Security Onion Documentation Printed Book Now Updated for Security Onion 3.0!

We've been offering our Security Onion documentation in book form on Amazon for a few years and it's now been updated for the recently released Security Onion 3.0!

Proceeds go to the Rural Technology Fund!

This edition has been updated for Security Onion 3.0 and includes a 20% discount code for our on-demand training and certification!

This book covers the following Security Onion topics:

• First Time Users
• Getting Started
• Security Onion Console (SOC)
• Security Onion Desktop
• Network Visibility
• Additional Network Visibility
• Host Visibility
• Third Party Integrations
• Rules
• Logs
• Updating
• Accounts
• Services
• Customizing for Your Environment
• Tricks and Tips
• Utilities
• Help

Q&A

What is the difference between this book and the online documentation?

This book is the online documentation formatted specifically for print. Proceeds go to the Rural Technology Fund! Finally, the printed book includes a 20% discount code for our on-demand training and certification.

Who should get this book?

You should get this book if you work on airgap networks or simply want a portable reference that doesn't require an Internet connection or batteries! Also anyone who wants to donate to a worthy cause like Rural Technology Fund!

What is the difference between this edition and the previous edition?

This edition has been updated for Security Onion 3.0!

Where do we get it?

https://securityonion.com/book

Early Bird Discount for "Security Onion for Analysts and Threat Hunters" Class Running Virtually in August 2026!

Our "Security Onion for Analysts and Threat Hunters" class will be running virtually August 25, 2026 through August 28, 2026. Use the following code before June 1, 2026 to get 10% off!

earlybird

For more info and to register, please visit https://securityonionaug2026.eventbrite.com/.

For a list of our upcoming public classes, please visit https://securityonionsolutions.com/training/#public-training.

Security Onion 2.4.211 Hotfix 20260407 Now Available!

Last month, we released version 2.4.211:

https://blog.securityonion.net/2026/03/security-onion-24211-is-now-available.html

Today we are releasing a hotfix which resolves an issue with Suricata BPF handling in TRANSITION mode:

https://docs.securityonion.net/en/2.4/release-notes.html

6 month EOL notice for Security Onion 2.4

Yesterday, we released Security Onion 3:

https://blog.securityonion.net/2026/03/security-onion-300-now-available-with.html

Today, we are announcing the 6-month EOL notice for Security Onion 2.4 as it will reach EOL on October 1, 2026.

If you are currently running Security Onion 2.4, you can upgrade using the instructions in the documentation:

https://securityonion.net/docs/appendix/

If you are a current Security Onion Solutions customer with Professional Services or Appliance coverage and need assistance with your upgrade, please reach out to Support and we’ll be happy to assist you!