Technicolor DPC3939_-_XFINITY routers include a very basic firewall that helps protect your home network form unwanted access from the internet. Since this firewall blocks incoming connections you may need open a port through it for certain games and applications. This process of opening a port is frequently called a port forward, since you are forwarding a port from the internet to your home network.
The basic process to open a port is:
- Setup a static IP address on either your computer or device that you want to forward a port to.
- Login to your Technicolor DPC3939 router.
- Navigate to the port forwarding section.
- Click the Advanced link.
- Click on Port Forwarding.
- Click the Add Service button.
- Create a port forward entry.
While these steps might seem difficult at first, we will walk you through each step for your Technicolor DPC3939_-_XFINITY router.
It is important to setup a static ip address in the device that you are forwarding a port to. This ensures that your ports will remain open even after your device reboots.
- Recommended - Our free program will setup a static IP address for you. Download Network Utilities today!
- Another highly recommended way of getting a permanent IP address is to set up a DHCP Reservation.
- Or, follow our Static IP Address Setup guides.
With DHCP reservations you can manage your devices from your router. This centralizes the management of your network and helps prevent IP address conflicts. Using this method you do not have to log in to your devices separately.
Now we are going to login to your Technicolor DPC3939_-_XFINITY router. Your router has a web interface, so you will login to it using your web browser. This can be either Chrome, Firefox, Internet Explorer, or Edge. It usually does not matter which browser you choose to use.
Open up your web browser and find the address bar. It should look something like this:
Above is an example of what a web browser address bar looks like. Find the address bar in your router and type in your router's IP address.
The default Technicolor DPC3939 IP Address is: 10.0.0.1
After entering the IP address of your router you can simply press enter. If all goes well you will see the following screen:
You should see a box prompting you for your username and password.
- The Default Technicolor DPC3939 Router Username is: admin
- The Default Technicolor DPC3939 Router Password is: password
Enter your username and password, and then click the Login button to log in to your Technicolor DPC3939_-_XFINITY router.
Technicolor Usernames and Passwords
If your username and password do not work then please visit our Default Technicolor Router Passwords page.
If you still can't login to your router because you forgot your Technicolor DPC3939_-_XFINITY router username and password, use our How to Reset a Router Password guide to set your Technicolor DPC3939_-_XFINITY router back to its factory settings.
Now we need to find the port forwarding section in your router. Here's how you do it. Starting from the first page in your router:
Click the Advanced link near the left of the page.
You should now see a new menu. In this new menu, click Port Forwarding.
Click the Add Service button near the center of the page.
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:
From the Services Name dropdown box pick Other.
Enter the name of the program into the Other Service box. It doesn't really matter what you put into this box, but something that will remind you why these ports are being forwarded is be a good idea.
The protocol that you want to forward is selected from the Service Type box.
You need to enter the IP address that you are forwarding ports to in the Server IP Address box. It's possible for this to be either the IP address of your computer or any other IP address on your network that you want ports forwarded to.
If you are just forwarding a single port number then you can simply enter that same number into both the Start Port and the End Port boxes. If you are forwarding a range of ports, usually separated by a hyphen, then you need to enter the lowest number of that range into the Start Port box and then enter highest number into the End Port box.
When you are done click the Save button.
Your ports should now be open. It is time to test them.
Test if Your Ports are Open
Now that you have forwarded ports on the Technicolor DPC3939_-_XFINITY you should test to see if your ports are forwarded correctly.
To test if your port has been properly forwarded, you can use our Network Utilities tool, which includes a free Open Port Checker. Our Open Port Check tool is the only online port checking tool with Guaranteed Results.
Technicolor DPC3939_-_XFINITY Router Screenshots
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