Arris TM502b 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:
While these steps might seem difficult at first, we will walk you through each step for your Arris TM502b router.
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When you use Network Utilities you get your port forwarded right now!
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.
Now we are going to login to your Arris TM502b 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:
In the picture above the address bar has 192.168.2.1 in it. Just replace all of that with the IP address of your Arris TM502b router. Your router's IP address can also be refered to as your computer's default gateway.
By default the IP address is set to: 192.168.2.1
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.
Enter your username and password, and then click the Login button to log in to your Arris TM502b router.
Arris Usernames and Passwords
If your username and password do not work then please visit our Default Arris Router Passwords page.
If you still can't login to your router because you forgot your Arris TM502b router username and password, use our How to Reset a Router Password guide to set your Arris TM502b 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 General Setup button near the left of the page.
Click the NAT link near the left of the page.
You should now see a new menu. In this new menu, click Virtual Server or Port Forwarding.
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:
Forwarding a Single Port
Verify that you have the Enable Virtual Server checkbox checked.
Enter the IP address that you are forwarding ports to in the Private IP box. This is either the IP address of a computer or the IP address of another device on your network.
Enter the port to forward into the Private Port and the Public Port boxes.
Select the required protocol for these ports from the Type dropdown box.
You need to name this entry in the Comment box. The name does not make any difference in the forward; it's just there so that you can remember later why you setup this forward.
When you are done click the Add button.
Most people will never need to use this, but I'm going to explain why they have Private Port and Public Port here.
The Private Port and Public Port entries are actually rather useful. They are there so you can direct traffic at two devices on your network.
Let's say that you have two devices running Ftp servers on your network. Let's call these devices device one(192.168.2.1) and device two(192.168.2.1).
Let's also say both these ftp servers are running on port 21. Okay we setup your router to forward port 21 to device one(192.168.2.1:21).
So every external IP address request from ftp goes to device one. How do we get to the second device? Well the Private Port and Public Port entries allow us to specify another outside port to connect to our internal port 21. Lets make the additional port, port 30. We would now setup a rule in the router with the Public Port set to 30 and the Private port set to 21. The IP address in that rule would be 192.168.2.1. So when you wanted to ftp to device two you would specify port 30 in your ftp client.
The router would see these requests coming in on port 30 and forward them to (192.168.2.1:21). This would allow you to ftp to both devices.
Forwarding a Port Range
Put a checkmark in the Enable Port Forwarding checkbox.
Enter the IP address of the device that you want to forward ports to into the Private IP box. This can be either the IP address of your computer or the IP address of another device on your network.
Select the protocol type of the ports you are forwarding from the Type box.
If you are forwarding a range of ports separated by a hyphen then enter the lowest number of that range into the Left Port Range box and the highest number of that range into the Right Port Range box. If you are only forwarding a single port number then enter that number into both the Left Port Range and the Right Port Range boxes.
Put a name for this forward in the Comment box so that you can remember why you set this forward up. The name does not matter so pick something that has meaning to you.
When you are done click the Add button.
Your ports should now be open. It is time to test them.
Now that you have forwarded ports on the Arris TM502b 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.
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