By defenders. For defenders.
Peel back the layers of your network and make your adversaries cry.
https://www.securityonion.com
Security Onion
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On this day in 2009 the very first release of Security Onion hit the Internet. A lot has changed since then, but it's still the best free and open solution to help you peel back the layers of your network and see what's really happening.
🚀Introducing SO-CRATES 1.0 — Security Onion Containerized Rapid Analysis of Threats, Evil, and Sus!
SO-CRATES is a single container image for analyzing pcap files, log files, and binary files. It was formerly known as OhMyPCAP.
Security Onion
For those who don't know, we offer a printed copy of our documentation via Amazon. All proceeds go to the Rural Technology Fund, and the book comes with a 20% off discount code for our on-demand training and the Security Onion Certified Professsional (SOCP) certification exam.
It's time for O's, Bohs, and SO -- Security Onion Solutions is coming to Baltimore! Looking forward to seeing all our friends at #AFCEATechnet in Charm City this week, come see us at booth 3242 to find out how we can help you peel back the layers of your network and make the bad guys cry.
DID YOU KNOW?
It's possible to enable or disable Suricata NIDS rules in Security Onion using regular expressions -- if you want to turn off all of those ET INFO or TOR alerts, this is an easy way to do it. And the best part is it will apply to new rules that are added to the set in the future.
Our printed documentation book has been updated for Security Onion 3.1 and is available from Amazon now!
Good morning Charm City! If you're at #AFCEATechnet, come to booth 3242 to see the legendary Michael Stokes and learn about using Security Onion to peel back the layers of your network.
More details here: blog.securityonion.net/2026/05/secu...
Security Onion 3.1.0 Hotfix 20260528 Now Available!
We've released a hotfix to Security Onion 3.1.0 to address issues for deployments with Heavy Nodes or custom Logstash pipelines - please check out this blog post for more information.
blog.securityonion.net/2026/05/secu...
IT'S TIME FOR SOUP!
Security Onion 3.1.0 is now available and includes new features, updated components, and many quality-of-life improvements!
Get all the details on our blog:
blog.securityonion.net/2026/05/secu...
