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Point-to-Point Tunneling Protocol (RFC2637)

IP.com Disclosure Number: IPCOM000003225D
Original Publication Date: 1999-Jul-01
Included in the Prior Art Database: 2000-Sep-13

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

K. Hamzeh: AUTHOR [+6]

Abstract

This document specifies a protocol which allows the Point to Point Protocol (PPP) to be tunneled through an IP network. PPTP does not specify any changes to the PPP protocol but rather describes a new vehicle for carrying PPP. A client-server architecture is defined in order to decouple functions which exist in current Network Access Servers (NAS) and support Virtual Private Networks (VPNs). The PPTP Network Server (PNS) is envisioned to run on a general purpose operating system while the client, referred to as a PPTP Access Concentrator (PAC) operates on a dial access platform. PPTP specifies a call-control and management protocol which allows the server to control access for dial-in circuit switched calls originating from a PSTN or ISDN or to initiate outbound circuit-

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Network Working Group K. Hamzeh

Request for Comments: 2637 Ascend Communications

Category: Informational G. Pall

Microsoft Corporation

W. Verthein

3Com

J. Taarud

Copper Mountain Networks

W. Little

ECI Telematics

G. Zorn

Microsoft Corporation

July 1999

Point-to-Point Tunneling Protocol (PPTP)

Status of this Memo

This memo provides information for the Internet community. It does

not specify an Internet standard of any kind. Distribution of this

memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (1999). All Rights Reserved.

IESG Note

The PPTP protocol was developed by a vendor consortium. The

documentation of PPTP is provided as information to the Internet

community. The PPP WG is currently defining a Standards Track

protocol (L2TP) for tunneling PPP across packet-switched networks.

Abstract

This document specifies a protocol which allows the Point to Point

Protocol (PPP) to be tunneled through an IP network. PPTP does not

specify any changes to the PPP protocol but rather describes a new

vehicle for carrying PPP. A client-server architecture is defined in

order to decouple functions which exist in current Network Access

Servers (NAS) and support Virtual Private Networks (VPNs). The PPTP

Network Server (PNS) is envisioned to run on a general purpose

operating system while the client, referred to as a PPTP Access

Concentrator (PAC) operates on a dial access platform. PPTP

specifies a call-control and management protocol which allows the

server to control access for dial-in circuit switched calls

originating from a PSTN or ISDN or to initiate outbound circuit-

switched connections. PPTP uses an enhanced GRE (Generic Routing

Encapsulation) mechanism to provide a flow- and congestion-controlled

encapsulated datagram service for carrying PPP packets.

Specification of Requirements

In this document, the key words "MAY", "MUST, "MUST NOT", "optional",

"recommended"...