FTP client does not establish a passive-mode FTP connection to an IPv4 FTP server in Windows 7 or in Windows Server 2008 R2

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Article ID: 2754804 - View products that this article applies to.
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Symptoms

Consider the following scenario:
  • You run a Java-based or native C-based FTP client on a computer that is running Windows 7 or Windows Server 2008 R2.
  • You enable a firewall on the computer.
  • You run the following command to enable the firewall application filter for the FTP client:
    netsh advfirewall set global StatefulFtp enable
    Note The filter dynamically opens ports for data connections.
  • The FTP client tries to establish a passive-mode FTP connection to an IPv4 FTP server by using a dual-mode IPV6 socket. To do this, the FTP client sends PASV commands to the FTP server.
In this scenario, the firewall drops the response to the PASV commands from the FTP server.

Cause

This issue occurs because the TCP Control Block (TCB) and Windows Filtering Platform (WFP) contexts for dual-mode sockets are not synchronized. In this situation, the FTP analyzer on the FTP client treats the endpoint as an IPv4 endpoint. However, WFP treats the endpoint as an IPv6 endpoint.

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=support
Note 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 one of the following operating systems:
  • Windows 7
  • Windows 7 Service Pack 1 (SP1)
  • Windows Server 2008 R2
  • Windows Server 2008 R2 Service Pack 1 (SP1)
For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view 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.

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.
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:
    Collapse this tableExpand this table
    VersionProductMilestoneService branch
    6.1.760 0.17xxxWindows 7 and Windows Server 2008 R2RTMGDR
    6.1.760 0.21xxxWindows 7 and Windows Server 2008 R2RTMLDR
    6.1.760 1.17xxxWindows 7 and Windows Server 2008 R2SP1GDR
    6.1.760 1.22xxxWindows 7 and Windows Server 2008 R2SP1LDR
  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
  • 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
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Netio.sys6.1.7601.17939240,49622-Aug-201217:16x86
Netio.sys6.1.7601.22114240,49619-Sep-201204:22x86
Fwpkclnt.sys6.1.7600.16385187,47214-Jul-200901:20x86
Tcpip.sys6.1.7600.171221,287,53606-Sep-201216:48x86
Fwpkclnt.sys6.1.7600.21320187,24806-Sep-201219:18x86
Tcpip.sys6.1.7600.213201,303,92006-Sep-201219:18x86
Fwpkclnt.sys6.1.7601.17950187,76006-Sep-201216:43x86
Tcpip.sys6.1.7601.179501,293,16806-Sep-201216:43x86
Fwpkclnt.sys6.1.7601.22108187,76006-Sep-201216:38x86
Tcpip.sys6.1.7601.221081,308,01606-Sep-201216:38x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Netio.sys6.1.7601.17939376,68822-Aug-201218:12x64
Netio.sys6.1.7601.22114376,68819-Sep-201206:01x64
Fwpkclnt.sys6.1.7600.16385288,33614-Jul-200901:47x64
Tcpip.sys6.1.7600.171221,894,25606-Sep-201217:38x64
Fwpkclnt.sys6.1.7600.21320288,11206-Sep-201220:08x64
Tcpip.sys6.1.7600.213201,878,38406-Sep-201220:08x64
Fwpkclnt.sys6.1.7601.17950288,62406-Sep-201217:50x64
Tcpip.sys6.1.7601.179501,914,73606-Sep-201217:50x64
Fwpkclnt.sys6.1.7601.22108288,62406-Sep-201218:12x64
Tcpip.sys6.1.7601.221081,902,96006-Sep-201218:12x64
For all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Netio.sys6.1.7601.17939711,02422-Aug-201216:51IA-64
Netio.sys6.1.7601.22114711,04819-Sep-201204:26IA-64
Fwpkclnt.sys6.1.7600.16385482,89614-Jul-200901:58IA-64
Tcpip.sys6.1.7600.171223,787,12006-Sep-201216:38IA-64
Fwpkclnt.sys6.1.7600.21320482,67206-Sep-201219:21IA-64
Tcpip.sys6.1.7600.213203,806,57606-Sep-201219:21IA-64
Fwpkclnt.sys6.1.7601.17950483,18406-Sep-201216:34IA-64
Tcpip.sys6.1.7601.179503,794,28806-Sep-201216:34IA-64
Fwpkclnt.sys6.1.7601.22108483,18407-Sep-201212:26IA-64
Tcpip.sys6.1.7601.221083,819,37607-Sep-201212:26IA-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 view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information

