We have a BT 21CN fibre connection into our firewall - it's just one patch cable into the X1 WAN port.
The connection has 5 public IP addresses.
For testing purposes, I need my machine, which is behind the firewall, to use one of those public IP addresses, which is not assigned to X1, as a gateway to the Internet. This is because we've set up special access rules for our default Internet IP address to one of our web servers somewhere else. There are also a few other times where this might be useful.
As it is, our firewall only knows that the X1 has one public WAN IP address. How do I go about telling it there are several WAN IP addresses, and how on earth can I then configure a new gateway on it which I can specify manually on my workstation?
I do, of course, want to leave the 'default' WAN gateway well alone as we have a network full of users using it.