[Samba] Rights issue on GPO

Rowland penny rpenny at samba.org
Mon Jun 20 18:10:01 UTC 2016

On 20/06/16 18:49, lingpanda101 at gmail.com wrote:
> On 6/20/2016 1:19 PM, lists wrote:
>> Hi all,
>> Following this thread with interest, as we are also having some 
>> issues with GPO (they work on and off, unpredictably)
>> We checked iddap.ldb on the DCs and noticed differences between DCs.
>> We would like to ask some questions:
>> On 10-6-2016 9:26, Rowland penny wrote:
>>> Well, it is and it isn't, yes winbindd will display the user & group
>>> names for sysvol, but sysvol still isn't replicated between DCs. I 
>>> think
>>> this means that when you sync sysvol manually, you will get the ID's
>>> from the first DC applied to sysvol on the second DC and if there is a
>>> difference in ID numbers between the DC's, you will either just get a
>>> number or, even worse, a wrong name returned.
>>> I could be wrong, but I still think you need to keep idmap.ldb in sync
>>> on all DCs, if you are syncing sysvol.
>> We are on sernet-samba-4.4.4 on the DCs, and "winbindd -D" is running 
>> on DCs.
>> We understand we need to keep idmap.ldb in sync. We did this in the 
>> past, but it seems they have gotten out of sync again.
>> One question: HOW OFTEN do we need to do manually sync the imap.ldb 
>> files? After each and every regular user addition/deletion?
>> We are currently on sernet-4.4.4 on the 3 DCs, but on our fileserver 
>> we are still on samba 4.2.11 and sssd. Would that last bit have any 
>> impact on the GPO situation..? (i don't think so, because GPOs are on 
>> the DCs and not on the fileserver..?)
>> Since our idmap.ldb differs per DC, HOW to choose which one to copy 
>> to the other DCs? Choosing wrongly will probably have major 
>> implications..?
>> Sorry to ask so many questions, hopefully someone will answer.
>> Best regards,
>> MJ
> Mine are also out of sync. Using Samba 4.4.4 on Ubuntu 12.04. I no 
> longer keep the idmap.ldb in sync as I thought this was no longer 
> needed since version 4.2 or greater unless using winbind.
> I also never would reset sysvol on the other DC's when replicating 
> using rsync. I don't believe it was ever in the wiki. Clarification 
> from someone would be helpful.

If you use Samba < 4.2.0 with the 'winbind' part of the 'samba' binary, 
then you had to, but if you use Samba >= 4.2.0, then this uses the 
separate 'winbindd' binary and this will map the BUILTIN users & groups 


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