Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17


How possible is it to connect LDAP with two DC

Posted on 2011-09-21
Medium Priority
Last Modified: 2012-05-12
Dear Experts,

We have a library system called KOHA that uses ldap to connect to AC, only one server can be set on its ldap configuration to connect to active directory server.
We have two Active directory for different departments, how to make it to connect to both servers, is it done through windows, or has to be through LDAP

Question by:uknet80
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
  • 2
LVL 18

Accepted Solution

x-men earned 668 total points
ID: 36572467
if there are 2 distinct ADs, you'll need 2 connections because the root of the LDAP path is diferent
LVL 18

Expert Comment

ID: 36572476
If there is a trust relation between the domains, connect ot the one that is trusted by the other
LVL 13

Assisted Solution

khairil earned 1332 total points
ID: 36572514

If the domain is in same forest then make them both GC (global catalog).
Is Your AD Toolbox Looking More Like a Toybox?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.


Author Comment

ID: 36579521
Although I am not so familiar with windows trust relation, I would say there is trust between both servers as from one server I can connect to other AD.

If there is trust relation between both active directory A and B, and can connect from server A to B, then if I specify under LDAP client only Server A setting I should be able to connect to Active directory users on B Server.  Is that correct?

LVL 13

Assisted Solution

khairil earned 1332 total points
ID: 36581595
It still depend on how the client try to connect, having trust will make the authentication request some sort like "redirect" to other server.

But chaging the AD infra comes with risk, BIG RISK, in some situation it will break other things. It is better for you to change the KOHA checkpw class and extend the KOHA config for second LDAP (You can also hard coded the checkpw class).

This article is on KOHA problem with CN, you must repeat line 21 to 99 for different LDAP servers. This require you to have some PHP programming skill.

Other way to do is using LDAP proxy with multi sources, here is something on it, and here is how on KOHA with LDAP proxy (you still need a lot of modification to do), 

If you ask me what I will do? I cannot do Perl, and most likely I will chose to modified the calss.

Author Closing Comment

ID: 36889988
it look a bit complicated but I will go through it,

Featured Post

Creating Active Directory Users from a Text File

If your organization has a need to mass-create AD user accounts, watch this video to see how its done without the need for scripting or other unnecessary complexities.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A hard and fast method for reducing Active Directory Administrators members.
Let's recap what we learned from yesterday's Skyport Systems webinar.
This tutorial will walk an individual through the steps necessary to join and promote the first Windows Server 2012 domain controller into an Active Directory environment running on Windows Server 2008. Determine the location of the FSMO roles by lo…
Attackers love to prey on accounts that have privileges. Reducing privileged accounts and protecting privileged accounts therefore is paramount. Users, groups, and service accounts need to be protected to help protect the entire Active Directory …
Suggested Courses

722 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question