Knowledge Base

FIX: Internet Explorer times out when it opens an ASPX page and when it uses Big-IP, SQUID Proxy Server software, SSL, and HTTP/1.0

Article ID: 841998

Article Last Modified on 5/15/2006

APPLIES TO

Microsoft .NET Framework 1.1
Microsoft Visual Studio .NET 2003 Enterprise Architect
Microsoft Visual Studio .NET 2003 Enterprise Developer
Microsoft Visual Studio .NET 2003 Professional Edition
Microsoft ASP.NET 1.1

SYMPTOMS

Microsoft Internet Explorer appears to stop responding (hang) or time out when it calls the Response.Flush method.

Note This behavior only occurs when Internet Explorer opens an ASPX page over Big-IP by using Secure Socket Layers (SSL), a server that is running SQUID Proxy Server software, and HTTP/1.0 (at the client browser). The following code causes this behavior:

<%
  Response.Write("Hello");
  Response.Flush()
  Response.Write("World");
%>

CAUSE

This problem occurs because the server has agreed to keep-alives in the response header by using the Connection: Keep-Alive header. However, the server does not send a Content-Length header or a Transfer-Encoding header. Big-IP thinks the keep-alive in the response is not valid. This behavior prevents the Big-IP OneConnection engine from being able to parse the connection. This behavior leads to the failure.

Note By design, the Content-Length header is not sent when the Response.Flush method is called. When headers are sent, the Content-Length is not known.

RESOLUTION

Software update information

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 Microsoft .NET Framework 1.1 service pack that contains this hotfix.

To resolve this problem immediately, 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

No prerequisites are required.

Restart requirement

You do not have to restart your computer after you apply this software update.

Software update replacement information

This software update does not replace any other software updates.

File information

The English version of this software update 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
   ----------------------------------------------------------------------------------------------
   19-May-2004  03:22  1.1.4322.1045    258,048  Aspnet_isapi.dll
   19-May-2004  03:22  1.1.4322.1045     20,480  Aspnet_regiis.exe
   19-May-2004  03:22  1.1.4322.1045     32,768  Aspnet_state.exe
   19-May-2004  03:22  1.1.4322.1045     32,768  Aspnet_wp.exe
   05-Apr-2004  21:39                    33,718  Installpersistsqlstate.sql
   05-Apr-2004  21:39                    34,342  Installsqlstate.sql
   05-Apr-2004  21:39                    35,243  Installsqlstatetemplate.sql
   19-May-2004  03:12  1.1.4322.1045     94,208  Perfcounter.dll
   19-May-2004  03:17                     8,685  Smartnav.js
   19-May-2004  23:39  1.1.4322.1045  1,224,704  System.dll
   19-May-2004  23:39  1.1.4322.1045    241,664  System.messaging.dll
   19-May-2004  23:40  1.1.4322.1045    323,584  System.runtime.remoting.dll
   19-May-2004  23:39  1.1.4322.1045    131,072  System.runtime.serialization.formatters.soap.dll
   19-May-2004  23:40  1.1.4322.1045  1,257,472  System.web.dll
   19-May-2004  23:40  1.1.4322.1045    819,200  System.web.mobile.dll
   19-May-2004  23:39  1.1.4322.1045    569,344  System.web.services.dll
   19-May-2004  23:40  1.1.4322.1045  1,339,392  System.xml.dll
   03-Oct-2003  20:20                     2,119  Uninstallsqlstatetemplate.sql
   19-May-2004  03:17                    14,482  Webuivalidation.js

WORKAROUND

To work around this problem, make any one of the following changes to the system that is described in the "Symptoms" section:

Do not use SSL.
Do not go through a server that is running SQUID Proxy Server software.
Do not call the Response.Flush method in the code.
In Internet Explorer, follow these steps:
1. On the Tools menu, click Internet Options.
2. On the Advanced tab, click to select the Use HTTP 1.1 through proxy connections check box.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

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

Keywords: kbbug kbfix kbcaching kbqfe kbnetframe110presp1fix kbhotfixserver KB841998

Microsoft KB Archive/841998

Contents