This article explains how to create a free network monitoring tool using a virtual machine. Today I will introduce to you a free network monitoring software that is LibreNMS. My first impression is that LibreNMS has a nice and easy to use interface. The interface of LibreNMS is quite similar to Observium.
You monitor network devices with LibreNMS, and you want to get email notifications to your inbox every time a certain device loses connection. This article will solve that problem for you.