I am trying to establish an L2TP/IPSec connection to my company vpn server. The server is NATed, so the clients need to be have NAT-t capability. We achieved this in XP SP" with the "AssumeUDPEncapsulationContextOnSendRule" Does anybody know how to enable this in Vista RC1? I have tried the VPN connection inside the LAN, this works perfectly so i know the certificates on the laptop are good. Any pointer would be of great help. Thanks Paul

I am having the same problem! I really wonder why that does not work out of the box! Security?

The registry key has changed in Vista. See: http://www.jacco2.dds.nl/networking/vista-openswan.html#NAT-T