I don't see how the ISP has anything to do with it. After all, you are not
setting up VPN connection into one of their devices you are configuring for
one of yours. The below articles applies to Windows 2000 Server. They
should apply to Windows Server 2003 as well.
Enabling Multilink and BAP on a Computer Running Windows 2000 Server:
http://support.microsoft.com/kb/q244071/
How to Configure RAS Servers for ISP Environments
http://www.microsoft.com/serviceprov...figuration.asp
--
Todd J Heron, MCSE
Windows Server 2003/2000/NT
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