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I'm very puzzled about this as well. Surely a truly transparent filter bridge has no addresses as such and simply passes raw packets back and forward. So, like yourself, I'd like to use another physical interface as a client to my internal subnet getting its address via DHCP like everything else. Then I have a way to get to the OPNsense GUI and configure the filtering live.
BUT, I've only ever been able to see the WebGUI on the LAN interface, and activating bridge kills that ability. I also notice an unremovable anti-lockout rule which seems to port-forward 80 and 443 to LAN which is perhaps why the WebGUI disappears forever resulting in a console reset being required.
Any expert help gratefully appreciated...
BUT, I've only ever been able to see the WebGUI on the LAN interface, and activating bridge kills that ability. I also notice an unremovable anti-lockout rule which seems to port-forward 80 and 443 to LAN which is perhaps why the WebGUI disappears forever resulting in a console reset being required.
Any expert help gratefully appreciated...
