The previous chapter provided information about Simple Network Management Protocol (SNMP) and how it can be used to monitor various devices with Nagios.

This chapter describes solutions that can be used to monitor a Microsoft Windows host and its services by installing and configuring a dedicated agent in the operating system. It shows how to communicate from the Nagios server to Windows machines, as well as the other way around.

This chapter also talks about how Nagios can be configured so that it notifies other Nagios instances about the current status of all hosts and services. These techniques can be used to create a central Nagios server that receives notifications from other machines.

In addition, this chapter covers the basics of setting up Nagios so that it handles problems when receiving information from other Nagios instances. If one of your Nagios monitoring systems is down or unreachable, you will want another Nagios instance to detect this and report...