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

Soohoon Lee soohoon at gmail.com
Fri Aug 1 14:59:00 GMT 2008

Thanks all
This is my smb.conf
        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?


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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