Solved

LDAP query to Active Directory

Posted on 2010-09-22
4
1,378 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
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

Control application downtime with dependency maps

Visualize the interdependencies between application components better with Applications Manager's automated application discovery and dependency mapping feature. Resolve performance issues faster by quickly isolating problematic components.

Question has a verified solution.

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

Lotus Notes – formerly IBM Notes – is an email client application, while IBM Domino (earlier Lotus Domino) is an email server. The client possesses a set of features that are even more advanced as compared to that of Outlook. Likewise, IBM Domino is…
This process describes the steps required to Import and Export data from and to .pst files using Exchange 2010. We can use these steps to export data from a user to a .pst file, import data back to the same or a different user, or even import data t…
This tutorial will walk an individual through the process of transferring the five major, necessary Active Directory Roles, commonly referred to as the FSMO roles from a Windows Server 2008 domain controller to a Windows Server 2012 domain controlle…
This video discusses moving either the default database or any database to a new volume.

911 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

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now