Why Is My NAT Type Strict? 7 Causes & How to Fix It

Your NAT type is strict because your router's firewall is blocking the incoming connection requests that online games and voice chat need to reach your device directly — this happens when UPnP is disabled, required ports are closed, or your network uses multiple layers of NAT (such as an ISP gateway stacked with your own router).

What NAT Type Actually Means for Your Gaming Connection

NAT (Network Address Translation) is how your router lets multiple devices share a single public IP address — and your NAT type reflects how restrictive your router's firewall is about letting outside connections reach your device.

When you connect to the internet, your router assigns your console or PC a private IP address (like 192.168.1.15) while presenting a single public IP to the outside world. NAT handles the translation between these addresses. The strictness of that translation determines your NAT type.

There are three NAT types you'll encounter:

Strict NAT means your router is dropping incoming connection requests before they ever reach your device. Your console can reach out to game servers, but other players can't reach back to you directly.

7 Reasons Your NAT Type Is Strict in 2026

Is UPnP Disabled on Your Router?

UPnP (Universal Plug and Play) automatically opens the ports your games need — and it's the most common reason for strict NAT when it's turned off.

Most modern routers have UPnP enabled by default, but some ISPs disable it for security reasons, or it may have been switched off during a firmware update. Without UPnP, your router has no way to know which ports your console needs open, so it blocks incoming connections by default.

To check: Log into your router's admin page (usually 192.168.1.1 or 192.168.0.1), find the UPnP setting under Advanced or NAT settings, and enable it. Restart both your router and console afterward.

Are You Behind Double NAT?

Double NAT occurs when you have two devices performing network address translation — typically your ISP's gateway plus your own router — and it's notorious for causing strict NAT.

Here's what happens: your ISP gives you a modem/router combo that assigns your router a private IP address (often starting with 10.x.x.x or 192.168.x.x). Your router then performs its own NAT for your devices. Incoming game traffic now has to pass through two firewalls, and the first one has no idea how to forward it to the second.

Signs you have double NAT:
- Your router's WAN IP address starts with 10., 172.16-31., or 192.168.
- You're using an ISP-provided gateway plus your own router
- Port forwarding works on your router but NAT stays strict

The fix: Either put your ISP's gateway into bridge mode (so it passes traffic straight to your router) or connect your console directly to the ISP gateway and configure port forwarding there.

Are Required Ports Blocked or Closed?

Every online game needs specific network ports to communicate — and if your router or ISP is blocking them, you'll get strict NAT even with UPnP enabled.

Different platforms require different ports:

You can manually forward these ports in your router's settings by assigning your console a static IP address and creating port forwarding rules. This is more reliable than UPnP but requires reconfiguration if your device's IP changes.

Is Your Firewall Software Too Aggressive?

Third-party firewall software on your PC, or an overly restrictive router firewall setting, can override your NAT configuration and block gaming traffic.

Windows Firewall rarely causes issues with games, but security suites like Norton, McAfee, or Bitdefender often include their own firewalls that can block gaming ports. Some routers also have an "SPI Firewall" or "DoS Protection" setting that, while useful against attacks, can interfere with legitimate game traffic.

"Network Address Translation is fundamentally a workaround that was never designed with peer-to-peer gaming in mind. The firewall has no way to distinguish between a legitimate game connection request and a potential attack." — IETF RFC 4787

Try temporarily disabling third-party firewall software to see if your NAT type changes. If it does, add exceptions for your game or gaming platform rather than leaving the firewall off permanently.

Does Your ISP Use Carrier-Grade NAT?

Some ISPs use Carrier-Grade NAT (CGNAT) to share a single public IP address among multiple customers — and there's nothing you can do on your router to fix strict NAT caused by this.

CGNAT is common among mobile/cellular internet providers and some budget ISPs trying to conserve IPv4 addresses. When you're behind CGNAT, your router never sees a true public IP address. Port forwarding and UPnP become meaningless because the NAT happening at your ISP's level is outside your control.

To check if you're behind CGNAT: Compare the WAN IP address shown in your router's admin page to the IP shown on a site like whatismyip.com. If they're different, you're behind CGNAT.

The fix: Contact your ISP and request a dedicated public IP address. Some ISPs offer this for free upon request; others charge a small monthly fee. If your ISP won't provide one, consider switching providers or using a gaming VPN service that provides dedicated gaming servers designed to bypass NAT restrictions.

Is Your Router's Firmware Outdated?

Older router firmware can have bugs in its NAT implementation or UPnP handling that cause persistent strict NAT issues, even with correct settings.

Router manufacturers regularly release firmware updates that fix NAT-related bugs. A router running firmware from 2023 may struggle with newer gaming protocols or have known UPnP vulnerabilities that were patched in later versions.

Log into your router's admin page and check for firmware updates. Most routers have an automatic update check button under Administration or System settings. After updating, reset your NAT-related settings (UPnP, port forwarding) and restart your console to test.

