PIX has a VPN function and you should use it. However, for some reasons, you
want to use w2k RRAS, here is the tip. quoted form
http://www.ChicagoTech.net
How to use PPTP through a Cisco PIX
In order to use PPTP through a PIX, you must have a one-to-one mapping from
the external IP to an internal IP for type 47 GRE packets and port 1723.
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For more and other information, go to
http://www.ChicagoTech.net
Don't send e-mail or reply to me except you need consulting services.
Posting on MS newsgroup will benefit all readers and you may get more help.
Robert Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN, Anti-Virus, Tips & Troubleshooting on
http://www.ChicagoTech.net
This posting is provided "AS IS" with no warranties.