I have a failover wan group with my isp modem and a cellular modem. My cellular modem is plugged into OPT1. The cellular modem has an IP address of 192.168.5.1. I would like to be able to access its configuration page even when it is not in use. I tried to do this with an outbound Nat rule on the OPT1 interface. Is this even possible since the default state is to use the normal wan interface?