Optimize NAT Type to Enjoy Call of Duty: Modern Warfare 4 Better

Call of Duty: Modern Warfare 4 will officially launch on October 23, 2026, and pre-orders are already available. Based on players’ experiences with previous titles, many are looking for ways to avoid matchmaking failures, party connection problems, and unexpected disconnections.

Your NAT type may be part of the problem. This guide explains what NAT means, how different NAT types affect Call of Duty multiplayer, and what you can do to improve your connection.

↑In past Call of Duty games, the NAT type is also displayed directly in-game.

What Is NAT?

NAT stands for Network Address Translation. It allows multiple devices in your home to share one public IP address while your router manages their individual local IP addresses.

You can think of your router as a receptionist. When your PC or console communicates with a Call of Duty server or another player, the router directs the traffic to the correct device.

In online multiplayer games, NAT also affects how easily your device can establish certain connections with game servers and other players.

PC and Xbox generally use Open, Moderate, and Strict NAT labels. PlayStation consoles, including the PS5, usually use Type 1, Type 2, and Type 3.

NAT Types Explained

The names vary by platform, but they generally describe similar levels of connection restriction.

Not every player can achieve Open NAT. Moderate NAT is common on home networks, shared connections, and networks behind carrier-grade NAT, also known as CGNAT.

Moderate NAT does not mean that you cannot play. Many players can matchmake, join games, and play with friends normally while using Moderate NAT. You only need to investigate further if it causes specific problems, such as long matchmaking times, failed party joins, voice-chat issues, or frequent disconnections.

Open NAT also does not guarantee low ping. NAT mainly affects connection compatibility, while ping and packet loss depend more on your network route, ISP, server location, and connection stability.

How Can NAT Type Affect Modern Warfare 4?

Strict NAT is more likely to cause multiplayer connection problems, but NAT is not always the only cause. You may experience the following issues when your network has significant connection restrictions.

Longer Matchmaking Times

A restrictive NAT can reduce the number of compatible connections available to your game. As a result, matchmaking may take longer to find a suitable lobby.

However, long matchmaking times can also result from server problems, low player populations, incorrect game settings, or regional matchmaking issues.

Problems Joining Friends

Moderate or Strict NAT may prevent you from joining a friend’s party or cause the connection to fail while entering a session.

If the problem happens repeatedly, check whether everyone is using the same game version and platform services are working normally. NAT is only one possible cause.

Party Chat and Social Connection Issues

NAT restrictions can sometimes affect party features, voice chat, and other player-to-player communication, especially when several players are behind restrictive networks.

If only one player cannot use voice chat or join the party, that player’s NAT, firewall, or local network may be responsible. If the entire party experiences the same problem, check the game or platform service status as well.

How to Optimize NAT Type in Modern Warfare 4?

Your NAT type depends on your network setup, including your router configuration, ISP restrictions, and whether your connection uses CGNAT or double NAT. It cannot be changed directly through the game’s settings.

However, you may be able to improve your NAT by enabling UPnP, configuring port forwarding, or removing a double NAT setup. No single method works for every network, so try the following steps in order.

Restart Your Router and Gaming Device

Start with the simplest solution.

Turn off your PC or console, then unplug your router for about 30 seconds. Restart the router first and wait until the internet connection is fully restored. Then start your gaming device and launch Modern Warfare 4.

This can refresh the router’s NAT session and resolve temporary connection problems. Check your NAT type again after reconnecting.

Enable UPnP on Your Router

UPnP, or Universal Plug and Play, allows compatible applications and devices to request the network ports they need automatically.

If UPnP is disabled, your router may not create the port mappings required by Modern Warfare 4.

Follow these steps:

1. Open your router’s administration page;
2. Find UPnP under Network, Advanced, or NAT settings;
3. Enable UPnP;
4. Save the settings and restart the router;
5. Launch Modern Warfare 4 and check your NAT type again.

Menu names vary by router brand and model. If you cannot find UPnP, check the router’s official documentation.

Use GearUP to Optimize NAT and Network Routes

GearUP is not only a tool for reducing ping after your NAT has already been optimized. It also provides NAT optimization that can help improve connection compatibility between your device and the game service.

