Consider the following scenario:

  • You install a Third-party legacy Transport Driver Interface (TDI) filter driver on a client computer that is running Windows Vista or Windows Server 2008.
    Note: TDI filter drivers are used by some antivirus or firewall applications to monitor network traffics, such as User Datagram Protocol (UDP) packets.
  • You create a virtual private network (VPN) connection that uses Smart Card authentication to connect to a server that is running Routing and Remote Access service.
  • Large UDP packets, which are more than 1460 bytes, are sent over the VPN connection.

In this scenario, when you use the VPN connection to connect to the server, the client computer stops responding. Additionally, the VPN connection is lost.

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