How to Forward Ports in a ZyXEL Prestige 623 Router

Thumbnail image of Port Forward Staff
Port Forward Staff
September 19, 2018 (Last Updated: ) | Reading Time: 3 minutes

ZyXEL Prestige623 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:

  1. Setup a static IP address on either your computer or device that you want to forward a port to.
  2. Login to your ZyXEL Prestige 623 router.
  3. Navigate to the port forwarding section.
    • Click the NAT link.
    • Click Edit Details.
  4. Create a port forward entry.

While these steps might seem difficult at first, we will walk you through each step for your ZyXEL Prestige623 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

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.

This step is important because you want a permanent IP address in your device. If you do not set up a permanent IP address in your device, then when you device reboots it may get a new IP address.

Use a VPN Instead

Have you considered using a VPN instead of forwarding a port? For most users, a VPN is a much simpler and more secure choice than forwarding a port.

NordVPN birthday deal!

We use and recommend NordVPN because not only is it the fastest VPN, it includes a new feature called Meshnet that makes forwarding a port no longer necessary for most applications. With NordVPN Meshnet, you can connect to your devices from anywhere in the world, completely secure, over a highly encrypted VPN tunnel.

Every time you click on one of our affiliate links, such as NordVPN, we get a little kickback for introducing you to the service. Think of us as your VPN wingman.

Step 2

Now we are going to login to your ZyXEL Prestige623 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:

Image of a browser address bar
Browser address bar

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 ZyXEL Prestige 623 IP Address is: 192.168.1.1

After entering the IP address of your router you can simply press enter. If all goes well you will see the following screen:

ZyXEL Prestige623
ZyXEL Prestige623.

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 ZyXEL Prestige623 router.

ZyXEL Usernames and Passwords

If your username and password do not work then please visit our Default ZyXEL Router Passwords page.

If you still can't login to your router because you forgot your ZyXEL Prestige623 router username and password, use our How to Reset a Router Password guide to set your ZyXEL Prestige623 router back to its factory settings.

Step 3

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:

ZyXEL Prestige623
ZyXEL Prestige623.

Click the NAT link near the center of the page.

ZyXEL Prestige623
ZyXEL Prestige623.

There should be a dot in the SUA Only setting. If this isn't the case, you can not setup port forwarding without making a major change to your network. I wouldn't advise changing this unless you know what you are doing. Alright, if there is a dot in the SUA Only setting, go ahead and click Edit Details.

ZyXEL Prestige623
ZyXEL Prestige623.

Step 4

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:

Don't forget to sign up for NordVPN's promo deal before it's gone.

NordVPN is the fastest VPN deal!

You might notice that most of our site doesn't have ads on it. This is because we use partnerships with companies like NordVPN to keep the site running. Thank you for supporting us by using our referral links.

If you are forwarding a range of ports separated by a hyphen then enter the lowest number of that range into the Start Port No. box and the highest number of that range into the End Port No. box. If you are only forwarding a single port number then enter that number into both the Start Port No. and the End Port No. boxes.

Enter the IP address of the device that you want to forward ports to into the IP Address box. This can be either the IP address of your computer or the IP address of another device on your network.

When you're finished, click Save near the bottom of the screen to save your changes.

Test if Your Ports are Open

Now that you have forwarded ports on the ZyXEL Prestige623 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.

More From Portforward