Icinga2 is a powerful monitoring system, and when used in a master-client model, it can replace the need for NRPE-based monitoring checks. The master-client model is more secure for [various reasons](https://www.icinga.com/docs/icinga2/latest/doc/06-distributed-monitoring/#security). It also allows for more distributed monitoring by allowing checks to be modified on one server and propagate to others. It also gives one centralized location for changes. For example: Let's say you have 4 differ......