[Samba] Samba 3.0.28a onwards "allow trusted domains" has no effect?

Hari Sekhon hpsekhon at googlemail.com
Wed Sep 10 10:50:58 GMT 2008

simo wrote:
> On Tue, 2008-09-09 at 15:52 +0100, Hari Sekhon wrote:
>> Hi,
>>    I've noticed a discrepancy between Samba Version 3.0.28a and Version 
>> 3.0.24 in relation to Winbind rid idmap and trusted domains behaviour.
>> I have an environment with 2 domains linked via a trust, an Active 
>> Directory domain and an NT4 domain. On 3.0.24 the rid backend seems to 
>> work fine, but on 3.0.28a it shows OTHERDOMAIN\domain admins instead of 
>> the primary domain's domain admins in uid/name mapping on files.
>> Below is a relevant snippet of the identical samba configuration on both 
>> machines:
>> allow trusted domains = no
>> idmap backend = rid
>> idmap config PRIMARYDOMAIN:range = 10000-19999
>> idmap config OTHERDOMAIN:range = 20000-29999
>> idmap gid = 10000-30000
>> idmap uid = 10000-30000
> Hari, this is not, as is, a valid configuration for either versions, is
> this the full configuration used ?
>> Testparm confirms that allow trusted domains is set to No, so it seems 
>> that 3.0.28a does not respect the fact that trusted domains are not 
>> supposed to be allowed at all? This seems to break the way the rid 
>> backend works of course as there is a rid clash with the other domain.
> Allow trusted domains = no controls only authentication/access to the
> service not id resolution.
>> This output from wbinfo --group-info shows the name clash:
>> domain admins:x:10512
>> OTHERDOMAIN\domain admins:x:10512
>> Can anyone offer any advice on what to do about this?
>> I am running 3.0.24 on Debian Etch and 3.0.28a on Gentoo, for which 
>> those are the latest stable versions packaged for the systems. I have 
>> tried 3.0.32 and the problem seems to occur there too. Is this a bug 
>> that has crept in after 3.0.24?
> If that is the configuration you use, it seem more like a configuration
> error.
> Simo.
It's not the entire configuration obviously I have left out lots of 
implicit options like security = ads etc, but I have been playing with 
using the rid idmap backend for unified id mapping across systems as 
mentioned in the samba official documentation (as it means I don't have 
to change my pre-R2 2003 Active Directory)

Testparm does not show any config error, the options are valid and 
appear in the global section of the dump of service configurations as 

This works absolutely as expected on 3.0.24 so far but on 3.0.28a and 
3.0.32 it seems a touch broken because of the cross domain collision id 


Hari Sekhon

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