CentOS - Nov 2008 - NTP problems

My server is supposed to be using ntp, with nothing changed from the defaults 
set up by CentOS5.  However, daily I see log entries like

 Total synchronizations 2 (hosts: 2)
 
 **Unmatched Entries**
   sendto(193.6.222.20) (fd=21): Invalid argument: 1 time(s)
   sendto(141.89.226.2) (fd=21): Invalid argument: 1 time(s)

Does this mean that ntp is failing?  I assume so, and if so, how do I change 
the sources to something that will work?

Anne
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Anne Wilson wrote:

Hello.
>  **Unmatched Entries**
>    sendto(193.6.222.20) (fd=21): Invalid argument: 1 time(s)
>    sendto(141.89.226.2) (fd=21): Invalid argument: 1 time(s)
> 
> Does this mean that ntp is failing?  I assume so, and if so, how do I
> change the sources to something that will work?
Does this happens after a reconnect with your provider and getting a new
ip address?
If so, then yes. I have had this problem also a long time ago. The
following command works for me in /etc/ppp/ip-up.local.

# restart time service cause of new ip from provider
/etc/rc.d/init.d/ntpd restart


regards
Olaf

Anne,

please check your /etc/ntp.conf for the "server" statement; CentOS
original
is
> server 0.rhel.pool.ntp.org
> server 1.rhel.pool.ntp.org
> server 2.rhel.pool.ntp.org
These 2 server ips you listed do not belong to this pool (you can check via 
dns), and resolved backwardly their names do not sound like they are ntp 
servers.

You should find out why your ntp tries to send to them (and what).

The "total synchronizations ..." line at least seems to say that your
ntp
sync works - you could check that with ntpdate against a server from the 
above pool to be sure.

Dirk

--On 15. November 2008 09:54:19 +0000 Anne Wilson 
<cannewilson at googlemail.com> wrote:
> My server is supposed to be using ntp, with nothing changed from the
> defaults  set up by CentOS5.  However, daily I see log entries like
>
>  Total synchronizations 2 (hosts: 2)
>
>  **Unmatched Entries**
>    sendto(193.6.222.20) (fd=21): Invalid argument: 1 time(s)
>    sendto(141.89.226.2) (fd=21): Invalid argument: 1 time(s)
>
> Does this mean that ntp is failing?  I assume so, and if so, how do I
> change  the sources to something that will work?
>
> Anne


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Dirk H. Schulz
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Fax. 0 80 92/86 25 72
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