Setting of Samba Primary Group SID after 3.0.23 (SAMBA) (LDAP)

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Environment

SUSE Linux Enterprise Server 10
SUSE Linux Enterprise Server 9

Situation

After an update to Samba > 3.0.23 the setting "Primary Group SID" for any user in Samba seems to be 513, for example

pdbedit -v -u test5

gives for user test5

Primary Group SID: S-1-5-21-2832020676-840558856-594110992-513

and no matter what you try to change this seems to be fixed. This was changed in Samba 3.0.23. The primary group is no longer taken from the SambaPrimaryGroupSID attribute, because of issues with conflicts between the unix primary group and the samba primary group.

But you would like to have a few users be actually members of the Domain Admin Group, but this would require a RID of 512.

Resolution

To solve this issue an example. You would like to have a user be member of the Domain Admin Group, RID 512. For this you first create a new group in LDAP, lets call it ntadmin. This gets the gidnumber of 512. Then you issue

net groupmap add rid=512 unixgroup=512

and then check

net groupmap list

should give

512 (S-1-5-21-2832020676-840558856-594110992-512) -> ntadmin

then you change the gidnumber of the user (in my test this is test6) to 512 in LDAP and then you check with

pdbedit -v -u test6

and get finally

Primary Group SID: S-1-5-21-2832020676-840558856-594110992-512

Disclaimer

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