Active Checks Nagios is capable of monitoring hosts and services in two ways: actively and passively. Active checks are the most common method for monitoring hosts and services and is explain in this document. Documentation - Active Checks   Final... Read More

Advice for Beginners Information for beginners to Nagios Core. Documentation - Advice for Beginners   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support.nagios.com/forum/ 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

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

Detection and Handling of State Flapping Nagios supports optional detection of hosts and services that are "flapping". Flapping occurs when a service or host changes state too frequently, resulting in a storm of problem and recovery notifications.... 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

Getting Started with Nagios Core This presentation will provide an introduction to the capabilities, features, and benefits of Nagios Core.       Final Thoughts For any support related questions please visit the Nagios Support Forums at: http:/... Read More

Host Checks The basic workings of host checks are described in this document. Documentation - Host Checks   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support.nagios.com/forum/ Read More

Information On The CGIs The various CGIs distributed with Nagios are described in this documentation, along with the authorization requirements for accessing and using each CGI. Documentation - Information On The CGIs   Final Thoughts For any... 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 Plugins Unlike many other monitoring tools, Nagios does not include any internal mechanisms for checking the status of hosts and services on your network. Instead, Nagios relies on external programs (called plugins) to do all the dirty work.... Read More

Notifications This documentation explains how the notification logic works in Nagios Core. Documentation - Notifications   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support.nagios.com/forum/ 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 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

Passive Checks Nagios is capable of monitoring hosts and services in two ways: actively and passively. Passive checks are performed by external applications and is explain in this document. Documentation - Passive Checks   Final Thoughts For any... 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

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

Security Considerations This documentation is a brief overview of things you should keep in mind when installing Nagios, so as set it up in a secure manner. Documentation - Security Considerations   Final Thoughts For any support related questions... Read More

Service Checks The basic workings of service checks are described in this document. Documentation - Service Checks   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support.nagios.com/forum/ 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 Types This documentation explains what states are in Nagios Core. Documentation - State Types   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support.nagios.com/forum/ Read More

The Art & Zen of Managing Nagios with Puppet - NWC14 The trend towards DevOps has brought new levels of agility and responsiveness to all sorts of IT organizations, from small startups to large enterprises. But with the constant production... 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

Tuning Nagios For Maximum Performance Tuning Nagios to increase performance can be necessary when you start monitoring a large number (> 1,000) of hosts and services. This documentation explains things to look at for optimizing Nagios.... 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

What is Nagios Core? Getting started information about Nagios Core. Documentation - What is Nagios Core?   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support.nagios.com/forum/ Read More

What's New in Nagios Core 4.x An overview of what's New in Nagios Core 4.x. Documentation - What's New in Nagios Core 4.x   Final Thoughts For any support related questions please visit the Nagios Support Forums at: http://support... Read More