Overview

03/04/1999


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Table of Contents

PPT Slide

Overview

“Internet” vs. "Intranet"

"Extranet"

Virtual Private Networks

Virtual Private Networks

VPN Applications

VPN Applications (cont.)

What Are We Really Worried About?

Tunneling vs. Encapsulation

Tunneling Scenario

Some Advantages of Tunneling

VPN Protocols

PPTP

RAS

Sidebar: MS-PPTP Security

CHAP

L2F

L2TP

GRE

IPsec

IPsec (cont.)

IP Authentication Header

IP ESP

IP ESP Modes

VPN Protocols Compared

VPN Protocols Compared (cont.)

A VPN Can Also Be...

Sample VPN Service

Some References

Summary

Questions? Comments? Queries?

Acronyms and Abbreviations

Acronyms and Abbreviations (cont.)

Author: Gary Kessler

Email: kumquat@sover.net

Home Page: http://www.garykessler.net/library