Corporate Headquarters

Figure 2-1
Business Scenarios
The site-to-site VPN business scenario explained in 
Chapter 3, “Site-to-Site and Extranet VPN Business 
Scenarios”
links the corporate headquarters to a remote office using connections across the Internet. 
Users in the remote office are able to access resources as if they were part of the private corporate 
intranet. 
The extranet VPN business scenario explained in 
Chapter 3, “Site-to-Site and Extranet VPN Business 
Scenarios”
builds on the VPN scenario by linking the same corporate headquarters to a business partner 
using connections across the Internet; however, the business partner is given limited access to the 
headquarters network—the business partner can access only the headquarters public server.
The remote access VPN business scenario, explained in 
Chapter 4, “Remote Access VPN Business 
Scenarios”
provides a remote user access to the corporate headquarters network through a secure IPSec, 
PPTP, or L2TP tunnel that is initiated by the remote user running VPN client software on a PC. In this 
scenario, the user can access the corporate network remotely. 
Note
This guide does not explain how to configure your router for use with the Cisco Secure 
VPN Client
. 
For detailed information on client-initiated VPNs using 
Cisco Secure VPN Client software, refer to the 
Cisco Secure VPN Client Solutions Guide
 
publication
. If you are a registered Cisco user, you can access the
 
Access VPNs and IP 
Security Protocol Tunneling Technology
publication.
Assumptions
This guide assumes the following:
•
You are configuring a service provider transparent VPN, whereby the tunnel endpoints are outside 
of the service provider network (on the headquarters and remote site routers).
Remote
office
Remote user
Business