[Nagiosplug-help] Problems with check_ntp_time v1.4.14 NTP CRITICAL: Offset unknown|

[Elie Delorme]

Hi Mike,
the servers have no software firewall (iptables is removed), we have a cisco
pix firewall between our local zones and it is configured to allow ntp
communications to/from the server hosting nagios and I haven't seen anything
bounce on the logs.

The ntp server is on the same server I have nagios installed on and remote
hosts have ntpd  configured to allow everything from it.

The problem isn't limited to one host, I have been receiving "Offset
unknown" statuses for different hosts at seemingly random rates today.

I can ntpq from the nagios server to "problematic" hosts and everything
seems fine :

[root at nagios-server ~]# ntpq 555.555.555.555
ntpq> peers
     remote           refid      st t when poll reach   delay   offset
 jitter
==============================================================================
 666.666.666.666  777.777.777.777     2 u   18   64   17    0.248   38.592
 27.076

IPs have been replaced:
555.xxx is the peer being checked
666.xxx is the server hosting nagios and the ntpd server
777.xxx is the remote ntp server we are using

On Wed, Feb 17, 2010 at 10:52 AM, Michael Saldivar <
mike.saldivar at advocatecreditrepair.com> wrote:

> On Wed, Feb 17, 2010 at 5:55 AM, Elie Delorme <elie at at-m.ca> wrote:
>
>> All servers I poll have the same ntp configuration, it looks like the
>> plugin can't handle some offsets,
>> most of the time everything is fine, then I randomly get an "Offset
>> unknown" for a server.
>>
>> I found a couple references to a bug involving a leap second, but they
>> were also saying that it should be corrected
>> in 1.4.12.
>>
>> I have tried restarting the ntp service a couple times but it did not help
>> a bit.
>> I also checked with ntpq and everything seems fine.
>>
>> My version is 1.4.14 ( latest available on sourceforge):
>> # /usr/local/nagios/libexec/check_ntp_time --help
>> check_ntp_time v1.4.14 (nagios-plugins 1.4.14)
>> Copyright (c) 2006 Sean Finney
>> Copyright (c) 2006-2008 Nagios Plugin Development Team
>>         <nagiosplug-devel at lists.sourceforge.net>
>>
>> Here is the output I get when executing the plugin from the command line:
>> # /usr/local/nagios/libexec/check_ntp_time -v -H xxx.xxx.xxx.xxx
>> sending request to peer 0
>> response from peer 0: offset -0.01565231133
>> sending request to peer 0
>> response from peer 0: offset -0.01617310685
>> sending request to peer 0
>> response from peer 0: offset -0.01564534893
>> sending request to peer 0
>> response from peer 0: offset -0.01622254931
>> discarding peer 0: stratum=0
>> overall average offset: 0
>> NTP CRITICAL: Offset unknown|
>>
>
> Have you checked the full time and date on these machines to make sure that
> they are actually correct?  Do they have a firewall rule blocking external
> NTP calls?
>
> -Mike
>
>
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