I am using nagios for monitoring my infrastructure. the nagios server is on OEL 7 whereas the client is OEL 6. After setting up both the servers, i’m getting error “NRPE: Unable to read output”. The port 5666 is open from client. I am able connect the client as well using command “/usr/local/nagios/libexec/check_nrpe -H <IP_Address>” and getting the output as well.
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