I've installed the nrpe plugin in the monitoring host as per the NRPE USER GUIDE instructions.
When I use the command :
/usr/local/nagios/libexec/check_nrpe -H 192.168.0.1
to make sure the check_nrpe plugin can talk to the NRPE daemon on the remote host, I get the error :
CHECK_NRPE: Error - Could not complete SSL handshake.
Assumption : 192.168.0.1 is the remote host address.
The nrpe daemon works successfully in the remote host.