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

Additional files for all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File nameX86_35e37cce6cdffde2950eb3c3bbe1c5fe_31bf3856ad364e35_6.1.7600.21320_none_171cd6cf3a75d97e.manifest
File versionNot applicable
File size702
Date (UTC)20-Sep-2012
Time (UTC)03:45
PlatformNot applicable
File nameX86_3f6cb5f2744423e0112e02722a62fb6c_31bf3856ad364e35_6.1.7601.17939_none_2cb20ab28c3bd3a5.manifest
File versionNot applicable
File size1,054
Date (UTC)20-Sep-2012
Time (UTC)03:45
PlatformNot applicable
File nameX86_92f8e0d03aee38324cf722c2892edd13_31bf3856ad364e35_6.1.7601.22114_none_5c3192143096782d.manifest
File versionNot applicable
File size1,054
Date (UTC)20-Sep-2012
Time (UTC)03:45
PlatformNot applicable
File nameX86_f81cb42132cc76a0fb04bb1202c7ec75_31bf3856ad364e35_6.1.7600.17122_none_238fbc63bf4b0f8f.manifest
File versionNot applicable
File size702
Date (UTC)20-Sep-2012
Time (UTC)03:45
PlatformNot applicable
File nameX86_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_58923ff3139b4b9b.manifest
File versionNot applicable
File size2,540
Date (UTC)22-Aug-2012
Time (UTC)17:35
PlatformNot applicable
File nameX86_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22114_none_592c53462cad6812.manifest
File versionNot applicable
File size2,540
Date (UTC)19-Sep-2012
Time (UTC)04:41
PlatformNot applicable
File nameX86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.17122_none_b3322c8bc78c020f.manifest
File versionNot applicable
File size3,780
Date (UTC)07-Sep-2012
Time (UTC)14:13
PlatformNot applicable
File nameX86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.21320_none_b3b9caa8e0ab6c52.manifest
File versionNot applicable
File size3,834
Date (UTC)06-Sep-2012
Time (UTC)19:40
PlatformNot applicable
File nameX86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.17950_none_b4f642fdc4cc5905.manifest
File versionNot applicable
File size3,834
Date (UTC)06-Sep-2012
Time (UTC)17:07
PlatformNot applicable
File nameX86_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.22108_none_b5bdc9d6ddba6b14.manifest
File versionNot applicable
File size3,834
Date (UTC)06-Sep-2012
Time (UTC)17:03
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameAmd64_037f628c0e1f4c440d43f11da4332cd0_31bf3856ad364e35_6.1.7601.22114_none_9fcb01386126479b.manifest
File versionNot applicable
File size712
Date (UTC)20-Sep-2012
Time (UTC)03:46
PlatformNot applicable
File nameAmd64_0b1f90e9b55606d5a5b347de8ceea7fb_31bf3856ad364e35_6.1.7601.17939_none_f08f6fcd63b591d2.manifest
File versionNot applicable
File size1,060
Date (UTC)20-Sep-2012
Time (UTC)03:46
PlatformNot applicable
File nameAmd64_89c885821389aae0cb196ed0ade7ed36_31bf3856ad364e35_6.1.7601.22114_none_e27cebcdc95ac63e.manifest
File versionNot applicable
File size1,060
Date (UTC)20-Sep-2012
Time (UTC)03:46
PlatformNot applicable
File nameAmd64_8d10ae44dee8d94480166df0d0c2827e_31bf3856ad364e35_6.1.7600.21320_none_005bc7ef20a438ff.manifest
File versionNot applicable
File size706
Date (UTC)20-Sep-2012
Time (UTC)03:46
PlatformNot applicable
File nameAmd64_99da977437dc51a7961515ce810ca68c_31bf3856ad364e35_6.1.7600.17122_none_254d86c7eaf67a98.manifest
File versionNot applicable
File size706
Date (UTC)20-Sep-2012
Time (UTC)03:46
PlatformNot applicable
File nameAmd64_cb4a5b5f325e3d52be4b75f5d02ad5a3_31bf3856ad364e35_6.1.7601.17939_none_af91c78f2b20a43a.manifest
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File size1,414
Date (UTC)20-Sep-2012
Time (UTC)03:46
PlatformNot applicable
File nameAmd64_d9738826156543c319f8169ec9090c7a_31bf3856ad364e35_6.1.7601.22114_none_76aa3745ef842388.manifest
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Date (UTC)20-Sep-2012
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File size712
Date (UTC)20-Sep-2012
Time (UTC)03:46
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File nameAmd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_b4b0db76cbf8bcd1.manifest
