I too would like to understand this placement of the Fortigate
transparent mode device between the router (gateway to the Internet) and
the model device. It's an important question and I don't see it
addressed in the Fortigate documentation, though i...
It would be good if someone has some proper insight into this (I have
the same issue with my FortiWifi device). I too notice my Wifi LANS on
the FortiWifi can't connect to the WAN1 properly in transparent mode.
The physical LAN ports LAN1, LAN2, etc ...