Newbie here - creating route to 2nd hardware switch using differnet IP

Hi Guys,

So I am not a FGT guru at all.

I run a FGGT60 using 7.2.11 b1740

Here is the scenario, isp has assigned me an IP range up until now I have just been using one. Now I need to use a second and route that IP to a server on port 5. Need that server to have full internet access but not be able to see anything else on the network.

Here is what I have done:

Created new hardware switch with only member port 5 - 192.168.15.1

  Server is on that port/switch is getting correct IP info 192.168.15.2 and has access to the internet

Now How do I route my second IP address to that port/switch?

Is this a simple routing issue or do I have to add a secondary IP address on the WAN1 port?

Sorry for what is probably a simple question but I can't seem to find a definitive cookbook article for this and since I am operating remotely I can't really just cowboy it..

thx John