Resolve VPN connection issues on Windows Vista machines

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This script can help troubleshoot slow network connections.

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 Some of your users may face problems accessing network resources while using a VPN connection to the corporate network from a workstation running Microsoft Windows Vista.

One reason for this is because a Domain Name System (DNS) suffix cannot be obtained for the TCP/IPv4 address. This happens because Dynamic Host Configuration Protocol version 6 (DHCPv6) does not support connection-specific DNS suffixes. Therefore, DNS suffixes must be configured by using TCP/IPv4, either manually or automatically.

To work around this issue, manually configure the DNS suffix for the TCP/IPv4 address in the VPN connection. To do this:

  1. Click Start, right-click Network, then click Properties.


  2. Click Manage network connections.


  3. Right-click the VPN connection that you want to configure, then click Properties.


  4. If you are prompted to confirm that you want to continue, click Continue.


  5. In the "This connection uses the following items box" on the Networking tab, click Internet Protocol Version 4 (TCP/IPv4). Then click Properties.


  6. Click Advanced, then click the DNS tab.


  7. Specify the DNS suffix for the connection, then click OK three times.

This was first published in April 2007

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