You cannot access websites on a corporate network by using a VPN on a Windows Vista-based computer

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Article ID: 2678957 - View products that this article applies to.
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SYMPTOMS

Assume that you connect to a corporate network by using a virtual private network (VPN) on a computer that is running Windows Vista, and you enable Split Tunneling on the connection. In this situation, you cannot access websites on the corporate network.

CAUSE

This issue occurs because the Dynamic Host Configuration Protocol (DHCP) Client service does not work correctly when it uses the Ndiswan adapter after you establish the VPN connection.

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 Windows Vista Service Pack 1 (SP1) or Windows Vista Service Pack 2 (SP2). For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack

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 Vista file information notes
Important Windows Vista hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" 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, SR_Level (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
    VersionProductSR_LevelService branch
    6.0.600 2 . 22xxxWindows VistaSP2LDR
  • 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 Vista" section. MUM files and MANIFEST files, and the associated security catalog (.cat) files, are extremely important 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 Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Dhcpcmonitor.dll6.0.6002.2280210,24022-Feb-201214:37x86
Dhcpcsvc.dll6.0.6002.22802204,28822-Feb-201214:37x86
Dhcpcsvc6.dll6.0.6002.22802130,56022-Feb-201214:37x86
For all supported x64-based versions of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Dhcpcmonitor.dll6.0.6002.2280212,28822-Feb-201216:00x64
Dhcpcsvc.dll6.0.6002.22802268,28822-Feb-201216:00x64
Dhcpcsvc6.dll6.0.6002.22802163,32822-Feb-201216:00x64
Dhcpcmonitor.dll6.0.6002.2280210,24022-Feb-201214:37x86
Dhcpcsvc.dll6.0.6002.22802204,28822-Feb-201214:37x86
Dhcpcsvc6.dll6.0.6002.22802130,56022-Feb-201214:37x86
For all supported IA-64-based versions of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Dhcpcmonitor.dll6.0.6002.2280224,06422-Feb-201214:34IA-64
Dhcpcsvc.dll6.0.6002.22802546,30422-Feb-201214:34IA-64
Dhcpcsvc6.dll6.0.6002.22802358,40022-Feb-201214:34IA-64
Dhcpcmonitor.dll6.0.6002.2280210,24022-Feb-201214:37x86
Dhcpcsvc.dll6.0.6002.22802204,28822-Feb-201214:37x86
Dhcpcsvc6.dll6.0.6002.22802130,56022-Feb-201214:37x86

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 Vista

Additional files for all supported x86-based versions of Windows Vista
Collapse this tableExpand this table
File nameX86_4c79a73fd821fa733c8ea0e99ba3519d_31bf3856ad364e35_6.0.6002.22802_none_475d3c0f8f98b713.manifest
File versionNot applicable
File size703
Date (UTC)22-Feb-2012
Time (UTC)17:22
PlatformNot applicable
File nameX86_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.0.6002.22802_none_d9cc4be344d1da9c.manifest
File versionNot applicable
File size41,264
Date (UTC)22-Feb-2012
Time (UTC)14:56
PlatformNot applicable
Additional files for all supported x64-based versions of Windows Vista
Collapse this tableExpand this table
File nameAmd64_dac50665eef79cc96d8584e0134b9970_31bf3856ad364e35_6.0.6002.22802_none_bada78d8f3a3b6bd.manifest
File versionNot applicable
File size1,054
Date (UTC)22-Feb-2012
Time (UTC)17:22
PlatformNot applicable
File nameAmd64_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.0.6002.22802_none_35eae766fd2f4bd2.manifest
File versionNot applicable
File size41,312
Date (UTC)22-Feb-2012
Time (UTC)16:21
PlatformNot applicable
File nameX86_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.0.6002.22802_none_d9cc4be344d1da9c.manifest
File versionNot applicable
File size41,264
Date (UTC)22-Feb-2012
Time (UTC)14:56
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Vista
Collapse this tableExpand this table
File nameIa64_d56e279ace940c5aab04bf7b893a3ce2_31bf3856ad364e35_6.0.6002.22802_none_3ccf55c3f2d56a38.manifest
File versionNot applicable
File size1,052
Date (UTC)22-Feb-2012
Time (UTC)17:22
PlatformNot applicable
File nameIa64_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.0.6002.22802_none_d9cdefd944cfe398.manifest
File versionNot applicable
File size41,287
Date (UTC)22-Feb-2012
Time (UTC)14:47
PlatformNot applicable
File nameX86_microsoft-windows-dhcp-client-dll_31bf3856ad364e35_6.0.6002.22802_none_d9cc4be344d1da9c.manifest
File versionNot applicable
File size41,264
Date (UTC)22-Feb-2012
Time (UTC)14:56
PlatformNot applicable

Properties

Article ID: 2678957 - Last Review: April 11, 2012 - Revision: 1.0
APPLIES TO
  • Windows Vista Business
  • Windows Vista Enterprise
  • Windows Vista Home Basic
  • Windows Vista Home Premium
  • Windows Vista Ultimate
  • Windows Vista Business 64-bit Edition
  • Windows Vista Enterprise 64-bit Edition
  • Windows Vista Home Basic 64-bit Edition
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Starter
Keywords: 
kbautohotfix kbqfe kbfix kbhotfixserver kbexpertiseadvanced kbsurveynew KB2678957

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