If you have a restrictive NAT type or frequently experience long matchmaking times, failed party joins, and disconnections, you can try GearUP’s NAT optimization. If your NAT is already Open but the game still has high ping, packet loss, or unstable routing, GearUP can also help test and select a more suitable network route.

You just need to search for Modern Warfare 4 in GearUP and then start the network optimization.

For console players, you don't need to run the PC version of GearUP; if your router supports it, the GearUP plugin can provide a more convenient experience:

• ASUS partner router user guide
• ZTE partner router user guide
• OpenWrt router installation guide
• Steam Hardware Plugin Installation Guide

Use Port Forwarding

Port forwarding manually tells your router where specific network traffic should go.

Activision publishes platform-specific TCP and UDP port requirements for its Call of Duty titles. Its current documentation includes port information for games such as Modern Warfare II, Modern Warfare III, Warzone, and several Black Ops titles.

Because the official port requirements for Modern Warfare 4 may change after launch, do not copy an older game’s complete port list and assume it is correct for MW4.

To configure port forwarding:

1. Find the official port requirements for your platform and game version;
2. Log in to your router;
3. Open Port Forwarding, Virtual Server, or a similar setting;
4. Assign a static local IP address to your gaming device;
5. Add the required TCP and UDP rules;
6. Save the configuration;
7. Restart the router and the game.

Incorrect port forwarding may not improve your NAT and can create additional connection problems. If you are unsure which ports or settings to use, start with UPnP or follow your router manufacturer’s instructions.

Avoid VPNs and Unnecessary Proxies

VPNs and proxies change the route between your device and the game service. Depending on the VPN server and routing path, they may increase latency, introduce packet loss, or interfere with NAT behavior.

If you are troubleshooting Moderate or Strict NAT, temporarily disable your VPN, system proxy, and other applications that modify network routing. Then test Modern Warfare 4 through your regular internet connection.

If the problem improves after disabling them, the previous route may not be suitable for the game server. Avoid changing several network settings at once, or it will be difficult to determine which change solved the problem.

NAT Type vs. Ping: What’s the Difference?

These two terms are often confused, but they describe different parts of your connection.

NAT type mainly describes how easily your device can establish certain connections with game services and other players.

Ping measures how long data takes to travel between your device and the destination server. It is usually measured in milliseconds.

Activision notes that latency is strongly affected by factors such as your ISP and the geographical distance between you and the game server. This is why changing NAT alone does not always fix Call of Duty connection problems.

In simple terms:

• NAT mainly affects whether connections can be established successfully;
• Ping measures how long data takes to travel;
• Open NAT does not guarantee low ping;
• Low ping does not guarantee that you will avoid packet loss or disconnections.

Frequently Asked Questions

Does Open NAT guarantee low ping in Modern Warfare 4?

No.

Open NAT improves connection compatibility, but ping primarily depends on your network route, ISP, server location, and connection stability.

Can Wi-Fi cause Modern Warfare 4 connection problems?

Yes.

Wi-Fi interference, weak signal strength, network congestion, and other devices using the same connection can cause latency spikes and packet loss.

If possible, connect your PC or console through Ethernet and compare the results with your Wi-Fi connection.

Is Moderate NAT a problem?

Not necessarily.

Moderate NAT is common and does not automatically prevent you from playing. Many players can matchmake and join friends normally with Moderate NAT.

You should investigate it when you experience specific symptoms, such as long matchmaking times, failed party joins, voice-chat problems, or frequent disconnections.

Is Strict NAT always the reason I cannot play Call of Duty?

No.

Strict NAT can restrict multiplayer connections, but server outages, firewall settings, packet loss, DNS problems, and ISP routing can cause similar symptoms.

If only you cannot join a friend while other players remain connected, check your NAT, router, and firewall. If the entire party has problems, also check the game and platform service status.

Why is Modern Warfare 4 still laggy after I optimize my NAT?

NAT optimization mainly addresses connection compatibility. It does not always improve the route between your device and the game server.

If your NAT is already Open but ping remains high, check your server region, Wi-Fi stability, background network activity, and ISP route. You can also use GearUP to test an alternative connection route.

In Short

NAT is an important part of the online connection experience in Call of Duty: Modern Warfare 4. It determines how easily your device can connect with game services and other players, while your network route affects latency and stability. Understanding the difference between NAT type and ping can help you identify connection problems more accurately and choose the right way to improve your multiplayer experience.