Comcast Xfinity NAT Settings Guide
Configure your Xfinity xFi Gateway for Open NAT and optimal gaming performance
Xfinity App Method: The easiest way to manage settings is through the Xfinity app. Download it for iOS or Android for simpler configuration.
Xfinity Gateway Models
Different xFi Gateway models have varying capabilities
xFi Advanced Gateway (XB7/XB8)
- WiFi 6/6E support
- Built-in security
- Advanced port forwarding
Best for gaming
xFi Gateway 3rd Gen (XB6)
- Dual-band WiFi
- Standard port forwarding
- Good performance
Suitable for most users
Older Models (XB3)
- Basic features
- Limited customization
- May need replacement
Consider upgrading
Step-by-Step Configuration
Access Xfinity Admin Panel
- 1.Connect to your Xfinity network
- 2.Open browser and go to 10.0.0.1
- 3.Login with admin/password (check gateway label)
- 4.Or use Xfinity app for easier access
Enable Bridge Mode (Optional)
- 1.Go to Gateway > At a Glance
- 2.Select "Enable Bridge Mode"
- 3.Use your own router for better control
- 4.Restart gateway after enabling
Bridge mode disables WiFi on xFi Gateway
Configure Port Forwarding
- 1.Navigate to Advanced > Port Forwarding
- 2.Click "Add Port Forward"
- 3.Enter device IP and ports
- 4.Save and apply changes
Set Up DMZ (If Needed)
- 1.Go to Advanced > DMZ
- 2.Enter gaming device IP address
- 3.Enable DMZ for that device
- 4.Use only if port forwarding fails
Common Gaming Ports
Port numbers to forward for popular gaming services
| Service | TCP Ports | UDP Ports |
|---|---|---|
| Xbox Live | 3074 | 88, 500, 3074, 3544, 4500 |
| PlayStation | 80, 443, 3478, 3479, 3480 | 3478, 3479 |
| Nintendo Switch | 6667, 12400, 28910 | 1-65535 |
| Call of Duty | 3074 | 3074 |
| Fortnite | 5222 | 5060-5062 |
Xfinity Advanced Security
Xfinity Advanced Security may block gaming ports. You might need to disable it.
To Disable Advanced Security:
- 1. Open Xfinity app
- 2. Go to Connect → Advanced Security
- 3. Toggle off Advanced Security
- 4. Confirm the change
Note: Disabling reduces protection but improves gaming connectivity
Troubleshooting Common Issues
Cannot access 10.0.0.1
- Try 10.1.10.1 instead
- Use Xfinity app
- Reset gateway to defaults
- Check if in bridge mode
Port forwarding not working
- Disable Advanced Security in app
- Check device has static IP
- Verify firewall settings
- Restart after changes
Double NAT detected
- Enable bridge mode
- Remove secondary router
- Configure DMZ for router
- Contact Comcast support
Xfinity-Specific Tips
Use Ethernet When Possible
xFi Gateways have multiple ethernet ports for wired connections
Enable IPv6
Can bypass some NAT issues entirely
Use 5GHz Band
Less interference than 2.4GHz for gaming
Check for Firmware Updates
Xfinity automatically updates, but you can check in settings