File versionNot applicable
File size2,542
Date (UTC)22-Aug-2012
Time (UTC)18:33
PlatformNot applicable
File nameAmd64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22114_none_b54aeec9e50ad948.manifest
File versionNot applicable
File size2,542
Date (UTC)19-Sep-2012
Time (UTC)06:23
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File nameAmd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.17122_none_0f50c80f7fe97345.manifest
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Date (UTC)07-Sep-2012
Time (UTC)14:16
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File nameAmd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.21320_none_0fd8662c9908dd88.manifest
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Date (UTC)06-Sep-2012
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File nameAmd64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.17950_none_1114de817d29ca3b.manifest
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File nameWow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.17939_none_bf0585c900597ecc.manifest
File versionNot applicable
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Date (UTC)22-Aug-2012
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File nameWow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22114_none_bf9f991c196b9b43.manifest
File versionNot applicable
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Additional files for all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameIa64_5a38a41e35481abcbb9bc58734bc4611_31bf3856ad364e35_6.1.7601.22114_none_d184f2cb931edc03.manifest
File versionNot applicable
File size1,411
Date (UTC)20-Sep-2012
Time (UTC)03:45
PlatformNot applicable
File nameIa64_5aa5f2ba0395bd081d1929ba4763e58c_31bf3856ad364e35_6.1.7600.21320_none_8ce00eb809dfe8af.manifest
File versionNot applicable
File size704
Date (UTC)20-Sep-2012
Time (UTC)03:45
PlatformNot applicable
File nameIa64_8c2b71997d6e42fa1d8d6bcea8496a42_31bf3856ad364e35_6.1.7601.17939_none_6f702416c9ea209b.manifest
File versionNot applicable
File size1,411
Date (UTC)20-Sep-2012
Time (UTC)03:45
PlatformNot applicable
File nameIa64_8e97c6f3836bfb6a018b226195f1fe0a_31bf3856ad364e35_6.1.7600.17122_none_0aad947dfb09be26.manifest
File versionNot applicable
File size704
Date (UTC)20-Sep-2012
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File size2,541
Date (UTC)22-Aug-2012
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File nameIa64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22114_none_592df73c2cab710e.manifest
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Date (UTC)19-Sep-2012
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File nameIa64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.17122_none_b333d081c78a0b0b.manifest
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File nameIa64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7600.21320_none_b3bb6e9ee0a9754e.manifest
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File nameIa64_microsoft-windows-tcpip-binaries_31bf3856ad364e35_6.1.7601.17950_none_b4f7e6f3c4ca6201.manifest
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Date (UTC)22-Aug-2012
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File nameWow64_microsoft-windows-netio-infrastructure_31bf3856ad364e35_6.1.7601.22114_none_bf9f991c196b9b43.manifest
File versionNot applicable
File size1,166
Date (UTC)19-Sep-2012
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PlatformNot applicable

Properties

Article ID: 2754804 - Last Review: December 5, 2012 - Revision: 2.0
Applies to
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 for Itanium-Based Systems
  • Windows Server 2008 R2 Foundation
  • Windows Server 2008 R2 Standard
  • Windows Web Server 2008 R2
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Starter
  • Windows 7 Ultimate
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbsurveynew kbexpertiseinter KB2754804

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