: Completely free and open-source under the GPL v2 license. It offers "unlimited" monitoring capability for those comfortable with manual configuration through files and plugins. Nagios XI Free Edition
Nagios XI is a popular network monitoring and management system used by organizations to monitor and manage their IT infrastructure. As a comprehensive monitoring solution, Nagios XI offers features such as monitoring of networks, servers, applications, and services. To use Nagios XI, users need to obtain a license key, which can be a significant expense, especially for large-scale deployments. nagios xi license key free
: If younagios.com/forum/viewtopic.php?t=6770">Nagios Sales Department to request a trial extension key. : Completely free and open-source under the GPL v2 license