Today we release a new extension: shorewall-monitor for Xymon:

If you run shorewall or shorewall-lite on your systems this may help you monitoring the state of your firewalls. It is installed as a local extension on the client and reports the state of shorewall, some metrics about the currently active ruleset (version, hashes, …) and optionally even the full ruleset.

Especially in environments with many (satellite) shorewall-lite installations Xymon can serve as a central point of information about their states and rulesets with this extension.

For more details see the project-page: shorewall-monitor for Xymon.