Overview This KB article shows you how to configure your Nagios server with a static IP address. This KB article applies to RHEL, CentOS and Oracle Linux, as well as Ubuntu and Debian. This applies to Nagios Fusion, Nagios Log Server, Nagios Network... Read More

Installing Nagios Mobile This document describes how to install and take initial setup steps for the Nagios Mobile interface on Nagios Core or Nagios xi, older than 2012RC2. Documentation - Installing Nagios Mobile   Final Thoughts For any support... Read More

Overview This KB article will walk you through the steps of moving the /var/log directory to a new disk/volume in your server. This is sometimes necessary to free up disk space on a volume that cannot have extra disk space easily added. This guide... Read More

10,000 Services (and growing!) Across the State of Ohio - NWC14 This presentation will cover how Agile Networks developed a customized Nagios xi Installation that handles the monitoring for a state wide distribution of routers, point to point and... Read More

Activating Your License This document describes how to activate a Nagios xi license. Documentation - Activating Your License   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support.nagios.com... Read More

Nagios xi - Audit Log Any compliance concerns? Learn how to use the audit log in this very quick tutorial where Aaron shows us the ropes of this nifty feature in Nagios xi.         Final Thoughts For any support related questions please visit... Read More

Changing The System Time Nagios xi needs to be configured with the correct timezone for all features to work. This can be performed via:   xi 5 onwards Admin > System Config > System Settings Pre xi 5 Admin > System Config > Manage... Read More

Checking System Status in Nagios xi This video tutorial will demonstrate how to check the system status in Nagios xi, to get a sense of your monitoring metrics on your system.       Final Thoughts For any support related questions please visit... Read More

Configuring SSL for Nagios xi This document will describe how to setup SSL. This document is also to be used an initial point for troubleshooting SSL connections. Documentation - Configuring SSL for Nagios xi   Final Thoughts For any support related... Read More

Connecting Nagios xi To Your Email Server This video will demonstrate how connect Nagios xi to your Email Server to help you send emails through Nagios xi.       Final Thoughts For any support related questions please visit the Nagios Support... Read More

Customizing The Landing Page This document describes how to customize the landing page that users see when they initially login to the Nagios® xi™ web interface. One of the benefits of Nagios xi is the flexibility to customize the information... Read More

Database Optimization This document describes how to configure optimal database settings for Nagios® xi™ for increased performance. Nagios xi stores current and historical information in various databases in order to facilitate reports and provide... Read More

Overview This document describes how to disable UTF8 connectivity to the MySQL / MariaDB databases for Nagios xi. By default Nagios xi uses UTF8 however sometimes this needs to be disabled to allow MySQL / MariaDB to define the connectivity method.... Read More

Enabling Memcached Support This document describes how to increase the performance of Nagios xi by enabling memcached. Memcached provides a mechanism for caching SQL query results in memory on one or more memcached servers. Caching query results can... Read More

Overview This KB article shows you how to setup a Nagios xi server to perform baseline testing. Baseline testing allows you to determine if an xi server is capable of handling the amount of checks you intend to configure. It is important to identify... Read More

How to Change Default Passwords The purpose of this document is to provide a guide on changing the default passwords for an existing Nagios xi installation to ensure a safe and secure monitoring environment. This includes changing the passwords for... Read More

How to Integrate SNMP Traps With Nagios xi This document describes how to configure Nagios® xi™ to receive and process SNMP traps from external devices. Monitoring SNMP traps allows system administrators to monitor real-time events and network... Read More

How to Manage Remote Nagios xi Servers Managing a Nagios® xi™ server is an important requirement to ensure that the monitoring server can be configured to meet organizational needs and that application updates (patches and upgrades) can be applied... Read More

Installing Components This document describes how to upload and install new components in Nagios xi. Documentation - Installing Components   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support... Read More

This article has been retired due to obsolescence and is no longer used. Please visit Support.nagios.com for additional resources. Please note that Mod-Gearman dropped support for Nagios Core in March of 2022. xi integration with Mod-Gearman is also... Read More

Overview This KB article describes how to add quick links that will open a PuTTY SSH session to a remote server.  The links will appear on the Host Detail or Service Detail pages in the Quick Action section near the "Enable/Disable notifications"... Read More

