NFS Underground Port Forwarding - Easy Guide

# 🎮 NFS Underground Port Forwarding - Easy Guide

⏱️ How long does it take?
- If you know a bit about PCs: about 20-30 minutes
- If you are a complete beginner: about 45-90 minutes

💡 Don’t worry: It looks harder than it is.
Just follow the steps one by one. Even if you are new, you can do it.

⚠️ Important: Every router looks a bit different!
If something does not look the same on your screen, search Google or YouTube for a guide with your router model.

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## 🛠 Step 1 - The Ports You Need
- Open these ports in your router:

1. UDP 3658-3659

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## 💻 Step 2 - Give Your PC a Fixed IP (Safe Method)

Your PC needs a “fixed address” so your router knows where to send game data.

### Step 2a - Find your network information
1. On Windows: press Windows key + R, type cmd and press Enter or (Linux) open Terminal
2. Type ipconfig (Windows) or ip a (Linux) and press Enter
3. Look for your network adapter (usually “Wi-Fi” or “Ethernet”)
4. Note:

1. IPv4 Address: something like 192.168.178.15
   
2. Default Gateway: something like 192.168.178.1
   

This tells you the network range (first three numbers) and your router’s IP.

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### Step 2b - Pick a safe IP for your PC
- Pick a number at the end of your IP that is higher than normal to avoid conflicts.
- Example: if your IP is 192.168.178.15, pick 192.168.178.200
- This will be your PC’s fixed IP.

💡 Tip: Always keep the first three numbers the same as your current IP. Only change the last number.

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### Step 2c - Set the IP on Windows
1. Open Control Panel
2. Go to: Network and Internet → Network and Sharing Center → Change adapter settings
3. Right-click your connection → Properties → Internet Protocol v4 → Properties
4. Select “Use the following IP” and type:

1. IP: your chosen IP, e.g., 192.168.178.200
   
2. Subnet mask: 255.255.255.0
   
3. Default gateway: your router IP, e.g., 192.168.178.1

💡 Optional: Some routers allow DHCP Reservation. This automatically gives your PC the same IP and is easier.

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## 🌐 Step 3 – Login to Your Router
1. Open your web browser
2. Type your default gateway IP (from Step 2a) into the address bar and press Enter
3. Login with username + password (usually on the router sticker or manual)

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## 🚪 Step 4 – Add Port Forwarding
1. Look for Port Forwarding, Virtual Server, NAT, or Gaming in the router menu
2. Create a new rule:

1. Name: NFS Underground
   
2. Protocol: UDP
   
3. Ports: Start 3658, End 3659
   
4. Internal IP: your fixed PC IP (from Step 2b)
   

3. Save and apply

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## 🔥 Step 5 – Firewall Check
- Windows: Open Firewall → Allow a program or port → Add UDP 3658-3659
- Linux: Use your firewall tool to allow the same ports
💡 If nothing works, reset your firewall to default settings (in Windows Defender Firewall):

Then add the firewall rules with kickStart again (in options):

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## ✅ Step 6 - Test Your Game
1. Start NFS Underground → Create a multiplayer game
2. Ask a friend to join 3. Or open the NFS.onl launcher and go to Open settings → Main config → UPnP Port Forwarding and Testing.
When the new window opens, click on “Test UDP” to check if your port forwarding is set up correctly. —

## 🚫 If It Still Doesn’t Work
- Make sure your PC IP matches the rule in the router
- Make sure ports 3658-3659 UDP are forwarded
- Check firewall again
- If your ISP uses CGNAT, normal port forwarding will not work. Then you need a VPS server see Redhair’s YouTube Guide

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## 📋 Extra Tips
- Always keep your PC on the same IP
- Only open the ports you need
- Test with 1 friend first before a big game
- Write down your router login and rules for later

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# 📖 Word Explanations (Simple)

- Port = A “door” number on your router that lets game data in or out.
- UDP = A fast type of connection for games.
- IP Address = Your PC’s “house number” inside your network.
- Gateway = The “main door” to your router.
- Router Login = The page where you change your router settings.
- Firewall = A security wall on your PC that can block connections.
- Port Forwarding = Telling the router: “Send all game data on this port to my PC.”
- DHCP Reservation = A router option that gives your PC the same IP automatically.
- CGNAT = Your internet provider puts many people behind one big router. Then port forwardin