I have a MX 84 in Passthrough mode. I'm using a FortiGate 60E to do all the routing for the LAN. So it goes Internet -> FortiGate -> MX 84 -> LAN. I have the MX with static IP on the same subnet as the LAN and going from the WAN Port of the MX to the FortiGate and then I'm plugged into a LAN port of the MX. The internet works, the Meraki dashboard says it has a VPN connection but I can't make any connections to the branch locations. There is nothing complicated at the branch locations, they are connected directly to a MX in routed mode. Is there anything special I need to do with the FortiGate to allow the VPN traffic?