Re: FortiExtender not working in IP Passthrough mode
I got this working. I'm not 100% sure it was the proper way to fix it, but it did start working the way I expected it to.
I don't recall what screen in the GUI I found it on, but there was a spot for a Virtual Wire pair for the LTE interface. I mapped this to port4 and it now consistently passes the IP through to the Fortigate.