Port Forwarding the ZyXEL P-661HW-D1 Router for Defender SN502-4CH-002

What is Port Forwarding?

If you don't know what Port Forwarding is yet, you might want to start by reading our What is Port Forwarding guide.

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Home > Routers > ZyXEL > P-661HW-D1 > Defender SN502-4CH-002

Before Forwarding a Port Setup a Static IP Address

To setup port forwarding on the ZyXEL P-661HW-D1 router your device needs to have a static IP address. You should complete one of the following steps first:

Now that you have setup a Static IP Address on your device, please enter the IP address that you assigned to your device here:

Don't Skip This Step!

Login to the ZyXEL P-661HW-D1 Router

Now we need to know your routers IP address. You can find it a variety of ways.

How To Find Your ZyXEL P-661HW-D1 Router IP Address

It's ok if you don't know your ZyXEL P-661HW-D1 router's internal IP address. You can find it by doing one of the following:

Login To The ZyXEL P-661HW-D1 Router Using Your Web Browser

Open a web browser like Internet Explorer or Firefox. Enter the internal IP address of your router in the address bar of your browser.

ZyXEL P-661HW-D1 Screenshot 0

In the picture above the address bar has http://www.google.com in it. Just replace all of that with the internal IP address of your ZyXEL P-661HW-D1 router. By default the IP address should be set to

ZyXEL P-661HW-D1 Screenshot 1

You should see a box prompting you for your username and password. Enter your username and password now.

The Default ZyXEL P-661HW-D1 Router Username is: user

The Default ZyXEL P-661HW-D1 Router Password is: 1234

Click the Ok button to log in to your ZyXEL P-661HW-D1 router.

Default Usernames and Passwords for other ZyXEL Routers

Please visit our Default ZyXEL Router Passwords page if the username and password shown below did not work for you.

If you can't login to your router because you forgot your ZyXEL P-661HW-D1 router username and password, use our How to Reset a Router Password guide to set your ZyXEL P-661HW-D1 router back to its factory settings.

How to Port Forward Defender SN502-4CH-002 on the ZyXEL P-661HW-D1

Having trouble forwarding ports on the ZyXEL P-661HW-D1?

If you are having trouble with this guide, then perhaps PFConfig may be your solution. PFConfig is a software tool that will automatically forward ports for your router to save you time and hassle.

ZyXEL P-661HW-D1 Router Port Forwarding Screenshots

Now that you are logged in to your ZyXEL P-661HW-D1 router you should see the following:

ZyXEL P-661HW-D1 Screenshot 2

Click the Network link near the left of the page.

You should now see a new menu. In this new menu, click NAT.

ZyXEL P-661HW-D1 Screenshot 3

Click the Port Forwarding button near the top of the page.

ZyXEL P-661HW-D1 Screenshot 4

Select User define from the Service Name drop down box.

ZyXEL P-661HW-D1 Screenshot 5

Forward Ports 80 on the ZyXEL P-661HW-D1

We will list a series of lines here that will show you exactly how to forward the ports you need to forward. Defender SN502-4CH-002 requires you to forward the 80,9000 ports. Go ahead and enter the settings shown above into the Rule Setup menu and then click Apply.

Rule Setup
Service Name
Start Port
End Port
Server IP Address

Forward Ports 9000 on the ZyXEL P-661HW-D1

You should see another page of settings that need to be entered into one of the blank lines on your routers Rule Setup page. Go ahead and enter those settings and then click Apply.

Rule Setup
Service Name
Start Port
End Port
Server IP Address

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

And that's it! You're done!

Test if Your Ports are Open

Now that you have forwarded ports for Defender SN502-4CH-002 on the ZyXEL P-661HW-D1 you should test to see if your ports are forwarded correctly.

To test if your port has been properly forwarded, you can use our Open Port Check tool. Our Open Port Check tool is the only online port checking tool with Guaranteed Results.

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