how to toubleshoot nagios check_nrpe issues?

Steps done: **On Nagios Server (CentOS 7)** yum install nagios nagios-plugins-all **On Target (CentOS 7)** yum install nrpe nagios-plugins-all modified nrpe.cfg and added master IP to allowed_hosts systemctl enable nrpe && systemctl start nrpe Now I'm trying to add a service check with check_nrpe so I defined host, contact, contactgroup then check_nrpe command nano /etc/nagios/objects/commands.cfg define command{ command_name check_nrpe command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$ } then added services for the nrpe check nano /etc/nagios/objects/services.cfg define service { use basic-new-service name check-load-service normal_check_interval 3 retry_check_interval 1 notification_interval 30 notification_options w,c,r,u check_command check_nrpe!check_load register 0 } define service { use check-load-service service_description SYS_HostLoad contact_groups Audit host_name TGT } nagios service started successfully systemctl enable nagios && systemctl start nagios I can verify check_nrpe returns Ok status directly from CLI # /usr/lib64/nagios/plugins/check_nrpe -H TGT -c check_load OK - load average per CPU: 0.00, 0.00, 0.01|load1=0.000;0.150;0.300;0; load5=0.002;0.100;0.250;0; load15=0.008;0.050;0.200;0; but in dashboard check_nrpe check is unable to succeed, due to permissions. (which I had already set as nagios:nagios for both /etc/nagios and /usr/lib64/nagios/plugins) it's showing this error on dashboard against this check (Return code of 13 for service 'SYS_HostLoad' on host 'TGT' was out of bounds)