OpenLDAP + User Authentication

[Ryan Golhar]

I'm a little confused on how this is going to happen.  Here's what we
have:

First LDAP server has a base DN of: o=InformaticsInstitute,o=UMDNJ,c=US
Second LDAP server has a base DN of: o=research.umdnj.edu,o=umdnj.edu

Some users will be unique to the first LDAP, other users will be unique
to the second LDAP, and some might overlap.  Here's an example of a user
the first LDAP directory and the second LDAP directory:

uid=someuser,ou=People,o=InformaticsInstitute,o=UMDNJ,c=US

uid=someuser,ou=People,o=research.umdnj.edu,o=umdnj.edu

How am I going to combine these two directories into one?  Other than
the base DN difference, the users are both in ou=People.  I could just
dump all the users from one LDAP directory into the other, but I want to
make sure I'm doing things right.

The other problem is that I doubt this other dept will grant us admin
access to their ldap server and doubtful they will give up their ldap
server to use ours.  I don't want to manage this stuff, so I'll go with
theirs.  

If we set up a separate tree on their server for our users, how can we
add their users from "ou=People,o=research.umdnj.edu,o=umdnj.edu" to be
able to access our resources when our machines authenticate users from
"ou=People,o=InformaticsInstitute,o=UMDNJ,c=US"?

Am I thinking about this correctly? 

Ryan


-----Original Message-----
From: Bliss, Aaron [mailto:ABliss at preferredcare.org] 
Sent: Monday, January 30, 2006 8:07 PM
To: job at ccbmail.ccbox.com; General Red Hat Linux discussion list;
golharam at umdnj.edu
Subject: RE: OpenLDAP + User Authentication


It really isn't very efficient attempting to maintain two separate
directories; shame on the other department for setting up that other
ldap server; best thing to do is to reconcile user and groups to 1 ldap
server and migrate the member servers that are authenticating against
the rogue ldap sever to yours after reconciling both. 

-----Original Message-----
From: redhat-list-bounces at redhat.com
[mailto:redhat-list-bounces at redhat.com] On Behalf Of Job Cacka
Sent: Monday, January 30, 2006 7:47 PM
To: golharam at umdnj.edu; General Red Hat Linux discussion list
Subject: RE: OpenLDAP + User Authentication

It may be possible to accomplish this, but you have a bigger problem
than that. Who is ultimately responsible for your network? They should
be the one that should have the authority to fix this. If No One person
is sresponsible for Network services then you will have many problems
like this in the future.

Alternatively, You have a few choices.
1. Do what you propose = Alot of work and research and it may not be a
success 2. Combine the two LDAP servers into one server with two trees
make sure to use the least expensive non-proprietary server. 3. Install
two routers and break the departments out of the sharing the same
network. This is only cost effective if it prevents problems like this
in the future. It may break other services too.

BTW shame on the other guy for not checking the services that were
running first before installing the same one. How many resources did he
waste of the organizations' time and money by not doing his homework.

Job Cacka

-----Original Message-----
From: redhat-list-bounces at redhat.com
[mailto:redhat-list-bounces at redhat.com]On Behalf Of Ryan Golhar
Sent: Monday, January 30, 2006 1:45 PM
To: 'General Red Hat Linux discussion list'
Subject: OpenLDAP + User Authentication


I have an LDAP server which I'm using to authenticate my users from.
Recently, another dept here put their own LDAP server in place with a
different set of users that may/may not be in my LDAP.

What I'd like to do is have my machines attempt to authenticate a user
from my LDAP, and if the user doesn't exist, have the LDAP refer to the
other dept's LDAP server.  Is this possible with LDAP?  If so, can
anyone point me to where I can read up on this?  I found a little
information on superior referrals, but no detailed information on how it
works.

Ryan

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