Is Your Console's Network Configuration Incorrect?

Sometimes the issue isn't your router at all — your console or PC may have network settings that conflict with NAT traversal.

Common configuration issues:
- Manual DNS settings that conflict with your ISP
- A static IP address that's outside your router's DHCP range
- MTU settings that don't match your network
- IPv6 disabled when your network supports it (or enabled when it doesn't)

Try resetting your console's network settings to default and letting it auto-configure. On PlayStation, go to Settings > Network > Set Up Internet Connection and use "Easy" setup. On Xbox, go to Settings > Network > Network Settings > Advanced Settings > Alternate MAC Address > Clear.

Also Read: Why Is My DisplayPort Not Working? 8 Causes & Fixes

How to Fix Strict NAT: Step-by-Step Guide

Follow these steps in order — each one builds on the previous, and most players will have open NAT by step 3.

Step 1: Enable UPnP on Your Router

1. Open a browser and go to your router's admin page (192.168.1.1 or 192.168.0.1)
2. Log in with your admin credentials (often printed on the router itself)
3. Navigate to Advanced Settings, NAT, or Gaming sections
4. Find UPnP and switch it to Enabled
5. Save settings and restart your router
6. Restart your console and test your NAT type

Step 2: Check for Double NAT

1. Note your router's WAN IP address (shown on the admin dashboard)
2. Visit whatismyip.com and compare the IP shown
3. If they match, you're not behind double NAT — skip to Step 3
4. If they differ (especially if your WAN IP starts with 10. or 192.168.), you have double NAT
5. Contact your ISP about enabling bridge mode, or connect your console directly to the ISP gateway

Step 3: Set Up Port Forwarding

1. Give your console a static IP address (either in the console's settings or via DHCP reservation on your router)
2. In your router's port forwarding section, create rules for your platform's required ports (see table above)
3. Point all rules to your console's static IP
4. Save and restart both router and console

Step 4: Place Console in DMZ (Last Resort)

The DMZ (demilitarized zone) setting opens all ports to a specific device. It's less secure than targeted port forwarding but guarantees open NAT.

1. Assign your console a static IP address
2. Find the DMZ setting in your router's firewall or gaming section
3. Enter your console's IP address and enable DMZ
4. Test your NAT type

"When troubleshooting NAT issues, placing a single gaming device in the router's DMZ is an acceptable solution since modern consoles have their own built-in firewalls. The security risk is minimal for dedicated gaming devices that don't store sensitive data." — Microsoft Xbox Support Documentation

Also Read: Why Is My TV Flickering? 8 Causes & Quick Fixes

Quick Comparison: NAT Fix Methods

In Short

Strict NAT happens when your router's firewall blocks incoming gaming connections — usually because UPnP is disabled, you're behind double NAT, or your ISP uses Carrier-Grade NAT. Start by enabling UPnP in your router settings, check whether your router's WAN IP matches your public IP (to rule out double NAT), and set up port forwarding for your specific gaming platform if needed. If you're stuck behind CGNAT, contact your ISP for a public IP or use a gaming VPN to route around the restriction.

What You Also May Want To Know

How Do I Check My NAT Type on PlayStation, Xbox, or PC?

On PlayStation, go to Settings > Network > View Connection Status, and your NAT type will be listed. On Xbox, navigate to Settings > General > Network Settings, where NAT type appears on the main screen. On PC, the method varies by game — in Call of Duty, check Settings > Account & Network; in Rocket League, it's shown in the main menu's network stats.

Does Strict NAT Actually Affect My Gameplay?

Yes, significantly. With strict NAT, you can only matchmake with players who have open NAT, which dramatically shrinks your player pool and increases wait times. Voice chat often fails entirely, you'll be unable to host matches or join friend-hosted lobbies, and you may experience more frequent disconnections mid-game.

Can a VPN Fix Strict NAT?

A VPN can bypass NAT restrictions in specific cases, particularly when your ISP uses Carrier-Grade NAT. By routing your traffic through the VPN's servers, your gaming device appears to have the VPN's IP address and NAT configuration rather than your own. Gaming-focused VPNs often provide servers optimized for low latency and open NAT. However, a VPN won't help if the issue is simply UPnP being disabled on your own router.

Is Open NAT Less Secure Than Strict NAT?

Open NAT does accept more incoming connections, but the practical security difference for gaming devices is minimal. Your console already has built-in protection against malicious traffic, and gaming traffic uses specific protocols that differ from attack vectors. The benefits of stable connections and full multiplayer functionality far outweigh the marginal security difference for most users.

Why Does My NAT Type Keep Changing Back to Strict?

If your NAT type reverts to strict after fixing it, your console's IP address is likely changing. When you set up port forwarding, you point the rules to a specific IP — if your console gets a new IP from DHCP, those rules no longer apply. Assign your console a static IP address (either in the console's settings or via DHCP reservation on your router) to prevent this.

Reviewed and Updated on June 9, 2026 by George Wright