I am looking at switching ISPs. Currently I have an abundance of public IP addresses, but if I switch I will only get 5. I know which servers I need to assign a public IP address. I also need to assign one to my firewall for NAT. Is there a way to not have one assigned to my router? Obviously, my Cisco 2524 router is on the public side of my firewall. The firewall is an MS ISA 2006 server, with the public NIC card currently configured with the gateway as my 2524 router.