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ITsVISTA KB-Link: KB977656

You cannot start a VPN connection that uses CHAP or PAP authentication to a computer that is running Windows Vista or Windows Server 2008

Consider the following scenario:

  • You have a computer that is running Windows Vista or Windows Server 2008.
  • You create a new incoming connection by using static IP addresses from the static IP address pool.
  • You use only one of the following authentication protocols as the authentication for the incoming connection:
    • Challenge Handshake Authentication Protocol (CHAP)
    • Password Authentication Protocol (PAP)

In this scenario, you cannot start a virtual private network (VPN) connection to this computer from a client computer that is running Windows XP, Windows Server 2003, or Windows Vista.

There is a download that resolves this issue. See Hotfixes for details.
32-bit Download: Contact Microsoft
64-Bit Download: Contact Microsoft

For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB977656.

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