Symptoms

Assume that you use wildcard TCP ports on multiple IP addresses on the same network adapter in Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1. In this situation, you cannot reuse the wildcard TCP ports even though the SO_PORT_SCALABILITY socket option that is used to maximize wildcard port allocation is set on all sockets.

For example, when you enable the port scalability feature for remote procedure call (RPC) proxies on a computer, the RPC ports cannot be reused on multiple IP addresses on the same network adapter.

Note The SO_PORT_SCALABILITY socket option enables local port scalability for a socket. That is, port allocation can be maximized by allocating wildcard ports multiple times for different local address port pairs on a local computer.  

Cause

This issue occurs because the scanning operation that looks for addresses to use concludes without actually performing a search.

Resolution

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website:

http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must be running Windows 7 SP1 or Windows Server 2008 R2 SP1.

For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to go to the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

To apply this hotfix, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

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.

Windows 7 and Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.1.760
    1.22xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Netio.sys

6.1.7601.22277

240,472

11-Mar-2013

13:10

x86

Fwpkclnt.sys

6.1.7601.22277

187,736

11-Mar-2013

13:10

x86

Tcpip.sys

6.1.7601.22277

1,308,504

11-Mar-2013

13:10

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Netio.sys

6.1.7601.22277

376,664

11-Mar-2013

13:55

x64

Fwpkclnt.sys

6.1.7601.22277

288,104

11-Mar-2013

13:55

x64

Tcpip.sys

6.1.7601.22277

1,901,400

11-Mar-2013

13:55

x64

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Netio.sys

6.1.7601.22277

711,016

11-Mar-2013

13:00

IA-64

Fwpkclnt.sys

6.1.7601.22277

482,136

11-Mar-2013

12:59

IA-64

Tcpip.sys

6.1.7601.22277

3,821,912

11-Mar-2013

13:00

IA-64


Status

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, click the following article number to go to the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File name

X86_546639867bfc6bb65372cdcf905aaa50_31bf3856ad364e35_6.1.7601.22277_none_cf218a58c095b118.manifest

File version

Not applicable

File size

1,054

Date (UTC)

11-Mar-2013

Time (UTC)

19:25

Platform

Not applicable

File name

X86_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22277_none_58ee76822cdb58e4.manifest

File version

Not applicable

File size

2,540

Date (UTC)

11-Mar-2013

Time (UTC)

13:38

Platform

Not applicable

File name

X86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22277_none_b5711bfeddf4127b.manifest

File version

Not applicable

File size

3,834

Date (UTC)

11-Mar-2013

Time (UTC)

13:39

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_961ef1ee2bd38784a8de64a3408bf8f3_31bf3856ad364e35_6.1.7601.22277_none_903537b50cfe0c95.manifest

File version

Not applicable

File size

1,414

Date (UTC)

11-Mar-2013

Time (UTC)

19:25

Platform

Not applicable

File name

Amd64_a496795964f709e41091e5a2b18fe323_31bf3856ad364e35_6.1.7601.22277_none_61557a7197068ad1.manifest

File version

Not applicable

File size

1,060

Date (UTC)

11-Mar-2013

Time (UTC)

19:25

Platform

Not applicable

File name

Amd64_ea3cee86fad19d4f64c70be9efc81950_31bf3856ad364e35_6.1.7601.22277_none_5711fc7014cb73de.manifest

File version

Not applicable

File size

712

Date (UTC)

11-Mar-2013

Time (UTC)

19:25

Platform

Not applicable

File name

Amd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22277_none_b50d1205e538ca1a.manifest

File version

Not applicable

File size

2,542

Date (UTC)

11-Mar-2013

Time (UTC)

15:12

Platform

Not applicable

File name

Amd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22277_none_118fb782965183b1.manifest

File version

Not applicable

File size

3,838

Date (UTC)

11-Mar-2013

Time (UTC)

15:15

Platform

Not applicable

File name

Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22277_none_bf61bc5819998c15.manifest

File version

Not applicable

File size

1,166

Date (UTC)

11-Mar-2013

Time (UTC)

13:19

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File name

Ia64_b54891d0731a0cd5843397f78c6eacf5_31bf3856ad364e35_6.1.7601.22277_none_847bde222ca9a6fb.manifest

File version

Not applicable

File size

1,411

Date (UTC)

11-Mar-2013

Time (UTC)

19:25

Platform

Not applicable

File name

Ia64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22277_none_58f01a782cd961e0.manifest

File version

Not applicable

File size

2,541

Date (UTC)

11-Mar-2013

Time (UTC)

13:23

Platform

Not applicable

File name

Ia64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22277_none_b572bff4ddf21b77.manifest

File version

Not applicable

File size

3,836

Date (UTC)

11-Mar-2013

Time (UTC)

13:25

Platform

Not applicable

File name

Wow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22277_none_bf61bc5819998c15.manifest

File version

Not applicable

File size

1,166

Date (UTC)

11-Mar-2013

Time (UTC)

13:19

Platform

Not applicable


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