[Samba] Samba 4 replication causes bind dns to freeze

Marc Muehlfeld samba at marc-muehlfeld.de
Mon Feb 24 14:46:03 MST 2014

Hello Nikos,

Am 24.02.2014 21:49, schrieb Nikos Mitas:
> Joined a new samba 4 dc to an existing pair of samba 4 domain controllers,
> but i have a problem with replication.

Is the replication working before it hangs ('samba tool drs showrepl')?

> 5-10 minutes after starting samba services on the new samba 4 server,
> both   dns servers on the old Domain controllers freeze.  Nothing works.
> all i can do is to kill all the services (ntp,named,samba) and start over
> again.
> i get this message  on new dc in this file: /usr/local/samba/var/log.samba:
> ....
> dreplsrv_notify: Failed to send DsReplicaSync to
> 4d2038d4-3b1c-41a8-9865-142f7e9cadba._msdcs.example.com for
> .....
> environment:
> Redhat 6.5
> Bind with dlz v9.9.5

Which DNS server have you configured as primary in your old and new DCs 

Can you query the DNS on both hosts from each other?

Any firewall stuff prevent from accessing port 53?

Is the DLZ module for 9.9 enabled in /usr/local/samba/private/named.conf?

What Samba version are you running and is it self compiled or from where 
you got it?


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