Microsoft KB Archive/193419

= IIS Registry Setting ReplyWithHTTP1.1 May Cause Problems =

Article ID: 193419

Article Last Modified on 9/22/2005

-

APPLIES TO


 * Microsoft Internet Information Server 4.0

-



This article was previously published under Q193419



We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx



SYMPTOMS
If you set the following registry setting:

  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3SVC\Parameters \ReplyWithHTTP1.1 REG_DWORD to 0 (zero)

Internet Information Server (IIS) 4.0 will still use HTTP 1.1 features (such as chunked transfer encoding). This may cause problems on the client such as TCP connections remaining open that the client assumes will be closed, and the client displaying the chunk lengths as part of the HTML (because it is not expecting chunked content from a 1.0 server).



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack



STATUS
Microsoft has confirmed this to be a problem in Internet Information Server version 4.0. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.

Additional query words: IIS hotfix hot fix qfe quick engineering patch

Keywords: kbbug kbfix kbqfe kbhotfixserver KB193419

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.