion 2.4 on some other unsupported distro, then you will need to perform a fresh installation of Security Onion 3.
If you have an existing Security Onion 2.4 installation running on Oracle Linux 9, you can upgrade to Security Onion 3 as shown here:
https://docs.securityonion.net/en/3/main/appendix
Before updating your production deployment, we highly recommend testing the upgrade process on a test deployment that closely matches your production deployment if possible.
2.4 EOL
Security Onion 2.4 will reach End Of Life (EOL) on October 1, 2026. If you are a Security Onion Solutions customer, please feel free to reach out to our Support team for assistance.
Thanks
Lots of love went into this release!
Special thanks to all our folks working so hard to make this release happen!
- Josh Brower
- Jason Ertel
- Corey Ogburn
- Josh Patterson
- Mike Reeves
- Jorge Reyes
- Matthew Wright
Questions, Problems, and Feedback
If you have any questions or problems, please create a new Discussion at:
https://securityonion.net/discuss
Security Onion Pro
Security Onion Pro includes many enterprise features that folks have been asking for:
- Active Query Management
- External API
- Open ID Connect (OIDC)
- Data at Rest Encryption
- FIPS for the OS
- DoD STIG for the OS
- External Notifications in SOC
- Time Tracking inside of Cases
- Guaranteed Message Delivery
- Manager of Managers
- MCP Server
- Security Onion App for Splunk
- Hypervisor
- Reports
- Onion AI Assistant
You can read more about these enterprise features at:
https://securityonion.com/proTraining
Need training? Start with our free Security Onion Essentials training and then take a look at some of our other official Security Onion training!
https://securityonion.net/training
Security Onion Solutions Hardware Appliances
We know Security Onion's hardware needs, and our appliances are the perfect match for the platform. Leave the hardware research, testing, and support to us, so you can focus on what's important for your organization. Not only will you have confidence that your Security Onion deployment is running on the best-suited hardware, you will also be supporting future development and maintenance of the Security Onion project!
https://securityonion.com/hardware
Cloud Installations
For new Security Onion 2 installations in the cloud, this new version will soon be available on the AWS, Azure, and GCP marketplaces!
AWS Marketplace and Documentation:
https://securityonion.net/aws/
https://docs.securityonion.net/en/3/main/cloud-amazon
Azure Marketplace and documentation:
https://securityonion.net/azure
https://docs.securityonion.net/en/3/main/cloud-azure
GCP Marketplace and documentation:
https://securityonion.net/google