Problem Description When using the "LDAP / Active Directory Import Users" component in Nagios xi you may receive an error like the following when attempting to login: Unable to authenticate: TLS error-8179:Peer's Certificate issuer is not... Read More

Overview Some Nagios xi users showed interest in setting up a license status check in xi. Having such a check makes perfect sense.  If you were notified that your license is about to expire, you would renew it on time thus avoiding any possible... Read More

Log Locations and Descriptions This document describes the Nagios Core, Nagios xi, and system logs on a Nagios xi server, including the locations and a brief descriptions of their potential contents and diagnostic uses. Documentation - Log Locations... Read More

Managing Nagios xi Components This video tutorial will demonstrate how to manage the Nagios xi Components, as well as how to upgrade and install them on your xi machine.         Final Thoughts For any support related questions please visit the... Read More

Mass Delete Old RRD Files This KB article will show you how to run a script to delete all RRDs (and their respective XML files) under /usr/local/nagios/share/perfdata that have not been written to in 5 days, that also includes hosts/services that... Read More

Maximizing Performance In Nagios xi This document describes how to maximize the performance of your Nagios® xi™ server in a non-distributed environment in order to increase the overall efficiency of the monitoring server. This document will cover... Read More

Monitoring Using the Full Power of Nagios xi Enterprise - NWC15 This presentation will take a close look at how the Enterprise Edition of Nagiosxi is used within Landis+Gyr to monitor systems, applications, and utility networks. You will get a... Read More

Overview This KB article is about the MySQL / MariaDB database and adjusting the maximum connections allowed. This can be required in larger xi installations. Historically MySQL has been the database used by Nagios xi, however in CentOS 7 &... Read More

Overview This KB article explains how to resolve the following errors that appear in the /var/log/messages file on your Nagios xi server: Aug 14 23:30:03 centosxx ndo2db: Error: mysql_query() failed for 'INSERT INTO nagios_scheduleddowntime SET... Read More

Offloading MySQL to Remote Server This document is meant to show a step-by-step guide for offloading the MySQL services from the central Nagios xi server to an external, remote server. Documentation - Offloading MySQL to Remote Server   Final... Read More

Overview This KB article provides steps on optimizing the PHP settings file php.ini on your Nagios xi server. There are certain situations where the default settings in PHP need increasing to improve the features of Nagios xi on larger systems. PHP... Read More

Overview When configuring my monitoring agent I need to define the password in a plain text file. This seems very insecure, how do I encrypt it? — Concerned Customer This is a valid question, this KB article discusses the limitations around... Read More

Problem Description When you go to Admin > System Config > System Profile and try to download the profile you receive the following error: PROFILE BUILD FAILEDArray()CODE: 1    Resolving The Problem This problem is occurring because the... Read More

Description Nagios xi has back-end credentials that are used internally by the application sub-components. These are not used by the end users, nor do you need to know what they are. However you might like to reset these credentials due to certain... Read More

Problem Description You do not know the password for the nagiosadmin account and need to reset it.   Resetting The Password Open an SSH or direct console session to your Nagios xi host and execute the following command: /usr/local/nagiosxi/scripts... Read More

Resizing the VM Disk Size This documentation describes how to increase the size of the Nagios xi virtual machine (VM) disk. CentOS 7 Documentation - Resizing The VM Disk Size For CentOS 7   Final Thoughts For any support related questions please... Read More

Securing Your Nagios Server This presentation will cover best practices, methodologies, and tools for securing your Nagios server against external threats.       Final Thoughts For any support related questions please visit the Nagios Support... Read More

Setup Nagios xi to Send SMS Alerts This document describes how to setup SMS alerts and how to manage mobile carriers in Nagios xi. Notifications by SMS must be enabled per user in Nagios xi. Receiving SMS alerts allow users to get updates about their... Read More

Should You Change RRD Retention Periods? How do you change RRD retention periods? Should you? Aaron has you covered with this Nagios Pro Tip.         Final Thoughts For any support related questions please visit the Nagios Support Forums at:... Read More

Nagios xi - SNMP Trap Hardening This KB article explains how to harden your Nagios xi server to only accept SNMP traps from authorized sources. By default the Nagios xi server will accept inbound SNMP v2 traps from any device. SNMP v3 traps will not... Read More

