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

Configuring SSL/TLS For Nagios Core This KB article describes how to configure your Nagios Core server to use certificates for SSL/TLS. This KB article is also to be used an initial point for troubleshooting SSL/TLS connections. This guide is broken... Read More

Custom CGI Headers and Footers This documentation explains how to have a custom header and/or footer displayed in the output of the CGIs. Documentation - Custom CGI Headers and Footers   Final Thoughts For any support related questions please visit... Read More

Enhanced CGI Security and Authentication This documentation is an introduction for implementation of stronger authentication and server security focused around the CGI web interface. Documentation - Enhanced CGI Security and Authentication   Final... Read More

Fast Startup Options There are a few things you can do that can decrease the amount of time it take Nagios to startup (or restart). These speedups involve easing some of the burden involved in processing your configuration files.Starting with Nagios... 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

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

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 Â... 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

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

Starting and Stopping Nagios There's more than one way to start, stop, and restart Nagios. This document covers some of the more common ways. Documentation - Starting and Stopping Nagios   Final Thoughts For any support related questions please... 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

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

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

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