Download in from Sourceforge
Many thanks to Henrik and the team!!!
There are plenty of improvements since previous release (and even from beta2), so upgrade could be tricky, but it worth it.
From Release Notes:
Xymon 4.3.0 is the first release with new features after the 4.2.0 release. Several large changes have been made throughout the entire codebase. Some highlights (see the Changes file for a longer list): * Data going into graphs can now be used to alter a status, e.g. to trigger an alert from the response time of a network service. * Tasks in xymonlaunch can be be configured to run at specific time of day using a cron-style syntax for when they must run. * Worker modules (RRD, client-data parsers etc) can operate on remote hosts from the xymond daemon, for load-sharing. * Support for defining holidays as non-working days in alerts and SLA calculations. * Hosts which appear on multiple pages in the web display can use any page they are on in the alerting rules and elsewhere. * Various new network tests: SOAP-over-HTTP, HTTP tests with session cookies, SSL minimum encryption strength test. * New "compact" status display can group multiple statuses into one on the webpage display. * Configurable periods for graphs on the trends page. * RRD files can be configured to maintain more data and/or different data (e.g. MAX/MIN values) * SLA calculations now include the number of outages in addition to the down-time.
Several minor issues with beta3 are already addressed in svn repository and in posts on the mailing list, but generally it works very stable ( I've tested it on FreeBSD and Opensolaris platforms)