Radius Server Setup Without Static IP for the routerOS

I am new to mikrotik, and networking as well. I am trying to setup a hotspot with RADIUS authentication.

Here’s my setup:

Computer with 2 NICs running routerOS. The lan network 192.168.88.0/24 is on ether2 interface. Ether1 is the wan interface and is getting it’s ip information dynamically from the ISP. Routing is setup and is working.

I setup a hotspot on ether2 interface with radius authentication. This is also working properly.

Question is I’m running tekRadius on a cloud server with a static ip. When I setup the RADIUS client for the routerOS in the tekRadius manager I have to enter a ip address for the client. I enter the current ip that ether1 interface pulled from the ISP and eveything works great. But when I get a new ip from the ISP the system stops working until I log into the cloud server and update the information for the RADIUS client in the tekRadius manager.

Is it possible to use Radius authentication if I have the Radius server running on a server with a static ip but my routerOS wan interface pulls a dynamic ip from the ISP?

Thanks for any help on this