Cisco RVS4000 - Gigabit Security Router

Configuring IPSec with a Windows 2000 or XP Computer
How to Establish a Secure IPSec Tunnel
Cisco RVS4000 Security Router with VPN Administrator Guide 154
C
Authentication Methods Tab
e. Change the authentication method to Use this string to protect the key
exchange (preshared key), and enter the preshared key string, such as
XYZ12345. Click OK.
Preshared Key