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Asus RT-N66U Guide to Opening Ports

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In this guide we show you how to properly open a port for the Asus RT-N66U router.

Your Asus RT-N66U router has a basic Firewall. This firewall blocks unwanted access from the Internet. To unblock a connection that is normally blocked, you need to tell the firewall to keep that port open. This process of opening a port is frequently called a port forward. When you port forward you are telling the firewall to let that connection go directly through the firewall to a device on your network.

To open a port for the Asus RT-N66U router you need to:

  1. Setup a static ip address on the computer or game console you want these ports forwarded to.
  2. Login to your Asus RT-N66U router.
  3. Find your way to the port forwarding section.
    • Click the WAN button.
    • Click on Virtual Server / Port Forwarding.
  4. Make a port forward

Don't worry, we will be walking you through each and every step in the process to get your ports open on the Asus RT-N66U router.

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Step 1

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

Step 2


In order to login to the Asus RT-N66U router you need to use a web browser because this router utilizes a web interface.

Go ahead and open up your favorite web browser. This could be Chrome, Edge, Firefox, or Internet Explorer. It really doesn't matter what browser you decide to use.

After opening your browser you have to find the address bar. This is normally located along the top of the page, like this:

Once you have found the address bar, simply type your router's IP Address in there. Remember sometimes a router's IP Address is called the computer's default gateway.

By default the Asus RT-N66U router IP Address is:

After putting the IP Address of the Asus RT-N66U in the address bar, click the Enter button on your keyboard. You should then see the following screen:

Asus RT-N66U Screenshot 1

You are on the right track if you see a box asking for a username and password.

  • By default the Asus RT-N66U router username is: admin
  • By default the Asus RT-N66U router password is: admin

Enter the username and password and click the OK or Login button to access the web user interface of the Asus RT-N66U router.

The Asus Username and Password Do Not Work

If the username and password did not work, we recommend trying other common Default Asus Router Passwords.

If you still are having trouble accessing the web user interface it may be that you have changed the username and password in the past and have forgotten. It might be time to consider a reset. To learn more about this and how it affects your router, check out this How to Reset a Router guide.

Step 3

Find the Port Forwarding Section

To find the port forwarding section of the Asus RT-N66U router let's start on the first page after logging in:

Asus RT-N66U Screenshot 2

Under Advanced Settings in the left sidebar click the option of WAN.

Asus RT-N66U Screenshot 3

At the top of the page, a new set of tabs appears. Select the one labeled Virtual Server/Port Forwarding.

Step 4

Create a Port Forward

It is now time to enter the data into your router. In order for us to show you exactly how to do this you need to answer the following 2 questions.

Application :
IP Address :

(Make sure the IP Address above matches the static IP Address you setup in Step 1)

The next box or boxes are our router simulator. It shows you exactly what data to enter in your router based on how you answered the questions above. Currently we are showing the ports for XBox Live. Simply fill in the boxes on your router exactly as you see them below.

Once you are finished, click the Apply button to save your changes.

Test if Your Ports are Open

After you have finished forwarding these ports, it is a good idea to see if they were forwarded correctly.

Testing if your ports are open is easy with our Network Utilities tool, which includes a free Open Port Checker. This open port checker is only one online that has Guaranteed Results.

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