Browse Prior Art Database

Point-to-Point Tunneling Protocol (PPTP) (RFC2637)

IP.com Disclosure Number: IPCOM000003225D
Original Publication Date: 1999-Jul-01
Included in the Prior Art Database: 2019-Feb-11
Document File: 57 page(s) / 69K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

K. Hamzeh: AUTHOR [+5]

Related Documents

10.17487/RFC2637: DOI

Abstract

This document specifies a protocol which allows the Point to Point Protocol (PPP) to be tunneled through an IP network. This memo provides information for the Internet community.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 4% of the total text.

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-

Hamzeh, et al. Informational [Page 1]

RFC 2637 Point-to-Point Tunneling Protocol (PPTP) July 1999

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", "SHOULD", and "SHOULD NOT" are to be interpreted as described in [12].

The words "silently discard", when used in reference to the behavior of an implementation upon receipt of an incoming packet, are to be interpreted as follows: the implementation discards the datagram without further processing, and without indicating an error to the sender. The implementation SHOULD provide the capability of logging the error, including the contents of the discarded datagram, and SHOULD record the event in a statistics counter.

Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. Protocol Goals and Assumptions . . . . . . . . . . . . . . 4 1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 5 1.3. Protocol Overview . . . . . . . . . . . . . . . . . . . . 6 1.3.1. Control Connection Overview . . . . . . . . . . . . . . 7 1.3.2. Tunnel Protocol Overview . . . . . . . . . . . . . . . . 7 1.4. Message Format and Protocol Extensibility . . . . . ....

Processing...
Loading...