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CHAPTER
13-1
Cisco 819 Integrated Services Routers Software Configuration Guide
OL-23590-02
13
Configuring a VPN Using Easy VPN and an IPSec
Tunnel
This chapter provides an overview of the creation of Virtual Private Networks (VPNs) that can be
configured on the Cisco 819 Integrated Services Routers (ISRs).
Cisco routers and other broadband devices provide high-performance connections to the Internet, but
many applications also require the security of VPN connections that perform a high level of
authentication and that encrypt the data between two particular endpoints.
Two types of VPNs are supported—site-to-site and remote access. Site-to-site VPNs are used to connect
branch offices to corporate offices, for example. Remote access VPNs are used by remote clients to log
in to a corporate network.
The example in this chapter illustrates the configuration of a remote access VPN that uses the Cisco Easy
VPN and an IPSec tunnel to configure and secure the connection between the remote client and the
corporate network.
Figure 13-1 shows a typical deployment scenario.