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FIX: DCOM communication uses many TCP/IP connections

This article has been archived. It is offered "as is" and will no longer be updated.
After you install Microsoft Windows 2000 Service Pack 4 (SP4), or you apply any Microsoft COM+ Rollup Hotfix that is later than COM+Rollup Hotfix Package 20, you may notice many TCP/IP connections to port 135.
A change in DCOM that was first made in COM+ Rollup Hotfix Package 21 causes a part of DCOM to use the Negotiate security package instead of the NTLM security package. The Negotiate package does not have correct credential pooling logic, forcing DCOM to create many connections in some situations.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


You must have Microsoft Windows 2000 Service Pack 3 (SP3) or later installed on your computer.

Restart requirement

You must restart your computer after you apply this hotfix.

File information

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date         Time   Version        Size       File name   ----------------------------------------------------------   08-Dec-2003  23:48  5.0.2195.6824    124,688  Adsldp.dll   08-Dec-2003  23:48  5.0.2195.6824    132,368  Adsldpc.dll   08-Dec-2003  23:48  5.0.2195.6824     63,760  Adsmsext.dll   08-Dec-2003  23:48  5.0.2195.6876    381,712  Advapi32.dll   08-Dec-2003  23:48  5.0.2195.6866     69,904  Browser.dll   08-Dec-2003  23:48  5.0.2195.6824    136,464  Dnsapi.dll   08-Dec-2003  23:48  5.0.2195.6876     96,528  Dnsrslvr.dll   08-Dec-2003  23:48  5.0.2195.6866     47,376  Eventlog.dll   08-Dec-2003  23:48  5.0.2195.6871    148,240  Kdcsvc.dll   08-Dec-2003  23:28  5.0.2195.6881    206,096  Kerberos.dll   21-Sep-2003  00:32  5.0.2195.6824     71,888  Ksecdd.sys   08-Dec-2003  23:30  5.0.2195.6881    511,248  Lsasrv.dll   08-Dec-2003  23:30  5.0.2195.6881     33,552  Lsass.exe   17-Oct-2003  00:33  5.0.2195.6866    114,960  Msv1_0.dll   08-Dec-2003  23:48  5.0.2195.6866    307,984  Netapi32.dll   08-Dec-2003  23:48  5.0.2195.6863    361,232  Netlogon.dll   08-Dec-2003  23:48  5.0.2195.6874    931,600  Ntdsa.dll   08-Dec-2003  23:48  5.0.2195.6876    392,464  Samsrv.dll   08-Dec-2003  23:48  5.0.2195.6824    113,936  Scecli.dll   08-Dec-2003  23:48  5.0.2195.6824    259,856  Scesrv.dll   06-Nov-2003  22:29  5.0.2195.6870  5,847,552  Sp3res.dll   08-Dec-2003  23:48  5.0.2195.6824     48,912  W32time.dll   21-Sep-2003  00:32  5.0.2195.6824     57,104  W32tm.exe   08-Dec-2003  23:48  5.0.2195.6869    126,224  Wldap32.dll
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.
For additional information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:
816915 New file naming schema for Microsoft Windows software update packages
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Article ID: 832484 - Last Review: 10/26/2013 20:21:19 - Revision: 1.6

Microsoft Windows 2000 Server, Microsoft Windows 2000 Professional Edition, Microsoft Windows 2000 Advanced Server

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