Error 789 - L2TP / IPSec

[netsec1]

Hello,

I am configuring L2TP/IPsec client (Vista and XP SP3) connecting to Check Point Gateway.

I was able to succussfully do this using VMWARE - however in real enviroment - it is not working.

The only difference that i can think of is NAT - since in VMware client and gateway were on same network.

Debug on the gateway indicate:
Gateway <-- Client (Phase1 Packet1)
Gateway --> Client (Phase1 Packet2)


After which there is no further traffic recieved by the gateway...

I have tried: http://support.microsoft.com/default.aspx?kbid=885407 - setting it to 1 and 2...still did not work.

Iwould appreciate if i can get some suggestions as this is becoming critical.

PS: Using certificate

[Carley]

To resolve this problem, you are able to make use of a preshared key on both ends of the VPN connection. The role of implementations supports L2TP/IPSec gateway to gateway VPN with a preshared key used for Internet Key Exchange (IKE) authentication. I hope this will help you to clear your some doubt. If you are not still confused then search it on Google I am sure that you will get appropriate solution on different websites. Thank you.