DMZ More conservative (stable frametimes matter more than peak FPS)
Warzone (from S1, 6 Nov) More conservative
Network, ports & NAT
How to go about it
Test 1: port forwarding off, UPnP on, check in the game.
Test 2: UPnP off, port forwarding on, give the device a static local IP.
Test 3 (console only): put the console's IP in the router's DMZ.
Network, ports & NAT
Platform
TCP
UDP
Xbox Series X/S
TCP 3074
UDP 88, 500, 3074, 3544, 4500
Network, ports & NAT
Setting
Value
Why
Cable instead of Wi-Fi
Always LAN
QoS on the router
Turn it on, prioritize your gaming device
Bandwidth
Avoid streaming/downloads at the same time
Check your NAT type
Settings → Account & Network → Network Info
Shows your IP!
Packet burst
No client-side fix known
DNS changes, network adapter tweaks
No proven benefit for MW4
(Myth)
Ping
Depends mainly on your ISP and the distance to the server
Console
Console
Setting
Value
Why
120 Hz
120 Hz in the TV/display options
VRR
On
ALLM / TV game mode
TV game mode on
Lower input lag
HDR
Run the system-wide HDR calibration, then the in-game sliders
No reliable MW4 target values known (Unconfirmed)
Rest mode
Avoid it for CoD; close the game fully
Clearing the cache
Power off completely, unplug for 60 sec.
Storage
Leave enough free SSD space; reinstall if it keeps stuttering; also install all content packs
Network
LAN; NAT Type 1/2 or Open; ports: see the Network section; router DMZ as a last resort
Checked 18 Oct.
MP launch: 23 Oct 2026 · DMZ Early Access: 20 Oct 2026 · Warzone integration (Season 1): 6 Nov 2026.
MW4 hasn't launched yet. File names, keys, menus and defaults can change with the launch patch (23 Oct) and Warzone Season 1 (6 Nov); the config file was already renamed between the beta weekends. Keep a backup, change one thing at a time.