So when using google fiber, if you buy multiple public IPs they require you to use DHCP for the main /30 connection between your router and their service. Then they route the additional subet (/29) to the IP on your router (from the /30). When doing this years ago on an Adtran router, you could just add IPs fron that 2nd subnet as a secondary IP address on the WAN interface and that worked great (the default route to the carrier side of the /30 took care of getting it to the next hop).
With pfsense if you don't want to route the /29 to a different physical interface, just want to use it as another WAN IP (or for port fowarding a service to a particular LAN IP etc), how would you go about doing that on pfsense?
I've seen the virtual IP section under firewall - but it looked to me like it required those to be from within the subnet assigned to the WAN interface (in this case it is a /30 so there's really not any extra usable IPs).
For example, if my connection with the carrier hands my pfsense router a (fake) public IP of 10.10.10.2/30 (with the carrier side / gateway being 10.10.10.1) and the additional /29 block of public IPs (10.20.20.16/29) the carrier routes to the 10.10.10.2 IP (assigned to the pfsense router via DHCP). How would I set it up so I can port forward 10.20.20.17 ports 80 and 443 to my internal web server at (192.168.200.10 on the LAN)? I know those 10.x aren't actually public IPs, just trying to give an example so better explain what I'm trying to ask.