CHECK_NRPE: Received 0 bytes. Are we allowed to connect to the ho st?

[David Levine]

Hi all  -
 
I am having a bit of trouble with NRPE....
 
NRPE 1.8
nagios host: RH Linux 7.2
remote host: Solaris 8 x86
 
I am getting the error:
[nagios at vader libexec]$ ./check_nrpe -H obiwan -c check_oracle_pmon
CHECK_NRPE: Received 0 bytes.  Are we allowed to connect to the host?
 
I am running the NRPE daemon on the remote host as such:
[nagios at obiwan ~/bin]$./nrpe -c /opt/local/nagios/bin/nrpe.cfg --daemon
 
I can see that the remote host is listening on the correct port:
[nagios at obiwan ~/bin]$netstat -an | grep 5666
      *.5666               *.*                0      0 65536      0 LISTEN
192.168.100.78.5666  192.168.100.33.39932  5840      0 66608      0
TIME_WAIT
192.168.100.78.5666  192.168.100.33.39990  5840      0 66608      0
TIME_WAIT
 
However - I cannot see any PID associated with the NRPE daemon (output from
ps -ef)?
 
The command (plugin) that I am running on the remote host works fine:
[nagios at obiwan ~/libexec]$./check_oracle --db PRACTICE
PRACTICE OK - 1 PMON process(es) running
 
Here are (from what I can see) the relevant portions of nrpe.cfg:
allowed_hosts=127.0.0.1, 192.168.100.33
command[check_oracle_pmon]=/opt/local/nagios/libexec/check_oracle --db
PRACTICE
 
Configurations on my NAGIOS host:
checkcommands.cfg:
 
# 'check_nrpe' command definition
define command{
 command_name check_nrpe
 command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
 }
 
services.cfg:
 
# Service Description -- Verify Oracle instance is running (checking for
PMON)
define service{
 use    ti-template
 host_name   obiwan
 service_description  Oracle 8i PMON
 check_command   check_nrpe!check_oracle_pmon
 }
 
 
So...
Am I missing the obvious?
 
TIA for sharing any advice / experience...
 
-D
 
David Levine
Systems Administrator
Ticket Innovations, Inc.
1555 Mittel Blvd. Suite J
Wood Dale, IL 60191
Voice: 630-477-8329
Fax: 630-787-9951
dlevine at seasontickets.com <mailto:dlevine at seasontickets.com> 
 
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