I was wondering if the FortiGate 100D requires the GRE protocol for PPTP VPN connections.
I have a client with a Netgear WPN824 router and his PPTP connection will connect but drop within 30 seconds. I don't believe this router supports GRE so I was wondering if there is a way to not force GRE on the FortiGate so this client is able to maintain his connection. Or would the only option be to change out his router to something that does support GRE?
Any information is appreciated.