Use ISP Static IP from ADSL Modem on Mikrotik

hello guys
I’m confused to run this senario , I have a ADSL Modem and got Static IP from ISP
This Modem is connected to Ether2 on mikrotik , I did : ip addresses add x.x.x.x/24 interface=ether2
but I guss there is more I have to do , cus now I can connect to my Mikrotik with static ip just within my local network , I have no ping from this static IP from outside local network
do I need to enable DMZ on my ADSL modem ? if yes what IP should I set in modem DMZ setting ?
also do I need to set a NAT for dst-port Moden IP to Static IP ?
Thanks

If you want to use static public IP address on your own router, connected to ISP-provided gadget, then that gadget has to be configured into “bridge mode”. And that’s true for all vendors of your own router, not only Mikrotik. How to put ISP’s gadget into “bridge mode” again depends on particular model/vendor of that gadget.

After you do that, ISP’s gadget will be transparent (from IP layer point of view) and you’ll have to do all the firewall / NAT / etc. on your router.