Setting up Windows Server 2012 Datacenter as a VPN (with everything as default settings), I receive no errors upon installation, then I restart. Upon trying to connect to the VPN, here is what happens:
Using internal IP from a Windows 8 computer
If I set Type of VPN to "Automatic" and try to connect, I get:
Error 919: The connection could not be established because the
authentication protocol used by the RAS/VPN server to
verify your username and password could not be matched with
settings in your connection profile.
If I set Type of VPN to "L2TP/IPSec" and try to connect, I get:
Error 810: A network connection between your computer and the VPN
server was started, but the VPN connection was not completed. This is
typically caused by the use of an incorrect or expired certificate for
authentication between the client and the server. Please contact your
Administrator to ensure that the certificate being used for
authentication is valid.
Using external IP from a Windows 8 computer
If I set Type of VPN to "Automatic" and try to connect, I get:
Error 800: The remote connection was not made because the attempted
VPN tunnels failed. The VPN server might be unreachable. If this
connection is attempting to use an L2TP/IPSec tunnel, the security
parameters required for IPSec negotiation might not be configured
properly.
If I set Type of VPN to "L2TP/IPSec" and try to connect, I get:
Error 789: The L2TP connection attempt failed because the security
layer encountered a processing error during initial negotiations with
the remote computer.
Are these all supposed to related? If they are, what needs to be done to fix the problem?
Best Answer
When that happened to me, I simply installed a SSL certificate for the SSL connection.
It seemed to have fixed it.