[Samba] Domain trusts "forgetting" trusted users

Gaiseric Vandal gaiseric.vandal at gmail.com
Fri Oct 9 15:12:34 MDT 2009

I am running Samba ver 3.0.33 on Solaris 10 (sparc) as a PDC with LDAP
for the backend for both samba and unix accounts.

I have also set up a trust with an Windows domain-  lets call it
WINDOMAIN-   (the PDC for the Windows domain is Win 2003 but is in
mixed mode for backwards compat.)  The SAMBA domain trusts the WINDOWS
domain, not not vice versa.

I had also tried setting up trusts with another, test domain (lets
call it TESTDOMAIN.)

I have winbind enabled.  Initially idmap entries were stored in the
local tdb backend.    I switched this to ldap  (wanted idmappings with
in the domain to be consistent across member servers, and wanted to
add a BDC.)

smb.conf includes


       passdb backend = ldapsam:ldap://ldap1.mydomain.com
      ldap suffix=o=mydomain.com
      ldap user suffix=ou=people
      ldap group suffix=ou=smb_groups
      ldap machine suffix=ou=machines
      ldap admin dn="cn=Directory Manager"
      ldap ssl = no
      ldap passwd sync = no
      ldap idmap suffix=ou=idmap

     winbind enum users = Yes
     winbind enum groups = no
     winbind use default domain = no
     winbind trusted domains only = no

      #ldap time out default is 15 sec
      ldap timeout=30

    # idmap domains = WINDOMAIN, TESTDOMAIN
      idmap domains = WINDOMAIN

     idmap config WINDOMAIN:backend = ldap
     idmap config WINDOMAIN:readonly = no
     idmap config WINDOMAIN:default=no
     idmap config WINDOMAIN:ldap_base_dn = ou=windomain,ou=idmap,o=mydomain.com
     idmap config WINDOMAIN:ldap_user_dn = cn=Directory Manager
     idmap config WINDOMAIN:ldap_url =ldap1.mydomain.com
     idmap config WINDOMAIN:range = 30000-39999

     #idmap config TESTDOMAIN:backend = ldap
     #idmap config TESTDOMAIN:readonly = no
     #idmap config TESTDOMAIN:default=no
     #idmap config TESTDOMAIN:ldap_base_dn =
     #idmap config TESTDOMAIN:ldap_user_dn = cn=Directory Manager
     #idmap config TESTDOMAIN:ldap_url =ldap1.mydomain.com
     #idmap config TESTDOMAIN:range = 40000-49999

     idmap alloc backend = ldap
     idmap alloc config:ldap_base_dn = ou=alloc,ou=idmap,o=mydomain.com
     idmap alloc config:ldap_user_dn = cn=Directory Manager
     idmap alloc config:ldap_url = ldap1.mydomain.com
    idmap alloc config:range = 70000 - 79999


getting the correct (or mostly correct syntax) took a little while.
/etc/nsswitch.conf is configured for winbind.

When I first run "wbinfo -u" and "wbinfo -g", samba would populate
entries for the WINDOMAIN account in
windomain,ou=idmap,o=mydomain.com.    The id's would be in the 70000
range not the 30000 range-   which is fine with me since entries for
each domain were still in the correct ldap container.

"getent passwd" and "getent group" would show the WINDOMAIN domain
accounts.  Everything would be fine for several days.  However, after
a few days, getent commands no longer showed the WINDOMAIN accounts.

The only solution would be to stop windbind, delete the idmap entries
from ldap, restart winbind and let the entries repopulate.

Any thoughts?


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