Probs with check_ntp

[Ralf Mellis]

Hello, I'm working with nag 1.0, plugins 1.3 and nrpe 2.03b/1.8.
On my nrpe hosts (linux with 2.03b, hp-ux 11 with 1.8) I have setup a 
nrpe command in "nrpe.cfg" like

command[check_ntp]=/opt/nagios/libexec/check_ntp -H <fqdn2check-against>

where <fqdn2check-against> reflects the "ntp parent" of the according 
nrpe host. All ntp checks on my nag server are working correctly, but 
one fails permanently with the error:

CHECK_NRPE: Socket timeout after 10 seconds.

If I give the command locally on this host, I'm getting

NTP OK: Offset -0.000<xxx> secs

every time, the answer is within 5 to 6 seconds. The host with the 
problems is the one which is the primary time server for my whole 
network, it synchronises with the ntp servers "ptbtime.ptb.de" and 
"ptbtime2.ptb.de". The host is placed in a dmz, so there is a packet 
filter between this host and my nagios host. I have configured this 
filter to allow nrpe communication successfully because there are some 
other nrpe commands which are processed correctly.

The version of check_ntp is:

check_ntp (nagios-plugins 1.3.0) 1.14

Where is the problem? And is there a possibility to increase the timeout 
value?

Regards

-- 
Ralf Mellis
Abt. DV/ORG
Kisters Maschinenbau GmbH
Germany
47533 Kleve
Boschstr. 1-3
Tel. +49(0)2821-503-0
Fax  +49(0)2821-26110




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