ZyXEL Prestige645 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 ZyXEL Prestige 645 router.
- Navigate to the port forwarding section.
- Click the Advanced Setup link.
- Click on NAT Applications.
- Create a port forward entry.
While these steps might seem difficult at first, we will walk you through each step for your ZyXEL Prestige645 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 ZyXEL Prestige645 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 ZyXEL Prestige 645 IP Address is: 192.168.1.254
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 ZyXEL Prestige 645 Router Username is: Admin
- The Default ZyXEL Prestige 645 Router Password is: 1234
Enter your username and password, and then click the Login button to log in to your ZyXEL Prestige645 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 Prestige645 router username and password, use our How to Reset a Router Password guide to set your ZyXEL Prestige645 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 Setup link near the left of the page.
You should now see a new menu. In this new menu, click NAT Applications.
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:
You can leave Application set to Manual.
In the Port Number box put the port to forward.
Enter the IP address that you are forwarding ports to in the Server IP Address box. This is either the IP address of a computer or the IP address of another device on your network.
When you're finished, click Apply 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 Prestige645 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.
ZyXEL Prestige645 Router Screenshots
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