VPN Error 781

[Aaron Hoffman]

I have been trying to establish a VPN connection between 2
computers running both Windows XP. When I attempt to do
so, It says Connecting..., Then Verifying User name and
password, then finally I recieve the error 781. The error
says, "Encryption attempt failed because no valid
certificate was found." I'm pretty much at a loss right
now and have no idea what to do. Any help would be greatly
appreciated. Thank you

 

[Robert L [MS-MVP]]

quoted form http://www.ChicagoTech.net
Error 781 - Encryption Failed

Symptom: When connecting to a VPN server, you may receive this Error 781:
The encryption attempt failed because no valid certificate was found.

Resolution: If your VPN client is trying to use L2TP/IPSec for the VPN
connection, you may receive above message. What you need to do is switching
to a PPTP VPN connection, which doesn't need a certificate. To do this,
open the properties of the VPN connection, choose the Networking tab, and
change the "Type of VPN" to PPTP VPN (default is Automatic). Also make sure
you have good connection. Sometimes, poor connection can cause this issue
too.


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