Place it's new LAN IP into the DMZ?
As you must have technical background and staff to run a server, my answer would not need expansion.
There is a PC (server) which has the ISP connection, and the ISP assigned to that connection an external static IP.
Now I want to install WiFi Router, so entry point from ISP with its static IP will be taken by that router.
My question is: how to connect that router in a way, when the server PC is still keeping the initial entry point with static IP?
Well, my question is for network architecturer and experienced network admins.. Thanks