On a computer that is running Microsoft Windows XP with
Service Pack 2 (SP2), programs that connect to IP addresses that are in the
loopback address range may not work as you expect. For example, you may receive
an error message that says that you cannot establish a
connection.
This problem occurs if the program connects to a loopback
address other than 127.0.0.1. Windows XP Service Pack 2 (SP2) prevents
connections to all IP addresses that are in the loopback address range except
for 127.0.0.1.
Update information
The
following file is available for download from the Microsoft Download
Center:
Collapse this imageExpand this image
Download
the Update for Windows XP Service Pack 2 (KB884020) package
now.
(http://www.microsoft.com/downloads/details.aspx?FamilyId=17D997D2-5034-4BBB-B74D-AD8430A1F7C8&displaylang=en)
Release Date:
September 2004
For additional information about how to download
Microsoft Support files, click the following article number to view the article
in the Microsoft Knowledge Base:
119591
(http://support.microsoft.com/kb/119591/
)
How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most
current virus-detection software that was available on the date that the file
was posted. The file is stored on security-enhanced servers that help to
prevent any unauthorized changes to the file.
Prerequisites
This update requires Windows XP Service Pack 2 (SP2).
Restart requirement
You have to restart your computer after you apply this update.
Update replacement information
This update does not replace any other updates.
File information
The English version of this hotfix has the file attributes (or later file attributes) 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
-----------------------------------------------------
13-Aug-2004 22:50 5.1.2600.2505 359,040 Tcpip.sys
Microsoft
has confirmed that this is a problem in the Microsoft products that are listed
in the "Applies to" section.
This fix is also included in the fix for Microsoft Knowledge Base article 893066.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
893066
(http://support.microsoft.com/kb/893066/
)
MS05-019: Vulnerabilities in TCP/IP could allow remote code execution and denial of service
For more information about how to troubleshoot a problem where
Remote Desktop Connection does not permit loopback connections to ports that it
is not listening on, click the following article number to view the article in the Microsoft Knowledge Base:
817293
(http://support.microsoft.com/kb/817293/
)
Remote Desktop Connection does not
permit loopback connections to ports that it is not listening on
For more information about troubleshooting TCP/IP connectivity
issues with Windows XP, click the following article number to view the article in the Microsoft Knowledge Base:
314067
(http://support.microsoft.com/kb/314067/
)
How to troubleshoot TCP/IP
connectivity with Windows XP
For more information about standard terminology that is used to
describe Microsoft software updates, click the following article number to view the article in the Microsoft Knowledge Base:
824684
(http://support.microsoft.com/kb/824684/
)
Description of the standard terminology that is used to describe
Microsoft software updates
Article ID: 884020 - Last Review: October 9, 2011 - Revision: 5.0
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