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Fixed VPN Error Code: 766

RRAS, VPN, TS/RDP, Routing and remote Access.

Fixed VPN Error Code: 766

Postby guest » Sun Aug 26, 2012 10:51 am

Error Code: 766

Error Description: 766: A certificate could not be found. Connections that use the L2TP protocol over IPSec require the installation of a machine certificate, also known as a computer certificate.

Possible Cause: This error usually comes when their is no valid machine certificate on your client machine.

Possible Solution: Make sure the correct machine certificate for L2TP validation is installed on your client machine - for further details refer to this blog.
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Re: Fixed VPN Error Code: 766

Postby blin » Mon Aug 27, 2012 8:16 am

We had a case. The XP is VPN host and Windows 7 is VPN client. When Windows 7 establishes PPTP, it works fine. However, if it uses L2TP, we get error 766. We find the certificate was install on windows Certificate Current user. The fix is installing certificate on Local Computer.
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