By default, Windows 2000 automatically creates an
IPSec policy to be used with L2TP/IPSec connections that requires a
certificate for Internet Key Exchange (IKE) authentication. If you want to
use preshared keys instead you need to disable this policy and create a new
one.
240262 How to Configure a L2TP/IPSec Connection Using Pre-shared Key
http://support.microsoft.com/?id=240262
Note: Although Microsoft does not support or recommend the use of a preshare
key for IKE authentication on remote access L2TP/IPSec client connections
(should be used for testing only), Windows 2000 is compliant with IKE RFC
2409 and provides a way to implement it. L2TP/IPSec gateway-to-gateway VPN
implementations by using a preshared key for IKE authentication are
supported.
--
Thanks,
Marc Reynolds
Microsoft Technical Support
This posting is provided "AS IS" with no warranties, and confers no rights.