This is a repackaged open source software product wherein additional charges apply for support.Nagios is a robust open-source monitoring system that serves as a critical tool for system administrators and IT teams. It offers comprehensive monitoring capabilities to oversee various aspects of an organization's IT infrastructure, including servers, switches, applications, and services. Nagios operates by utilizing a set of plugins that perform specific checks and tests on designated resources. These checks could involve assessing server availability, CPU usage, memory consumption, network connectivity, and more.