[Samba] Using LDAP, no PDC/BDC, for multiple samba servers

Soohoon Lee soohoon at gmail.com
Fri Aug 1 15:36:44 GMT 2008

'sharing LDAP server' is to share the same set of users/groups in the LDAP
DB, not separate sets of users/groups for each samba servers.
It looks like PDC ??? maybe what I want is more like NIS.
So IIUC, to share a single set of users/groups in the LDAP server from
multiple samba servers, I need LDAP and samba DC?
And samba servers have to join the samba DC by net rpc join?

Thanks a lot.

On Fri, Aug 1, 2008 at 11:22 AM, Adam Williams <awilliam at mdah.state.ms.us>wrote:

> sure you can have multiple domains with all the account info in LDAP.  if
> you really want it to work together well you'll have a PDC and BDC's
> though.  you may be able to try samba intertrust relationships, but i've
> never used that
> Soohoon Lee wrote:
> Thanks all
> This is my smb.conf
> [global]
>         dos charset = UTF-8
>         workgroup = DOMSMB
>         security = user
>         allow trusted domains = No
>         password server = NULL
>         passdb backend = ldapsam:ldap://
>         max log size = 50
>         load printers = No
>         stat cache = No
>         os level = 10
>         dns proxy = No
>         ldap suffix = dc=my-domain,dc=com
>         ldap user suffix = ou=Users
>         ldap group suffix = ou=Groups
>         ldap admin dn = cn=Manager,dc=my-domain,dc=com
>         ldap ssl = no
> And I like to make multiple samba servers to share single LDAP server
> without using domain controller feature.
> I'm getting feeling that pure LDAP server is for single samba server or the
> LDAP server should have samba DC to serve multiple samba servers?
> Thanks,
> Soohoon.
> On Fri, Aug 1, 2008 at 7:02 AM, Lukasz Zalewski <lukas at dcs.qmul.ac.uk>wrote:
>>  Lukasz Zalewski wrote:
>>> Adam Williams wrote:
>>>> are you using security = user or security = domain on your multiple
>>>> servers?
>>>> Soohoon Lee wrote:
>>>>> Hi
>>>>> Is it possible to use single LDAP server and multiple samba servers?
>>>>> The problem I'm having now is
>>>>> Each server thinks their host name is their LDAP domain name, or
>>>>> sambaDomainName, and
>>>>> complain the user's SID is different so can't authenticate.
>>>>> How do I make samba servers use one domain name and SID?
>>>>> LDAP domain name is DOMSMB
>>>>> dn: sambaDomainName=DOMSMB,dc=my-domain,dc=com
>>>>> sambaSID: S-1-5-21-2479917030-3150298425-213194246
>>>>> And samba server created a new domain after its hostname.
>>>>> dn: sambaDomainName=SRV6,dc=my-domain,dc=com
>>>>> sambaSID: S-1-5-21-4202146032-850913369-3381557932
>>>>> And complain user's SID is different from its SID.
>>>>> Thanks,
>>>>> Soohoon.
>>> We have student domain and staff domain and one LDAP server. We wanted
>>> staff members to log onto student domain. So we considered two options:
>>> 1. Interdomain trust relationship (
>>> http://us4.samba.org/samba/docs/man/Samba-HOWTO-Collection/InterdomainTrusts.html)
>>> However this option was not good for us as we didn't want to open up the
>>> firewall and we wanted staff members to get the proper student experience
>>> (i.e. home dirs and profiles on the student server). So that brought us to
>>> the second option:
>>> 2. ldap translucent proxy overlay (
>>> http://linux.die.net/man/5/slapo-translucent)
>>> In this setting we override sids (i.e. domain sid part of the staff
>>> domain is substituted with student domain portion of the sid) for users and
>>> groups and point samba to the overlay. Bear in mind that all of the changes
>>> make by samba like machine passwords, user passwords, idmap mappings etc
>>> will go no further than the proxy so great care must be taken in LDAP setups
>>> that use referrals.
>>> Now the most important question is what do you use you two domains for?
>>> HTH
>>> Lukasz
>> Ah sorry I didn't read the Subject line properly you do not want PDC. As
>> Andy pointed out maybe you should have one of the servers as a domain member
>> of the other domain
>> Lukasz

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