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After installation, the package may be configured at Services > UPS.
The package does not have a lot of input validation in the webGUI. If NUT
will not start after configuration, check the System log from the pfSense®
webGUI from Status > System Logs) for log entries starting with
nut:. The culprit is likely explained there, such as selecting a cable
for a driver type that does not need (nor permit) the cable selection.
If the system log doesn’t offer adequate information, such as simply logging:
nut: Service failed to start: check configuration
Log in via SSH and choose option
8, then run the following command:
Configuration errors will be displayed in the output if any are found.
You can find a list of known issues with the NUT package on the pfSense bug tracker.