I have successfully configured my Synology Diskstation (Model DS212j running DSM 4.3-3776) as a VPN Server. I settled on the L2TP protocol so that I can access resources on my home network.
Everything works flawlessly when connecting using Windows 8 x64, but on my Windows 7 x64 machine I receive error 766.
See here for more information on this error.
I have tried connecting behind the same firewall from a remote location and I get the same results: Windows 8 connects just fine, Windows 7 does not.
Is there a registry key missing from Windows 7? Or is there a way to generate a client certificate that I am unaware of (that Windows 8 seemed to do automagically)?
I tried looking for any significant difference in the mmc Cert Store snap-in, but nothing really stood out.
Additionally, trying to connect with a PSK (although it looks to be properly configured on the Diskstation) yields a different error for both OSes. Still I'd be happier with the certificate method.
Any help would be greatly appreciated.