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 the listening address for NRPE


In this recipe, we'll learn how to make NRPE listen on a specific IP address on a target host. This might be done on hosts with multiple interfaces in order to prevent spurious requests made to the nrpe daemon from untrusted interfaces, perhaps the public Internet. It could also be appropriate for configuring the daemon only to listen on a trusted VPN interface.

This setup can be particularly useful when the server has an interface into a dedicated management network to which the monitoring server also has access, preventing the nrpe daemon from responding to requests on other interfaces unnecessarily, and thereby closing a possible security hole.

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, and listening on all interfaces (which we'll fix). You can verify that nrpe is running with pgrep or ps:

# pgrep nrpe
29964
# ps -e | grep [n...