You may be unable to use an AT&T Global Network VPN client and IPsec at the same time in Windows XP or in Windows 2000

You may be unable to use the following components at the same time in Microsoft Windows XP or in Microsoft Windows 2000:

• A version of AT&T Global Network virtual private network (VPN) client that is earlier than version 6.7
• The Internet Protocol security (IPsec) implementation that is built into both Windows XP and Windows 2000

In this situation, you cannot use a VPN tunnel to access resources on an enterprise network on which Domain and Server Isolation policies are deployed.

To resolve this issue, download AT&T Global Network Client version 6.7 or a later version. These versions are compatible with Windows IPsec and are available for download to computers that are running Windows XP or Windows 2000.

To obtain AT&T Global Network Client versions 6.7 or a later version, visit one of the following AT&T FTP sites:

• AT&T Global Network Client version 6.7:
  ftp://ftp.attglobal.net/pub/client/win32/6.7/netsetuppro.msi (ftp://ftp.attglobal.net/pub/client/win32/6.7/netsetuppro.msi)
• AT&T Global Network Client version 6.7.1:
  ftp://ftp.attglobal.net/pub/client/win32/6.7.1/netsetuppro.msi (ftp://ftp.attglobal.net/pub/client/win32/6.7.1/netsetuppro.msi)
• AT&T Global Network Client version 6.7.2:
  ftp://ftp.attglobal.net/pub/client/win32/6.7.2/v672.msi (ftp://ftp.attglobal.net/pub/client/win32/6.7.2/v672.msi)
• AT&T Global Network Client versions 6.7.3:
  ftp://ftp.attglobal.net/pub/client/win32/6.7.3/v673.msi (ftp://ftp.attglobal.net/pub/client/win32/6.7.3/v673.msi)

For more information about how to configure AT&T Global Network Client, visit the following AT&T Web site: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

For more information about the coexistence issues that frequently occur between third-party VPN client products and the IPsec implementation that is built into Windows, visit the following Microsoft Web site: The information and the solution in this document represents the current view of Microsoft Corporation on these issues as of the date of publication. This solution is available through Microsoft or through a third-party provider. Microsoft does not specifically recommend any third-party provider or third-party solution that this article might describe. There might also be other third-party providers or third-party solutions that this article does not describe. Because Microsoft must respond to changing market conditions, this information should not be interpreted to be a commitment by Microsoft. Microsoft cannot guarantee or endorse the accuracy of any information or of any solution that is presented by Microsoft or by any mentioned third-party provider.

Microsoft makes no warranties and excludes all representations, warranties, and conditions whether express, implied, or statutory. These include but are not limited to representations, warranties, or conditions of title, non-infringement, satisfactory condition, merchantability, and fitness for a particular purpose, with regard to any service, solution, product, or any other materials or information. In no event will Microsoft be liable for any third-party solution that this article mentions. The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.