Security Onion 2.4.150 Hotfix 20250522 now available!

Last week, we released version 2.4.150:

https://blog.securityonion.net/2025/05/security-onion-24150-celebrating.html

This week, an upstream package update caused an issue with one of our utilities so today we are releasing a hotfix which resolves this issue:

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

Known Issues

For a list of known issues, please see:

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

Existing 2.4 Installations

If you have an existing Security Onion 2.4 installation, you can update to the latest version using soup:

https://docs.securityonion.net/en/2.4/soup.html

Before updating your production deployment, we highly recommend testing the upgrade process on a test deployment that closely matches your production deployment if possible. This is especially important for releases that update components like Salt and Elastic.

New Installations

If this is your first time installing Security Onion 2.4, then we highly recommend starting with an IMPORT installation as shown at:

https://docs.securityonion.net/en/2.4/first-time-users.html

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/2.4/architecture.html

Documentation

You can find our online documentation here:

https://docs.securityonion.net/en/2.4/

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.

Questions, Problems, and Feedback

If you have any questions or problems relating to Security Onion 2.4, please use the 2.4 category at our Discussions site:

https://github.com/Security-Onion-Solutions/securityonion/discussions/categories/2-4

Security Onion Pro

We recently celebrated 10 years in business by announcing Security Onion Pro:

https://blog.securityonion.net/2024/07/celebrating-10-years-of-security-onion.html

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

You can read more about these enterprise features at:

https://securityonion.com/pro

Training

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://securityonionsolutions.com/hardware

Security Onion 2.3.220 Hotfix 20230301 Now Available!

We recently released Security Onion 2.3.220:
https://blog.securityonion.net/2023/02/security-onion-23220-now-available.html

Today, we are releasing a hotfix which resolves an issue with Curator:
https://docs.securityonion.net/en/2.3/release-notes.html#hotfix-20230301-changes

New Installations

If you want to perform a new installation, please review the documentation and then you can find instructions here:
https://docs.securityonion.net/en/2.3/download.html

Existing 2.3 Installations

If you haven't yet updated to 2.3.220, then you should review all links at the top of this post so that you are aware of all recent changes.

WARNING! If you have an existing Security Onion 2.3 installation and update to Security Onion 2.3.140 or higher, the Elastic components will undergo a major version upgrade to version 8. Please review and follow the steps at the link below. Failure to do so could result in loss of access to all data stored inside of Elastic and a non-functioning Security Onion installation.

https://docs.securityonion.net/en/2.3/soup.html#elastic-8

Please be aware that custom settings in Kibana may be overwritten during upgrade. We recommend that you test the upgrade process on a test deployment before deploying to production. If you have a distributed deployment, then we recommend monitoring SOC Grid while your update is running to verify that all nodes update properly. If there are issues, you can review logs, services, and containers for any additional clues. If you need help, please see our support information below.

If you have custom Elasticsearch templates, please see:
https://docs.securityonion.net/en/2.3/elasticsearch.html#custom-templates

For more information about the update process, please see:
https://docs.securityonion.net/en/2.3/soup.html

Security Onion 16.04

If you are still running Security Onion 16.04, please note that it is past End Of Life. Please take this opportunity to upgrade to Security Onion 2:
https://docs.securityonion.net/en/2.3/appendix.html

Questions or Problems

If you have questions or problems, please see our support options:
https://docs.securityonion.net/en/2.3/support.html

Security Onion 2.3.140 20220812 Hotfix Now Available!

We recently released Security Onion 2.3.140 and a hotfix:
https://blog.securityonion.net/2022/07/security-onion-23140-now-available.html
https://blog.securityonion.net/2022/07/security-onion-23140-20220719-hotfix.html

Today, we are releasing a second hotfix that addresses an additional issue:
https://docs.securityonion.net/en/2.3/release-notes.html#hotfix-20220812-changes

New Installations

If you want to perform a new installation, please review the documentation and then you can find instructions here:
https://docs.securityonion.net/en/2.3/download.html

Existing 2.3 Installations

If you haven't yet updated to 2.3.140, then you should review all links at the top of this page so that you are aware of all recent changes.

WARNING! If you have an existing Security Onion 2.3 installation and update to Security Onion 2.3.140 or higher, the Elastic components will undergo a major version upgrade to version 8. Please review and follow the steps at the link below. Failure to do so could result in loss of access to all data stored inside of Elastic and a non-functioning Security Onion installation.

https://docs.securityonion.net/en/2.3/soup.html#elastic-8

Please be aware that custom settings in Kibana may be overwritten during upgrade. We recommend that you test the upgrade process on a test deployment before deploying to production. If you have a distributed deployment, then we recommend monitoring SOC Grid while your update is running to verify that all nodes update properly. If there are issues, you can review logs, services, and containers for any additional clues. If you need help, please see our support information below.

