The plugin outputs the configured firewall status and with the check rules you can define a wanted state. If nothing is defined then only the current state will be shown.
Changelog:
2.2.0 - migrated to CMK 2.2 with some smaller fixes (typos and so on)
2.3.0 - CMK 2.3 ready
2.3.1 - small bug in bakery fixed
2.3.2 - fix typo in rule
2.4.0 - migrated to CMK 2.3 API - Attention - incompatible change - rules needed to be created new
2.4.1 - small formatting issues
2.4.2 - migrate function for old rules
Version 2.4.4
Latest version
Note: This version requires Checkmk version 2.0.0 or higher.