ipsec tunnel works but l2tp doesn't with same certificates
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ipsec tunnel works but l2tp doesn't with same certificates

 
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James
Guest
Posted: Tue Dec 21, 2004 10:37 pm    Post subject: ipsec tunnel works but l2tp doesn't with same certificates Reply with quote
I have set up a l2tp remote access vpn on my LAN. The VPN Server is running
Windows 2003 with a static address pool and other default settings and the
client has L2TP/IPSec VPN set, firewall off and default security. I have
installed certificates onto the local computer of each machine from the same
Enterprise CA and made sure they both have Root Certificates.

When I try to connect from the client the following error appears:

Error 789: The L2TP connection attempt failed because the security layer
encountered a processing error during initial negotiations with the remote
computer

However, if I assign an IPSec policy using the same certifcates to
authenticate and connect using the same L2TP client connection it works.
What can be stopping the L2TP vpn?

Any help greatly appreciated. Thankyou
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Robin Walker
Guest
Posted: Tue Dec 21, 2004 11:48 pm    Post subject: Re: ipsec tunnel works but l2tp doesn't with same certificat Reply with quote
James <James@discussions.microsoft.com> wrote:

Quote:
When I try to connect from the client the following error appears:

Error 789: The L2TP connection attempt failed because the security
layer encountered a processing error during initial negotiations with
the remote computer

However, if I assign an IPSec policy using the same certifcates to
authenticate and connect using the same L2TP client connection it
works. What can be stopping the L2TP vpn?

Is it anything to do with this?
http://support.microsoft.com/default.aspx?scid=kb;en-us;885407

--
Robin Walker
rdhw@cam.ac.uk
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James
Guest
Posted: Thu Dec 23, 2004 2:33 pm    Post subject: Re: ipsec tunnel works but l2tp doesn't with same certificat Reply with quote
In this situation I am trying to set up a vpn over an internal LAN so there
is no NAT needed between the two ends of VPN.

"Robin Walker" wrote:

Quote:
James <James@discussions.microsoft.com> wrote:

When I try to connect from the client the following error appears:

Error 789: The L2TP connection attempt failed because the security
layer encountered a processing error during initial negotiations with
the remote computer

However, if I assign an IPSec policy using the same certifcates to
authenticate and connect using the same L2TP client connection it
works. What can be stopping the L2TP vpn?

Is it anything to do with this?
http://support.microsoft.com/default.aspx?scid=kb;en-us;885407

--
Robin Walker
rdhw@cam.ac.uk


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