@cmb:
You can use as many IP's as you want on your OPT1 hosts, I've had deployments exactly as you describe and they work fine. You do not want it as a VIP since that IP is directly assigned on a system. That will likely break it, take that out.
What do you mean by "totally ignored"? What are you trying to do that doesn't work?
The VIP was only temporary in an attempt to make it work. Forget I ever mentioned it.
Quite simply, I have no access whatsoever from the WAN to those IP addresses on the (Filtered Bridge) OPT1 interface that are not the primary IP address on the host's Ethernet interface. Rules to the primary IP work perfectly; no rules to additional IPs (pass or deny, port or any) have any effect whatsoever, nor is there any corresponding entry in the log. It's as if the IP addresses were totally invisible to pfS.