Microsoft KB Archive/221807

= TCP Connections Left Open After Using LDAP Search =

Article ID: 221807

Article Last Modified on 10/7/2005

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APPLIES TO


 * Microsoft Internet Explorer 4.01 Service Pack 1
 * Microsoft Internet Explorer 4.01 Service Pack 1
 * Microsoft Internet Explorer 3.02

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This article was previously published under Q221807



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 is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Internet Explorer service pack that contains this hotfix.

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 about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:

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



STATUS
Microsoft has confirmed that this is a problem in Internet Explorer 4.0.

Additional query words: ack fin TCP IP 4.00

Keywords: kbnetwork kbprb KB221807

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