We have a PPTP VPN on a MSFT 2003 server, which was working fine with a Linksys BEFSR41 in place. Replaced with a RVS4000, enabled PPTP passthrough, and forwarded port TCP 1723 traffic to server, and now when we attempt the above mentioned VPN, we get error 806, which is related to not being able to pass the GRE packets. Has anyone else seen/corrected this issue yet? Have the newest version of firmware loaded in the router. Any assistance would be greatly appreciated. Thanks!