@Clive_A I removed the Router from the Omada Controller to have it standalone and changed the configuration you pointed out and it still didn't work. There is no reason why a DMZ from the ISP Router...

@Clive_A Thank you Clive, Yes, I have tested the ISP Roture DMZ and mentioned in the original post. When I connect the server directly to the ISP router and configure DMZ or port forwarding requests...

My ISP provides an all-in-one device and does not allow Bridge Mode for "security concerns". I have a business plan with a static public IP and very limited direct access to router configuration....