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Re: Question to meta-backend / ldap-backend
Am Samstag 25 Oktober 2008 schrieb Dieter Kluenter:
> Wilhelm Meier <firstname.lastname@example.org> writes:
> > Hi,
> > I think this is a relative simple question but I did not use the
> > meta/ldap-backend before.
> > We have an openldap-server for user authentification. The user
> > bind as
> > uid=<user>,ou=Benutzer,dc=kmux,dc=de
> > where <user> is the actual username.
> > We have a diffent application where only users of a special
> > posixGroup "Archiv" should be valid. The application is not
> > capable of doing some sort of filtering.
> > So, I thought it must be passoble to do this filtering with the
> > meta or ldap-backup using the original ldap-db:
> > the filter should look like:
> > (&(cn=Archiv)(memberUid=<user>)(objectClass=posixGroup))
> > where <user> is the username as above.
> You don't provide an example of the applications searchstring, so
> only as a general hint, the rewrite engine of back-ldap, back-meta
> or back-relay might meet your requirements, man slapo-rwm(5), man
> slapd-meta(5), slapd-relay(5) provide some information.
The structure of the DIT is that we have the users below
ou=Benutzer,dc=kmux,dc=de with dn as described above. They are of
ObjectClass posixAccount, ...
Then we have the PosixGroups below ou=Gruppen,dc=kmux,dc=de, e.g.
cn=Archiv,ou=Gruppen,dc=kmux,dc=de. The posixGroup objectClass has
the user-objects as the multi-value attribute memberUid. This is the
normal case for pam-authentification.
My simple thought was to transparently "filter out" the user-objects
not belonging to the correct posixGroup: construct an DIT where all
non-"Archiv" user are not visible, for the example above.
The application users should then bind to the meta-ldap uri with a
different base-dn, e.g. ou=Archiv,dc=kmux,dc=de.
This leads to the generell problem to make all the users of posixGroup
xyz visible under the ou=xyz,ou=Gruppen, ...
Thanks in advance for any hints!