Can I do this with pfsense?
I have 2 public IP adresses (DHCP) and I would like to use one as the pfsense wan interface, and the other as the public adress to my server (behind the pfsense box).
What I would like is to use a VLAN config in the pfsense and the switch to isolate the server but how do I config pfsense to let the server behind the pfsense get my ISPs DHCP?
DHCP relay may be what I want but then I need to disable DHCP on ALL interfaces, and then I don't have a internal DHCP on my lan…
Do you actually need the public IP on your server?
Commonly this would be done by using a virtual IP on your WAN to get the second address and then 1:1 NATing it to the server.