If you have custom Elasticsearch templates, please see:
https://docs.securityonion.net/en/2.3/elasticsearch.html#custom-templates

For more information about the update process, please see:
https://docs.securityonion.net/en/2.3/soup.html

Security Onion 16.04

If you are still running Security Onion 16.04, please note that it is past End Of Life. Please take this opportunity to upgrade to Security Onion 2:
https://docs.securityonion.net/en/2.3/appendix.html

Questions or Problems

If you have questions or problems, please see our support options:
https://docs.securityonion.net/en/2.3/support.html

Security Onion 2.3.140 20220719 Hotfix Now Available!

We recently released Security Onion 2.3.140:
https://blog.securityonion.net/2022/07/security-onion-23140-now-available.html

Today, we are releasing a hotfix that addresses a few issues in the update process:
https://docs.securityonion.net/en/2.3/release-notes.html#hotfix-20220719-changes

New Installations

If you want to perform a new installation, please review the documentation and then you can find instructions here:
https://docs.securityonion.net/en/2.3/download.html

Existing 2.3 Installations

If you already updated to Security Onion 2.3.140 successfully, then you don't need to install this hotfix.

If you tried to update 2.3.140 and it failed, please see our support options:
https://docs.securityonion.net/en/2.3/support.html

If you haven't yet attempted to update to 2.3.140, then you should review all links at the top of this page so that you are aware of all recent changes.

WARNING! If you have an existing Security Onion 2.3 installation and update to Security Onion 2.3.140 or higher, the Elastic components will undergo a major version upgrade to version 8. Please review and follow the steps at the link below. Failure to do so could result in loss of access to all data stored inside of Elastic and a non-functioning Security Onion installation.

https://docs.securityonion.net/en/2.3/soup.html#elastic-8

Please be aware that custom settings in Kibana may be overwritten during upgrade. We recommend that you test the upgrade process on a test deployment before deploying to production. If you have a distributed deployment, then we recommend monitoring SOC Grid while your update is running to verify that all nodes update properly. If there are issues, you can review logs, services, and containers for any additional clues. If you need help, please see our support information below.

If you have custom Elasticsearch templates, please see:
https://docs.securityonion.net/en/2.3/elasticsearch.html#custom-templates

For more information about the update process, please see:
https://docs.securityonion.net/en/2.3/soup.html

Security Onion 16.04

If you are still running Security Onion 16.04, please note that it is past End Of Life. Please take this opportunity to upgrade to Security Onion 2:
https://docs.securityonion.net/en/2.3/appendix.html

Questions or Problems

If you have questions or problems, please see our support options:
https://docs.securityonion.net/en/2.3/support.html

Security Onion 2.3.110 20220405 Hotfix Now Available!

We recently released Security Onion 2.3.110 and a hotfix:
https://blog.securityonion.net/2022/03/security-onion-23110-now-available.html
https://blog.securityonion.net/2022/04/security-onion-23110-20220401-hotfix.html

Today, we are releasing a second hotfix:
https://docs.securityonion.net/en/2.3/release-notes.html#hotfix-20220405-changes

If you haven't updated recently, then you should review all links above so that you are aware of all recent changes.

This hotfix addresses an issue with SaltStack updates for Ubuntu and now pulls these packages from our standard Security Onion repository. If you are locking down your outbound access you will need to allow access to repo.securityonion.net for these new updates.

If you are using CentOS and have already applied the 20220401 hotfix, then this hotfix is optional.

New Installations

If you want to perform a new installation, please review the documentation and then you can find instructions here:
https://docs.securityonion.net/en/2.3/download.html

Existing 2.3 Installations

If you have an existing 2.3 installation that you want to update, please see:
https://docs.securityonion.net/en/2.3/soup.html

Security Onion 16.04

If you are still running Security Onion 16.04, please note that it is past End Of Life. Please take this opportunity to upgrade to Security Onion 2:
https://docs.securityonion.net/en/2.3/appendix.html

Questions or Problems

If you have questions or problems, please see our community support forum guidelines:
https://docs.securityonion.net/en/2.3/community-support.html

You can then find the community support forum at:
https://securityonion.net/discuss