Dejal Systems has announced Simon 4.2 (http://www.dejal.com/simon/), an update to their server monitoring tool for Mac OS X.

The software checks web pages, FTP and DNS servers, local or remote ports or volumes, and other kinds of services for changes or failures. HTML reports enable remote viewing of a summary and/or details of Simon monitoring. Version 4.2 includes new exclusion and difference analysis filters, email, preview and reports improvements, and more.

Simon 4.2 requires Mac OS X version 10.10. It’s available for $99. This is a free update for licensed Simon 4 users, with upgrades from version 3 available for $49. A demo is available for download.