Hotfix is available for Microsoft Application Request Routing v3.0

Applies to: Internet Information Services 8.0Internet Information Services 8.5


Issue 1

When you use Microsoft Application Request Routing (ARR) v3.0 on Windows 2012 or a later version, any WebSocket connection will be disconnected by ARR.

Issue 2

Assume that you have an AAR web farm that is configured to perform health check monitoring, and the web farm is also configured not to preserve the host header. In this situation, an access violation occurs.

This issue occurs because of errors in the ARR v3.0 module.


Download information

The following files are available for download from the Microsoft Download Center:
Download Download the x86 package now.

Download Download the x64 package now.

For more information about how to download Microsoft support files, see 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 prevent any unauthorized changes to the file.

Restart information

You have to restart the computer after you apply this hotfix if any affected files were being used when you installed this hotfix. To avoid restarting the computer, stop the World Wide Web Publishing Service (W3SVC) and exit Internet Information Services (IIS) Manager before you install this hotfix. Then, restart the service after the update is applied.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
For all supported x64-based versions of Application Request Router v3.0
File nameFile versionFile sizeDateTimePlatform

For all supported x86-based versions of Application Request Router v3.0

File nameFile versionFile sizeDateTimePlatform


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

More Information

For more information about software update terminology, see Description of the standard terminology that is used to describe Microsoft software updates