Book Image

Nagios Core Administration Cookbook

By : Tom Ryder
Book Image

Nagios Core Administration Cookbook

By: Tom Ryder

Overview of this book

Network monitoring requires significantly more than just pinging hosts. This cookbook will help you to comprehensively test your networks' major functions on a regular basis."Nagios Core Administration Cookbook" will show you how to use Nagios Core as a monitoring framework that understands the layers and subtleties of the network for intelligent monitoring and notification behaviour. Nagios Core Administration Guide introduces the reader to methods of extending Nagios Core into a network monitoring solution. The book begins by covering the basic structure of hosts, services, and contacts and then goes on to discuss advanced usage of checks and notifications, and configuring intelligent behaviour with network paths and dependencies. The cookbook emphasizes using Nagios Core as an extensible monitoring framework. By the end of the book, you will learn that Nagios Core is capable of doing much more than pinging a host or to check if websites respond.
Table of Contents (18 chapters)
Nagios Core Administration Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Setting allowed client hosts for NRPE


In this recipe, we'll learn how to configure the NRPE daemon to answer requests from a particular IP address, typically the designated Nagios Core server or servers monitoring your network. This means that nrpe will not run plugins or return results for any check_nrpe request made from IP addresses not in this list.

This is an elementary security step in running an NRPE server. This should be done in concert with a hardware or software firewall and security policy. If your target host has interfaces or routes into untrusted networks, there is a risk of attackers making spurious requests for information about the system, clogging up your disk with logs from excessive check requests, or even possibly exploiting the nrpe daemon or the Nagios Plugins.

Getting ready

You should have a target host configured for checking in a Nagios Core 3.0 or later monitoring server. The target host should be running the nrpe daemon. You can verify that nrpe is running with...