A network configuration question from a relative newbie...
We have an existing LAN setup, with a hardware firewall (D-Link DIR-655) and a Microsoft Small Business Server (which does the DHCP).
We have been assigned multiple Public IPs by our ISP, but the D-Link can only have a single static IP AFAIK. I am looking to use our additional IPs by pointing them to a few different web servers internally.
My proposed network design, is to create a SmoothWall VM (VirtualBox). I would then put the VM in the DMZ. That way, SmoothWall can take the incoming requests to our other Public IPs, and forward the port 80 ones on to the correct (virtual) machines within our network.
Is this the correct way of setting up the network?
Note: I'm trying to avoid taking down the existing LAN as we run our main business Exchange server and other services via the first public IP address. I also don't have a spare hardware machine with 2 NICs for the SmoothWall install, although if there are significant advantages to that then we can consider getting one.