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How to establish a L2TP VPN Connection with Vista SP1

I'm trying to establish a VPN L2TP/IPsec with Vista business SP1 and I get the error message: Error 835: The L2TP connection attempt failed because the security layer could not authenticate the remote computer. This could be because one or more fields of the certificate presented by the remote server could not be validated as belonging to the target destination.

What I understand is that IPsec is trying to match the host name I typed in my VPN Connection properties under the General Tab with the server certificate. In VPN connection properties, under networking/IPsec Settings there is a new option in Vista that waren't in XP call "Use Certificate for authentification". If I uncheck "Verify the name and usage attributes of ther server's certificate" the VPN connection is working but I get a BSOD (blue screen of death) after a certain time. And I'm not sure that it is a good idea to uncheck this option has it may reduce the security.

Does anyone have an idea on what I can do?

By the way the same connection is working with my XP workstation with the exact same certificate.

Thanks!

VPNWindows VistaInternet Protocol Security

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Merete
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ASKER

Hi Merete,

I also found the web site for IPsec without L2TP. I will check that out today and let you kmow if it worked.
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NRI_ADMIN
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ASKER

Sorry it took me so long to respond back. I add to wait to for my client to test it.  I made ihim uncheck the "Verify the name and usage attributes of ther server's certificate" option on his laptop and it worked fine without any BSOD.

Thanks!
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Merete
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Thanks so much NRI_ADMIN, glad to know I was able to assist you.
Cheers
VPN
VPN

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.

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