ntpd question : no server suitable for synchronization found

Florent Gilain florent.gilain at direct-energie.com
Tue Feb 27 08:21:25 CST 2007


Hello all,

I'm trying to synchronize all my RHEL3 servers with my Windows Domain
controllers, but i seem to miss something to get it work...any help would be
very cool ;-))

NB : Main office and Remote office server are connected using a VPN.

Here is my setup :

1) Main office :

Ntp servers are (DNS alias for real servers) :

	ntp.local (192.168.123.8)
	ntp2.local (192.168.123.10)

which are Windows 2000 or 2003 servers

2) Remote office (where are Linux servers...) :

[root at mx1 root]# cat /etc/ntp/ntpservers 
ntp.local
ntp2.local
clock.redhat.com
clock2.redhat.com

[root at mx1 root]# service ntpd stop 
Arrêt de ntpd :[  OK  ]

[root at mx1 root]# ntpdate ntp.local
27 Feb 14:49:58 ntpdate[6518]: step time server 192.168.123.8 offset
36.739053 sec

[root at mx1 root]# service ntpd start
ntpd : Synchronisation avec le serveur de temps :[  OK  ]
Démarrage de ntpd :[  OK  ]

[root at mx1 root]# tail /var/log/messages
Feb 27 14:49:04 mx1 ntpd[6455]: ntpd exiting on signal 15
Feb 27 14:49:04 mx1 ntpd: Arrêt de ntpd succeeded
Feb 27 14:49:50 mx1 ntpdate[6581]: step time server 192.168.123.10 offset
-36.740311 sec
Feb 27 14:49:50 mx1 ntpd:  succeeded
Feb 27 14:49:50 mx1 ntpd[6585]: ntpd 4.1.2 at 1.892 Tue Feb 24 06:32:25 EST
2004 (1)
Feb 27 14:49:50 mx1 ntpd: Démarrage de ntpd succeeded
Feb 27 14:49:50 mx1 ntpd[6585]: precision = 6 usec
Feb 27 14:49:50 mx1 ntpd[6585]: kernel time discipline status 0040
Feb 27 14:49:50 mx1 ntpd[6585]: frequency initialized 0.000 from
/var/lib/ntp/drift

So, all seems ok for the first server (mx1); but on the second one (mx2),
here is what i get :

[root at mx2 root]# cat /etc/ntp/ntpservers 
ntp.local
ntp2.local
clock.redhat.com
clock2.redhat.com

[root at mx2 root]# service ntpd stop 
Arrêt de ntpd :[  OK  ]

[root at mx2 root]# ntpdate ntp.local
27 Feb 14:55:23 ntpdate[25155]: step time server 192.168.123.8 offset
36.746627 sec

[root at mx2 root]# service ntpd start
ntpd : Synchronisation avec le serveur de temps :[ÉCHOUÉ]
Démarrage de ntpd :[  OK  ]

[root at mx2 root]# tail /var/log/messages
Feb 27 14:31:43 mx2 ntpd[22913]: ntpd exiting on signal 15
Feb 27 14:31:43 mx2 ntpd: Arrêt de ntpd succeeded
Feb 27 14:31:51 mx2 ntpdate[23385]: no server suitable for synchronization
found
Feb 27 14:31:51 mx2 ntpd:  failed
Feb 27 14:31:51 mx2 ntpd[23398]: ntpd 4.1.2 at 1.892 Tue Feb 24 06:32:25 EST
2004 (1)
Feb 27 14:31:51 mx2 ntpd: Démarrage de ntpd succeeded
Feb 27 14:31:51 mx2 ntpd[23398]: precision = 6 usec
Feb 27 14:31:51 mx2 ntpd[23398]: kernel time discipline status 0040
Feb 27 14:31:51 mx2 ntpd[23398]: frequency initialized 0.000 from
/var/lib/ntp/drift
Feb 27 14:42:36 mx2 ntpd[23398]: ntpd exiting on signal 15
Feb 27 14:42:36 mx2 ntpd: Arrêt de ntpd succeeded
Feb 27 14:56:26 mx2 ntpdate[25227]: no server suitable for synchronization
found
Feb 27 14:56:26 mx2 ntpd:  failed
Feb 27 14:56:26 mx2 ntpd[25239]: ntpd 4.1.2 at 1.892 Tue Feb 24 06:32:25 EST
2004 (1)
Feb 27 14:56:26 mx2 ntpd: Démarrage de ntpd succeeded
Feb 27 14:56:26 mx2 ntpd[25239]: precision = 10 usec
Feb 27 14:56:26 mx2 ntpd[25239]: kernel time discipline status 0040
Feb 27 14:56:26 mx2 ntpd[25239]: frequency initialized 0.000 from
/var/lib/ntp/drift

Thanks for your help

Florent
















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