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Re: [Samba] visibility of groups when multiple Samba servers use the same LDAP server

Am 11.02.19 um 13:22 schrieb Rowland Penny via samba:
On Mon, 11 Feb 2019 12:30:51 +0100
Matthias Leopold via samba <samba@xxxxxxxxxxxxxxx> wrote:


we are using a _single_ LDAP server as backend for _multiple_ Samba
standalone file servers (security=user). This LDAP server serves
mainly other purposes and access for Samba is read only so the
situation is not optimal but "it works for us". Still I don't
understand one phenomenon concerning visibility of LDAP groups.

The LDAP configuration in smb.conf for all our Samba servers is
basically like this (with each server having it's own branch for
"ldap group suffix", that's the point):

passdb backend = ldapsam:ldap://ldap.domain.tld
ldap suffix = dc=domain,dc=tld
ldap user suffix = ou=people
ldap group suffix = ou=server01,ou=smb,ou=Groups

NSS uses LDAP via SSSD like this:

id_provider = ldap

ldap_uri = ldap://ldap.domain.tld
ldap_search_base = dc=domain,dc=tld

ldap_user_search_base = ou=People,dc=domain,dc=tld
ldap_group_search_base = ou=server01,ou=smb,ou=Groups,dc=domain,dc=tld

The sambaDomainName is stored in an entry in LDAP path
ou=smb,dc=domain,dc=tld. Each server has it's own entry, but all use
the same SID.

This setup is not exactly pretty, but it "works". Still, unexpectedly
Samba on server01 sees groups in other branches than
"ou=server01,ou=smb,ou=Groups" (with "net groupmap list").

- group is cn=testgroup,ou=server02,ou=smb,ou=Groups,dc=domain,dc=tld
- on server01 this group is visible with "net groupmap list
- "getent group testgroup" does not work (as expected)
Why is this?


You are going to have to give us more info ;-)
What OS's ?
What version(s) of Samba ?
Have there been any updates/upgrades to anything ?


thx for quick reply.
Samba is 4.8.3 on CentOS 7.
LDAP server is IBM Tivoli Directory Server on AIX.
The situation has always been like this, upgrades didn't change anything.


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