Network Utilities

Fastest Sagemcom Fast 3864V3HP Router Port Forwarding Instructions

Your Sagemcom Fast 3864V3HP router protects your home network by limiting incoming connections from the internet. Sometimes it is necessary to unblock some of those connections like when you want to create a direct connection for gaming, use a specific application, or set up a new device on your network. This process is called forwarding or opening a port. In your Sagemcom Fast 3864V3HP router you many need to open a port which means assigning a port number or set of port numbers to a specific IP address. This routes the incoming data to the correct device on your network.

Follow these steps to open a port in your Sagemcom Fast 3864V3HP router:

  1. On the computer or device that you are forwarding ports to, you will need to set up a static IP address.
  2. Login to your Sagemcom Fast 3864V3HP router.
  3. Make your way to the Virtual Server section of the Sagemcom Fast 3864V3HP router.
    • Click on the Advanced Settings link at the left of the screen.
    • Click the Advanced Setup link, which can be found at the left of the screen.
    • Click on the NAT link.
  4. Create a Virtual Server entry.

The process of opening ports in your router may seem like a difficult task. If so, you are not alone! We are here to help walk you through the steps to open a port in the Sagemcom Fast 3864V3HP router.

We think that forwarding a port should be easy. That's why we created Network Utilities. Our software does everything that you need to forward a port.

Get Started Now!

When you use Network Utilities you get your port forwarded right now!

Step 1 - Setup A Static IP Address

In order to keep the ports in your router open, even after a reboot or disconnect, it is important to set up a static IP address in the device that you are forwarding a port to.

  • Recommended - Our free program will setup a static IP address for you.

    → Download Network Utilities today!

  • Or follow our Static IP Address guides to setup a static IP address.

After setting up a static ip address on your devices you need to login to your router.

Step 2 - Login To Your Sagemcom Router

In order to login to the Sagemcom Fast 3864V3HP router you need to use a web browser. The Sagemcom Fast 3864V3HP router uses what is called a web interface where you can access and control router settings.

Go ahead and open up your favorite web browser. If you don't have a favorite or are not sure what this means, open up Chrome, Firefox, or Internet Explorer.

If this step is confusing, we have simplified it for you with this link: Login to your Fast 3864V3HP Router

Find the address bar once you have opened up a web browser. This is usually located at the top of the page, like in the image below.

In the screenshot above you should see an address bar with the address of in it. This is your router's IP address, sometimes called the computer's default gateway.

The Sagemcom Fast 3864V3HP router's default IP address is:

Enter your router's IP address into the address bar of your browser and click the enter button on your keyboard. A box like the one below should appear.

Basic Authentication

Enter the username and password for the Sagemcom Fast 3864V3HP in the corresponding boxes. Important Note: If you have changed them in the past, you need to enter in those values.

  • The default Sagemcom Fast 3864V3HP Router Username is: optus
  • The default Sagemcom Fast 3864V3HP Router Password is: provided by optus

To log in to your Sagemcom Fast 3864V3HP router, enter your username and password, and then click the Log In button.

Sagemcom Username and Password Trouble

If the username and password that you typed in did not work, check out our Default Sagemcom Router Passwords page for other ideas about possible passwords.

If, after trying the above list of passwords you still can't log in, you may need to reset your router. Learn how to do that by reading our How to Reset a Router guide. After resetting the Sagemcom Fast 3864V3HP router your username and password are reverted back to factory defaults. Router settings may also change when you reset, so make a note of your current router settings before you reset.

Step 3 - Find The Port Forwarding Section

After successfully logging in to your Sagemcom Fast 3864V3HP router you should see the router's home page on your screen. Find the Virtual Server section of your router.


  • Find the Advanced Settings link located near the left of the screen and click on it.
  • Click on the Advanced Setup link, which can be found at the left of the screen.
  • Click the link that says NAT.

You are now on the Virtual Server page.

port forwarding

Step 4 - Create A Port Forward Entry

Forwarding ports in your router creates a path that allows data to get through your network firewall and it is possible that this could lead to malicious traffic on your network. So make sure that it is really necessary for you to forward a port before actually doing so. However, the risk is very low, so do not let this warning stop you from making this change if you need to.

Here are the ports to forward for Xbox Live:

TCP Ports:3074
UDP Ports:3074

If you are looking for the ports for a different application you can find it by either:

  1. Click on the Add button.

  2. Click on the radio button labeled Custom.

  3. Type in a name for this forward in the Custom box. Choose a name that will help you remember why this forward was set up since it does not effect the functionality of the forward.

  4. Find the Server IP Address box and enter the IP address that you want ports forwarded to. This can be either the IP address of your computer or any other IP address for devices on your network that you want to forward ports for.

  5. To forward a single port, enter the port number into the External Port Start and the External Port End boxes. To forward a range of ports, enter the lowest number in the range into the External Port Start box. Then enter the highest number in the range into the External Port End box.

  6. Use the Protocol dropdown box to select the protocol type of the ports you are forwarding. If your router has the option of Both then choose that. Otherwise select either TCP or UDP as needed. If you need to forward a port for both TCP and UDP and your router does not have Both then you have to create two entries.

  7. Enter the same values into the Internal Port boxes that you entered into the External Port boxes.

  8. Make sure to click the Apply button at the bottom of the page to apply these changes, when you are completely finished.

Test If Your Ports Are Open

Finally, I strongly recommend testing to see if you forwarded the Sagemcom Fast 3864V3HP ports correctly. To do this you can use our Network Utilities tool, which includes a free Open Port Checker. Open Port Checker is the only online port checking tool that has Guaranteed Results.

More Guides To Check Out: