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Cisco Secure Router 520 Series Software Configuration Guide
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Configuring a VPN Using Easy VPN and an IPsec TunnelThe Cisco Secure Router 520 Series routers support the creation of Virtual Private Networks (VPNs).
Cisco routers and other broadband devices provide high-performance connections to the Internet, but
many applications also require the security of VPN connections which perform a high level of
authentication and which 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 6-1 shows a typical deployment scenario.
Figure 6-1 Remote Access VPN Using IPsec Tunnel
1Remote, networked users
2VPN client—Cisco Secure Router 520 Series router
3Router—Providing the corporate office network access
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