2026R2 Overview: Big Updates Across the Nagios Stack

The 2026R2 releases of Nagios XI, Log Server, Network Analyzer, and Fusion bring a variety of high-value updates and features. In this article we’ll take a quick look at key advancements in each of the Nagios Solutions and include links to additional resources to help you learn more and leverage them.

Nagios XI

• RHEL/CentOS/Oracle 10 support

XI now supports installation on EL 10 operating systems!

• Roles

Now you can manage user permissions both individually and using Roles for role-based access control with blanket presets.

• The Wizard Builder and new Declarative Wizard format

The new Declarative Wizard format provides a modernized, more AI-friendly approach to writing custom wizards in JSON, and the Wizard Builder gives you a step-by-step method for creating custom wizards right in the GUI.

• New experimental navigation

A new experimental navigation structure is also loaded in this release, including a nested left-hand navbar, user settings moved to the bottom left, and additional options at the top of the UI. To try it out, navigate to Admin > System Config > System Settings > General tab, and enable it in the Experimental Features section.

Nagios Log Server

• OpenSearch disk usage alerting

You can now activate a notice at the top of the UI, and color-code the advanced Home menu’s Total OpenSearch Disk Usage panel red, when usage exceeds a threshold you set. You can activate this feature in the Admin > General > Global Settings menu, in the OpenSearch Disk Usage Alerting section.

• Manage TLS/SSL Certificates page

In previous versions, SSL certificates were managed in the LDAP/AD Integration menu. Now that certificates may also be used for the event-based collection with the Fusion producer, management has been moved to its own new menu in 2026R2. Certificate management is now handled in the Admin > Management > Manage TLS/SSL Certificates menu.

Nagios Network Analyzer

• Navbar update with new Integrations tab

You’ll notice some changes to the left-hand navigation bar, including a new Integrations section where Suricata, Wireshark, Nmap, and the new Fusion event-based collection settings are now nested.

• Suricata Dashlet

The new Suricata Dashlet will help make sure you see new SID alerts quickly in your custom dashboards.

• Source Group Dashlet options

New Group options have been added to many of the available dashlets, enabling you to leverage your Source Groups to filter the data shown.

• Traceroutes retention time

You’ll see a new Settings icon at the top of the main Traceroutes tab that you can use to configure how long NNA should hold onto your traceroute data.

• Wireshark scans of multiple interfaces

You can now select multiple interfaces when you run Wireshark packet captures.

• System Profile

You can now generate a System Profile file right from the UI in the Administration > System > System Profile menu to help the Support team quickly understand your setup.

Nagios Fusion

Fusion 2026R2 is the result of a tremendous amount of work by a team of top developers at Nagios this year. This release is a complete re-imagining and modernizing of the solution, both under the hood and in the user interface.

You can take a peek at this article for details on all the big changes, along with links to additional resources to help you explore further. Central visibility of your Nagios XI, Core, Log Server, and Network Analyzer data has never looked better!

Another great resource is the fully updated Getting Started guide: