Adaptive Monitoring This documentation explains how Nagios allows you to change certain commands and host and service check attributes during runtime. Documentation - Adaptive Monitoring   Final Thoughts For any support related questions please... Read More

Alerting With MySQL and Nagios - NWC13 Sheeri Cabral's presentation - "Alerting On MySQL With Nagios" during the Nagios World Conference North America 2012.       Final Thoughts For any support related questions please visit the Nagios... Read More

Authentication And Authorization In The CGIs This documentation describes how the Nagios CGIs decide who has access to view monitoring and configuration information, and who can submit commands to the Nagios daemon through the web interface.... Read More

Cached Checks This documentation explains how cached checks allow Nagios to forgo executing a host or service check command if it determines a relatively recent check result will do instead. Documentation - Cached Checks   Final Thoughts For any... Read More

CGI Configuration File Options Information on the CGI configuration file options. Documentation - CGI Configuration File Options   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support.nagios.com... Read More

Nagios Core - Configuration Overview There are several different configuration files that you're going to need to create or edit before you start monitoring anything. Be patient! Configuring Nagios can take quite a while, especially if you'... Read More

Determining Status and Reachability of Network Hosts Nagios is able to determine whether the hosts you're monitoring are in a DOWN or UNREACHABLE state. These are very different (although related) states and can help you quickly determine the... Read More

Distributed Monitoring This documentation explains different solutions that allow Nagios to scale to monitor a large infrastructure. Documentation - Distributed Monitoring   Final Thoughts For any support related questions please visit the Nagios... Read More

Host and Service Dependencies Service and host dependencies are an advanced feature of Nagios that allow you to control the behavior of hosts and services based on the status of one or more other hosts or services. This documentation will explain how... Read More

How To Monitor A Linux/Unix Machine Information on how to monitor a Linux/Unix machine. Documentation - How To Monitor A Linux/Unix Machine   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support... Read More

How To Monitor A Netware Server This document provides information on how you can monitor Novell Netware servers. Documentation - How To Monitor A Netware Server   Final Thoughts For any support related questions please visit the Nagios Support... Read More

How To Monitor A Network Printer This document describes how you can monitor the status of networked printers. Specifically, HP printers that have internal/external JetDirect cards/devices, or other print servers that support the JetDirect protocol.... Read More

How To Monitor A Publicly Available Service (HTTP, FTP, SSH, etc.) This document describes how you can monitor publicly available services, applications and protocols. By "public" I mean services that are accessible across the network - either the... Read More

How To Monitor A Router/Switch This document describes how you can monitor the status of network switches and routers. Some cheaper "unmanaged" switches and hubs don't have IP addresses and are essentially invisible on your network, so there&... Read More

How To Monitor A Windows Machine This document describes how you can monitor "private" services and attributes of Windows machines, such as memory usage, CPU load, disk usage, service states and running processes. Documentation - How To Monitor A... Read More

How to Think with Nagios to Solve Monitoring Problems - NWC14 Welcome to the wonderful journey of monitoring problem solving! The different aspects of the essence of monitoring will be presented to you. You can learn the trick to make a plugin pass... Read More

Large Installation Tweaks Users with large Nagios installations may benefit from the use_large_installation_tweaks configuration option. This documentation explains how enabling this option allows the Nagios daemon to take certain shortcuts which... Read More

Leveraging SNMP Extensions with Nagios - NWC13 The MIB for SNMP extension is NET-SNMP-EXTEND-MIB which can be used as an agent-less option for monitoring. This MIB will provide the option to query commands or shell scripts for metrics that are... Read More

Main Configuration File Options The main configuration file contains a number of directives that affect how the Nagios daemon operates. This config file is read by both the Nagios daemon and the CGIs. Documentation - Main Configuration File Options �... Read More

Monitoring Remote Locations with Nagios - NWC13 Monitoring a single, connected network is straightforward. When you need to monitor various locations, with different access and connectivity challenges, things get a little more complicated. This... Read More

Monitoring Service and Host Clusters This documentation will show you how you can perform cluster monitoring based on the state of other hosts and services. Documentation - Monitoring Service and Host Clusters   Final Thoughts For any support... Read More

Multi-Tenant Nagios Monitoring - NWC14 This presentation details an implementation of Nagios Core that is used to monitor more than 5 individual customers using remote appliances sending via secure links to a central location.       Final... Read More

Nagios as a PC Health Monitor - NWC14 For organisations with limited budget or resources, Nagios can be a great tool to monitor the health of the their PC fleet. This presentation will cover real world examples of how integrating Nagios, NSClient++... Read More

Notification Escalations Nagios supports optional escalation of contact notifications for hosts and services. This documentation explains how escalations work. Documentation - Notification Escalations   Final Thoughts For any support related... Read More

Object Configuration Overview This document explains what objects are in Nagios. Documentation - Object Configuration Overview   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support.nagios.com... Read More

Object Definitions Object definition are used to define hosts, services, hostgroups, contacts, contactgroups, commands, etc. This is where you define all the things you want monitor and how you want to monitor them. Documentation - Object Definitions... Read More

Object Inheritance This documentation explains how object inheritance works in Nagios which can be used in object definitions and templates. Documentation - Object Inheritance   Final Thoughts For any support related questions please visit the... Read More

On-Call Rotations This documentation will show you how you can create timeperiod definitions in a way that can facilitate most on-call notification rotations. Documentation - On-Call Rotations   Final Thoughts For any support related questions... Read More

Passive Host State Translation This documentation explains passive host state translation in distributed and failover monitoring installations of Nagios. Documentation - Passive Host State Translation   Final Thoughts For any support related... Read More

Passive Monitoring with Nagios - NWC14 Whereas active monitoring receives all the attention, passive monitoring is the be-all, end-all to truly managing by exception. This session will present three scenarios for passive monitoring including:... Read More

Predictive Dependency Checks This documentation explains how predictive dependency checks for hosts and services works in Nagios. Documentation - Predictive Dependency Checks   Final Thoughts For any support related questions please visit the Nagios... Read More

Scheduled Downtime This documentation explains how Nagios allows you to schedule periods of planned downtime for hosts and service that you're monitoring. This is useful in the event that you actually know you're going to be taking a server... Read More

Service and Host Freshness Checks Nagios supports a feature that does "freshness" checking on the results of host and service checks. This documentation explains how freshness checks work. Documentation - Service and Host Freshness Checks   Final... Read More

SNMP Explained - NWC15 How does the snmp protocol work and how can it be used within Nagios?       Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support.nagios.com/forum/ Read More

SNMP Monitoring Architecture With Nagios - NWC13 SNMP is sometimes feared for being not-so-simple monitoring protocol, but as a standard it has proven its worth many times and is the main way to monitor network equipment as well as supported by all... Read More

SNMP Trap Integration There are hundreds of community-contributed SNMP addons and projects on Nagios Exchange. This documentation provides a few links to SNMP projects and categories that are most useful when integrating SNMP traps with Nagios.... Read More

Standard Macros in Nagios Standard macros that are available in Nagios are listed in this documentation. Documentation - Standard Macros in Nagios   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http:/... Read More

State Stalking State "stalking" is a feature which allows you to log changes in the output service and host checks even if the state of the host or service does not change. This documentation will explain how state stalking works. Documentation -... Read More

TCP Wrapper Integration This document explains how to easily generate alerts in Nagios for connection attempts that are rejected by TCP wrappers. For example, if an unauthorized host attempts to connect to your SSH server, you can receive an alert in... Read More

Overview This article describes how time period inheritance works in Nagios Core. The name directive must be defined in the parent object for inheritance to work. The parent object is being referenced by the use directive. The name directive is not... Read More

Time Periods Timeperiod definitions allow you to control when various aspects of the monitoring and alerting logic can operate. Documentation - Time Periods   Final Thoughts For any support related questions please visit the Nagios Support Forums at... Read More

Time-Saving Tricks For Object Definitions This documentation explains how you can exploit the features of template-based object definitions to save yourself time and to create complex (and simple) monitoring configurations. Documentation - Time... Read More

Understanding Macros and How They Work One of the main features that make Nagios so flexible is the ability to use macros in command defintions. Macros allow you to reference information from hosts, services, and other sources in your commands.... Read More

Verifying Your Configuration Information on verifying the Nagios Core monitoring configuration. Documentation - Verifying Your Configuration   This article also has related troubleshooting information: Documentation - Nagios service does not start -... Read More

Volatile Services This documentation explains what volatile services are in Nagios Core. Documentation - Volatile Services   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support.nagios.com/forum/ Read More

Group Deployment of Service Checks - NWC15 This presentation will show how you can create groups of checks like CPU metrics, Oracle metrics or IIS metrics and push them to all of the hosts that require them.  The presentation will provide a script... Read More

Overview This KB article shows you how to use certificate authority (CA) certificates with the check_ldaps plugin.   Problem When you try and execute the check_ldaps plugin: /usr/local/nagios/libexec/check_ldaps -H dc01.domain.local -b ''... Read More

Overview Agents are programs that help aid Nagios with monitoring.  Most often they are used to get information from remote machines or devices.   Agents There are several agents for Nagios, generally the agents work with Nagios Core and Nagios xi... Read More

Overview Nagios xi, as well as the Linux command line interface, have some reserved characters that need to be escaped in specific ways. Special characters are a group of characters that carry out special instructions, like the dollar sign $ which... Read More