What happens if you do a tcpdump sniff on your Ubuntu box?

tcpdump -i eth0 (or eth1 or whatever) port 123
You might have to sudo it on Ubuntu.

Jim
----- Original Message ----- 
From: "Maarten Deen" <[email protected]>
To: "timekeepers" <[email protected]>
Sent: Thursday, January 15, 2009 4:25 PM
Subject: [time] Trouble configuring ntp


>I just had my server crash and I'm now having trouble getting ntp to run
> properly again.
> It is Ubuntu 8.04 with normal ntp.
>
> On my machine everything seems to work. I can query ntp on the machine 
> itself
> and I get a time when I ask from a windows computer.
> But it does not seem to be accessible remotely.
>
> I've tried removing all restrict lines from ntp.conf (I did restart ntp), 
> but
> that does not seem to work. My firewall is configured to allow UDP port 
> 123
> pass. Yet, an ntpq -p results in a timeout.
>
> http://www.vanheusden.com/time/query_ntp_do.php tells me:
>
> Query NTP server
> If 82.95.91.106 is part of the NTP pool project, one can check its 
> performance here.
> Output of NTP server at 82.95.91.106
> ntpdate
>
> 15 Jan 23:16:23 ntpdate[7063]: ntpdate [email protected] Tue Sep 23 17:37:40 UTC 
> 2003 (1)
> server 82.95.91.106, stratum 0, offset 0.000000, delay 0.00000
>
>
> ntpq -c pe
>
>
> ntpq -crv
>
>
> ntpq -c ntpversion -c version
>
> NTP version being claimed is 2
> ntpq [email protected] Tue Sep 23 17:38:05 UTC 2003 (1)
>
>
> ntpq -c associations
>
>
> ntptrace
>
> maasluip.xs4all.nl: *Timeout*
>
>
> I'm at a loss here. Can anyone help?
>
> Maarten
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> 

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