NRPE: Unable to read output

Please read the nrpe.cfg file. It states:

ALLOWED HOST ADDRESSES

This is a comma-delimited list of IP address of hosts that are allowed

to talk to the NRPE daemon.

NOTE: The daemon only does rudimentary checking of the client’s IP

address. I would highly recommend adding entries in your

/etc/hosts.allow file to allow only the specified host to connect

to the port you are running this daemon on.

NOTE: This option is ignored if NRPE is running under either inetd or xinetd

I have to assume that you are in fact using inetd or xinetd.
I would comment out that line, if in fact, you are using inetd or xinetd.

I am running it like this.
nrpe -n -c /etc/nagios/nrpe.cfg -d

OK I finally got it I needed to finish the setup of nrpe adding the lines to service and hosts.allow that kind of thing.
Thank you very much you all were a huge help.