Re: Public IP addresses on the LAN Ports
and welcome to the forums.
Yes, you can use ANY address space on ANY port of a FGT - except for some models with a "mgmt" port. Reason for the latter is that the "mgmt" interface will not be included in routing.
The printed labels on a FGT are just suggestions for the most common use.
Ede " Kernel panic: Aiee, killing interrupt handler!"