Update improves port exhaustion identification in Windows Server 2012 R2

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 StandardWindows Server 2012 R2 Essentials

This article describes an update that enables port exhaustion identification without a memory dump in Windows Server 2012 R2. Before you install this update, see the Prerequisites section.

About this update

Network reporting tools, such as Netstat and PowerShell-based Get-NetTcpConnection don't report Transport Control Protocol (TCP) or User Datagram Protocol (UDP) port usage correctly since Windows Vista because some new TCP/IP features are introduced. This update brings some changes to Netstat.exe and Get-NetTcpConnection so that they can correctly report the TCP or UDP port usage in Windows Server 2012 R2.

How to get this update

Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.

Method 1: Windows Update

This update is provided as a Recommended update on Windows Update. For more information on how to run Windows Update, see How to get an update through Windows Update.

Method 2: Microsoft Download Center

The update is available for download from the Microsoft Download Center:

Download Download the Windows Server 2012 R2 package now.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
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 prevent any unauthorized changes to the file.

Update detail information


To apply this update, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows Server 2012 R2.

Registry information

To apply this update, you don't have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this update.

Update replacement information

This update doesn't replace a previously released update.


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

More Information

After you install the update, you can use either Netstat.exe or Get-NetTCPConnection to output the list of ports being used on the computer. You will want to look at the bound connections because this indicates a process or an application that has opened up the port. If you have extensive ports bound and all tied to the same application or process, a memory leak might occur.

Following are the Examples of the commands:
  • NetStat -anoq
  • Get-NetTCPConnection | Group-Object -Property State, OwningProcess | Sort Count


Learn about the terminology that Microsoft uses to describe software updates.

File Information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). Be aware that dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time bias. The dates and times may also change when you perform certain operations on the files.