Solved

LDAP query to Active Directory

Posted on 2010-09-22
4
1,382 Views
Last Modified: 2013-12-24
I have a Barracuda Spam firewall that is setup to perform LDAP lookups against AD to ensure that recipient names are valid.  However, that ability has somehow stopped and I'm not sure why.   Specifically, it was sending these queries to our Exchange server at port 389 (I believe).  At first I thought something must have gone wrong with the Barracuda and so I called tech support, however, after I was unable to telnet to port 389 and 3268 from within my network, I was told that the problem was with the Exchange server.  

What do I need to change to get this Exchange server to respond to LDAP requests (or telnet connections on those ports)?
0
Comment
Question by:tballin
[X]
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
4 Comments
 
LVL 35

Accepted Solution

by:
Joseph Daly earned 500 total points
ID: 33734686
I think you wouldnt be making an LDAP connection to your exchange server but rather one of your domain controllers. Try making a connection on port 389 to one of your DCs.
0
 
LVL 8

Expert Comment

by:Mkris9
ID: 33735290
With barracuda, the LDAP query always should go to the DC. if you have one server where your exchange server itself is your DC, then yes, it has to go to your exchange server.

Else it has to go to your DC. also Barracuda is normally set up on the DMZ. Pls check your firewall for DMZ > LAN settings and see if LDAP port is allowed and to which server
0
 

Expert Comment

by:afinneran
ID: 33735307
Unless you have AD running on your Exchange box I wouldn't think it would be handling the LDAP calls. Like xxdcmast said try to telnet to 389 on your DC. Also, if it just stopped working it could be security related. Any patches/ changes added to Barracuda or your DC's lately?
0
 

Author Comment

by:tballin
ID: 33744783
Well, I know I HAD it setup to go to my Exchange server, and it WAS working before.  Whatever the case though, xxdcmast's solution worked.  (And he was the first, so I'll give him the points)
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

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

Had a business requirement to store the mobile number in an environmental variable. This is just a quick article on how this was done.
This post looks at MongoDB and MySQL, and covers high-level MongoDB strengths, weaknesses, features, and uses from the perspective of an SQL user.
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.
Are you ready to implement Active Directory best practices without reading 300+ pages? You're in luck. In this webinar hosted by Skyport Systems, you gain insight into Microsoft's latest comprehensive guide, with tips on the best and easiest way…

734 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