Microsoft KB Archive/832484

= FIX: DCOM communication uses many TCP/IP connections =

Article ID: 832484

Article Last Modified on 10/26/2005

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
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.



CAUSE
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 now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

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 usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
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



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section of this article.

