Download of nagios-4.4.5.tar.gz (nagios-4.4.5.tar.gz ( external link: SF.net): 11,304,463 bytes) will begin shortly. If not so, click link on the left.
Nagios is a powerful, enterprise-class host, service, application, and network monitoring program. Designed to be fast, flexible, and rock-solid stable. Nagios runs on *NIX hosts and can monitor Windows, Linux/Unix/BSD, Netware, and network devices.