TCP Connections Left Open After Using LDAP Search

ID: Q221807

The information in this article applies to:

SYMPTOMS

When you use either Microsoft Outlook Express or Microsoft Outlook in Internet Only mode, one network connection to a Lightweight Directory Access Protocol (LDAP) version 2.0 server is not closed after you perform a Find People search. This issue results in multiple open connections on the LDAP server.


CAUSE

This issue occurs because the LDAP search component attempts a connection to the LDAP server using the LDAP version 3 protocol. A server using LDAP version 2 responds with a protocol error since it does not support LDAP version 3. The search component then opens another Transmission Control Protocol (TCP) connection to the server and binds to it, but does not close the first connection.


RESOLUTION

A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Internet Explorer service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp
The English version of this fix should have the following file attributes or later:
Date Time Version Size File name Platform
02/26/99 04:36p 4.72.3110.0 292,756 3511.exe (x86)

This file is a self installing executable. The replaced wab32.dll file has the following attributes:

Date Time Version Size File name Platform
02/26/99 02:32p 4.72.3514.2600 414,416 wab32.dll (x86)

NOTE: If this product was already installed on your computer when you purchased it from the Original Equipment Manufacturer (OEM) and you need this fix, please call the Pay Per Incident number listed on the above Web site. If you contact Microsoft to obtain this fix, and if it is determined that you only require the fix you requested, no fee will be charged. However, if you request additional technical support, and if your no-charge technical support period has expired, or if you are not eligible for standard no-charge technical support, you may be charged a non-refundable fee.

For more information about eligibility for no-charge technical support, see the following article in the Microsoft Knowledge Base:
Q154871 Determining If You Are Eligible for No-Charge Technical Support


STATUS

Microsoft has confirmed this to be a problem in Internet Explorer 4.0.

Additional query words: ack fin TCP IP 4.00 


Keywords          : kbnetwork msiew95 msient 
Version           : WINDOWS:3.02,4.01 Service Pack 1
Platform          : WINDOWS 
Issue type        : kbprb

Last Reviewed: July 22, 1999