I have a router with DD-WRT interface. I have installed remote and routing interface on Windows server 2003 with static route. I don't see any error on Windows server, however, when I try to create VPN connection on client it fails to connect with error 880.
I think this is something do with passthrough setup on DD-WRT as Windows does not have any error. I am skeptic about opening direct PPTP from DD-WRT as it won't be secure for an organization. Further, I do not want to wipe existing configuration on router as it is also offers DHCP services instead of Windows server.