Nagios xi - SNMP v3 Trap Configuration This KB article explains how to configure your Nagios xi server to accept SNMP v3 traps. By default the Nagios xi server will accept inbound SNMP v2 traps from any device. SNMP v3 traps will not be accepted by... Read More

Overview This KB article shows you how to enable and use the Two Factor Authentication functionality that was added in Nagios xi 5.5. Two factor authentication adds additional login security to Nagios xi, it requires the end user to provide a... Read More

Understanding the Nagios xi Directory Structure This document is intended to describe where Nagios® xi™ and its related components are located on the machine where Nagios xi has been installed. The Nagios xi directory structure is slightly... Read More

Update Components And Wizards Aaron shares a tip about how to ensure you're running the latest components & wizards even if you haven't updated your Nagios version recently.         Final Thoughts For any support related questions... Read More

Overview   Warning: Do not use the steps in this article if you have an RPM installed system (either offline or non-offline). This document describes how to upgrade to PHP 7 on RHEL, CentOS and Oracle Linux systems. Nagios xi is compatible with the... Read More

Uploading and Managing MIBS Learn how to upload and manage MIB files in Nagios xi, including how to import SNMP trap definitions upon upload or at a later time.       Final Thoughts For any support related questions please visit the Nagios... Read More

Using DUO Two Factor Authentication This document describes how to configure Nagios xi to use DUO for two factor authentication (2FA). Nagios xi already provides email 2FA however DUO can be used instead, this makes 2FA more accessible on more... Read More

Using rrdcached with Nagios xi This document describes how to enable rrdcached with Nagios xi as a step to improve performance and reduce disk I/O on large installations.  Documentation - Using rrdcached with Nagios xi   Final Thoughts For any... Read More

Using SSL with xi Active Directory A brief description of what the documentation will include Documentation - Using SSL with xi Active Directory   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http:/... Read More

Overview This KB article shows you how to use the Custom Includes component in Nagios xi (available in xi 5.3.0 onwards). The Custom Includes component allows you to upload your own custom Cascading Style Sheets (CSS), JavaScripts and Images to... Read More

Utilizing a RAM Disk in Nagios xi This document describes how to use a RAM disk to boost performance on a Nagios xi server. Documentation - Utilizing a RAM Disk in Nagios xi   Final Thoughts For any support related questions please visit the Nagios... Read More

Virtual Machine Notes This document includes important Information about he Nagios xi virtual machines provided by Nagios Enterprises. Documentation - Virtual Machine Notes   Final Thoughts For any support related questions please visit the Nagios... Read More

Overview The NDOUtils NDOMOD broker module can be configured to only processed certain types of data. This is defined in the ndomod.cfg file. There are two ways of defining this which are explained in this article.     Location of settings This... Read More

Configuring SSL/TLS For NRDP This KB article describes how to configure NRDP on your Nagios Core server to use certificates for SSL/TLS. Using SSL/TLS for NRDP ensures that the data communication is encrypted. This guide is based on Nagios Core being... Read More

This document is no longer available. For assistance with your virtual machine, please work with your internal IT/Linux team or vendor.If you do need IT/Linux support, we have a network of global partners who offer professional services that may be... Read More

Overview This KB article explains the differences between the Standard and Embedded handler for processing SNMP Traps. Detailed steps are provided to configure Nagios xi to use either method (the standard handler is the default used). Nagios xi 5.5... Read More

Overview This KB article explains how to identify the SNMP Trap variables that exist in traps and how they are used with SNMPTT. It is assumed that you have already configured Nagios xi to receive SNMP Traps by following this guide: How to Integrate... Read More

Overview This KB article shows you how you can sign your SSL/TLS certificates with a Microsoft Certificate Authority (CA). This article compliments our product specific documentation for configuring SSL/TLS. Why would you want to do this? When you... Read More

Overview This KB article explains the different certificate warnings you may experience when implementing an SSL/TLS certificate on your Nagios product. The following warnings are addressed in this KB article: Certificate Authority Is Not Trusted... Read More

The Nagios xi default database changed from PostgreSQL to MySQL, since the initial release of xi 5.  If you see a notice after upgrading xi on your server to version 5.10.0, or later, to convert your PostgreSQL database to MySQL, it means you are... Read More