Linksys 2.4 GHz 802.11g Wireless-G ADSL Gateway with 2 Ports WAG54GP2 - Manual (Page 110)

102 Appendix C: Configuring IPSec between a Windows 2000 or XP Computer and the Gateway
How to Establish a Secure IPSec Tunnel
Wireless-G ADSL Gateway with 2 Phone Ports
13. Change the authentication method to Use this string to protect the key exchange (preshared key), and
enter the preshared key string, such as XYZ12345, as shown in the example. (This is a sample key string.
Yours should be a key that is unique but easy to remember.) Then click the OK button.
14. This new Preshared key will be displayed. Click the Apply button to continue, if it appears on your screen,
otherwise proceed to the next step.
15. Click the Tunnel Setting tab, click the radio button for The tunnel endpoint is specified by this IP Address,
and enter the Windows 2000/XP computer’s IP Address.
Figure C-22: Preshared Key
Figure C-23: New Preshared Key
Figure C-24: Tunnel Setting Tab