Nagios (formerly Netsaint) is a daemon written in C that is designed to monitor networked hosts and services. It has the ability to notify contacts (via email, pager or other methods) when problems arise and are resolved. Host and service checks are performed by external "plugins", making it easy to write custom checks in your language of choice. Several CGIs are included in order to allow you to view the current and historical status via a Web browser, and a WAP interface is also provided to allow you to acknowlege problems and disable notifications from an internet-ready cellphone.
Release Notes: A problem where disabling all active hosts/services was not taking effect was fixed. Code cleanup was done. The logging code format was fixed.
Release Notes: Several bugfixes, including service check scheduling and daylight savings times reporting.
Release Notes: A new feature was added to check for new Nagios releases. Several bugs were fixed with event handler logging, embedded perl, CPU hogging issues under OpenBSD, timeperiod calculation routines, scheduling checks from the Web interface, and the handling of problem states after Nagios restarted.
Release Notes: Security fixes related to CGI submission of external commands and processing of adaptive data commands. x509 certificate authentication support and wildcard host matching in CGIs were added. Minor improvements were made to the RPM spec file, out-of-disk-space error handling, and system command timeout handling.
Release Notes: A security fix was made for Cross Site Request Forgery (CSRF). New documentation on CGI security recommendations was written. Fixes were made for AIX compiler warnings, sample configuration file variables, the RPM spec file, and a multiline continuation bug.