VPN with Point-to-Point Tunneling Protocol (PPTP)
Starting with Version 5.1 of the PIX IOS, Cisco provides support for Microsoft PPTP VPN clients as an alternative to IPSec. Although PPTP is a less secure technology than IPSec, PPTP is easier to configure and maintain. PPTP also enjoys a great deal of support, especially from Microsoft clients. The PPTP is an OSI Layer 2 tunneling protocol that allows a remote client to communicate securely through the Internet. PPTP is described by RFC 2637. The PIX Firewall only supports inbound PPTP, and only a single interface can have PPTP enabled at any given time. PPTP through the PIX has been tested with Windows 95 using DUN1.3, Windows 98, Windows NT 4.0 with SP6, and Windows 2000.
The PIX Firewall supports ...
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