ps4 pro

Hi, I'm having a not so important situation with a PS4 Pro. I'm trying to have it set to "NAT Type 1: Open" unsuccessfully. Latest attempt, I have set the ip of the PS4. let's say 192.168.0.101 in the DMZ of the Modem/Router (Zyxel ax7501-b0). It's connected with ethernet cable, cat6, port...