Nagios Support Forum

We attempted an upgrade to Nagios XI 5.5.2 from 5.4.13. Our checks return "unknown" with the following attached error messages about packet versions. Was there some API upgrade that now requires our client NRPE services to be upgraded to a newer version?

We are running NRPE 2.12 client.

From the Web UI, inspecting one of the checks returning unknown provides a message "Could not construct return packet in NRPE handler check client side (nsclient.log) logs...

Thanks,
Steve

See attached log entries "check_nrpe does not support Version 3 packets"

Try the solutions listed in our KB article below:

https://support.nagios.com/kb/article/n ... s-786.html

Let us know if this helped.