At our organization we are trying to setup a VPN. The internet connection goes through a Cisco router through the SonicWall through another router. We wanted to know if there were options we had to set on the Cisco routers to allow the VPN traffic to get an IP address. We've tried putting an Ubuntu box as our PPTPD we've also tried OpenVPN nothing worked. I think its not working because we haven't told the routers about the traffic but do not know much about VPN. Any help or direction would be highly appreciated.