Point-to-Point Tunneling Protocol (PPTP) is a network protocol that enables the secure transfer of data from a remote client to a private enterprise server by creating a virtual private network (VPN) across TCP/IP-based data networks. PPTP supports on-demand, multi-protocol, virtual private networking over public networks such as the Internet.
The networking technology of PPTP is an extension of the remote access Point-to-Point protocol defined in the document by the Internet Engineering Task Force (IETF) titled "The Point-to-Point Protocol for the Transmission of Multi-Protocol Datagrams over Point-to-Point Links," referred to as RFC 1171. PPTP is a network protocol that encapsulates PPP packets into IP datagrams for transmission over the Internet or other public TCP/IP-based networks. PPTP can also be used in private LAN-to-LAN networking.
The PPTP extension of PPP is explained in the document titled "Point-to-Point Tunneling Protocol ," PPTP draft-ietf - ppext - pptp - 00.Text. A draft of this document was submitted to the IETF in June, 1996 by the companies of the PPTP Forum, which includes Microsoft Corporation, Ascend Communications, 3Com/Primary Access, ECI Telematics, and US Robotics.
Note: Internet draft documents should be considered as a "works in progress." See www.ietf.org for copies of Internet drafts and RFCs mentioned in this document. For more information about PPTP, visit our Web site at http:\\www.microsoft.com\ntserver. See the topic "Network Communications and Telephony" under "All About..."
This document is for network administrators, support personnel, and developers who need to understand how PPTP can be used to provide low-cost remote access solutions and includes the following topics:
PPTP and secure, virtual private networking (VPN)
architecture of PPTP
PPTP security features
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