Dmz open network

[NinaRicci2011]

Best 

@home i have modem connect whit netduma router and thén al other device connected whit Netduma .

i have set the netduma wan ip in dmz in my modem 

must i set something in dmz from the netduma ,? 
before the netduma i had set the wan ip from ps5 in my modem and then there was open network whit call of duty 

yesterday i was playing call of duty whit Much lag , 

Speed

Ping

Ping Under Load

19:04

05 nov 24

D

A+

A+

My speedtest give the hole time D , ping is perfect