Nagios Support Forum

have you verified that the NSClient++ on the windows machine is running, the port is 'Listening' and it's not being blocked by the windows firewall?

That error means the plugin is missing or it's returning something that nagios can't understand. Check your service definition to see what command is being called by that service check and what args are being passed to it. Then open your commands.cfg file and see which plugin that command is calling...

I am having a problem where the 'last check time', 'next scheduled check' and 'last state change' fields for all of my services become a date in the future....some time in 2016. This has happened several times already and the only way I have found to fix it is to delete all of the prior check histor...