Web Proxy Sends TCP Reset Instead of Only Closing Session (317122)

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

SYMPTOMS

You may receive the following error message in your Web browser program (such as Microsoft Internet Explorer, NetScape Navigator, and so on) when you are posting data to a Web site:

The connection was reset by the server

The browser clients are connecting to the Web sites through an Internet Security and Acceleration (ISA) Server Web proxy server. Subsequent attempts to repost the data may work.

RESOLUTION

NOTE: You must apply ISA Server 2000 Service Pack 1 before you can apply the following hotfix. If you have already applied ISA Server 2000 Service Pack 1, you do not need to do so again.

For information about how to obtain ISA Server 2000 Service Pack 1, click the article number below to view the article in the Microsoft Knowledge Base:

313139 How to Obtain the Latest Internet Security and Acceleration Server 2000 Service Pack

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next ISA Server 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/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 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:

   Date       Time      Version       Size     File name
   -------------------------------------------------------
   27-Feb-02  13:10:39  3.0.1200.170  383,760  W3proxy.exe

WORKAROUND

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

This problem has only been reproduced when the browser sends an extra CR/LF character in the data that is not accounted for in the content-length in the packet. If the browser is Internet Explorer version 5.01 Service Pack 2 (SP2) or 5.5 SP2, the sending of the extra CR/LF can be disabled by editing the following registry key:

Start Registry Editor (Regedt32.exe).
Locate and then click the following key in the registry:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\
On the Edit menu, click Add Value, and then add the following registry value:
Value name: SendExtraCRLF
Data type: REG_DWORD
Radix: Decimal
Value data: 0
Quit Registry Editor.

Web Proxy Sends TCP Reset Instead of Only Closing Session (317122)

SYMPTOMS

CAUSE

RESOLUTION

WORKAROUND

STATUS

MORE INFORMATION