Default Password for ZyXEL ZyWALL USG 20 Router

To get access to ZyXEL ZyWALL USG 20 router, you need the login IP address of your router, the username, and password.

You can find these information in ZyXEL ZyWALL USG 20 router manual. But if you do not want to read the whole manual to find the default login information, then you can use the quick guide below.

Login to the ZyXEL ZyWALL USG 20 Router

The ZyXEL ZyWALL USG 20 has a web interface for configuration. You can use any web browser to log in to the ZyXEL ZyWALL USG 20 router.

Put the Login IP Address of your ZyXEL ZyWALL USG 20 in the Address Bar of your web browser. Then press the Enter key on your keyboard. You should see a dialog box pop up asking you for your ZyXEL ZyWALL USG 20 login username & password.

Default login data for ZyXEL ZyWALL USG 20

You need to know the username and password to log in to your ZyXEL ZyWALL USG 20 router. We listed below.

Model Ip Username & Password
ZyXEL ZyWALL USG 20 Username:admin/ Password:1234

Note: If you are using the default settings you should change them to increase security and prevent unauthorized access to your network.

Other ZyXEL ZyWALL USG 20 Login Problems

If you can not get a login to your router, here are a few possible solutions you can try.

The Password of ZyXEL ZyWALL USG 20 Doesn’t Work

It would help if you tried the other same brands’ passwords.

Perhaps your router’s default password is differs from what we have listed here.

Some Brands will set a different Complex password that is difficult to remember, and then printed on the label of the router.

What if forgot password to ZyXEL ZyWALL USG 20 router?

If your Internet Service Provider supplied you with your router then you might want to try giving them a call, and see if they either know what your router’s login data are, or maybe they can reset it for you.

How to Reset the ZyXEL ZyWALL USG 20 Router To Default Settings?

If you still can not access the router’s setup page, then you have to reset your router to its default settings.

To do this, press and hold the Reset button for 10 seconds. It may be an aperture or a button and will be clearly marked.

Change ZyXEL ZyWALL USG 20 Default Wifi Name (SSID)

By default, some ZyXEL ZyWALL USG 20 routers have network names (with the manufacturer name). We recommend using a different name because a default name unnecessarily identifies your router’s brand, which makes it easier for hackers.

Configure Wireless MAC address filter for ZyXEL ZyWALL USG 20

MAC filtering allows you to restrict access to your ZyXEL ZyWALL USG 20 router. To enable this feature, enter the 12 digit MAC ID of each computer connected to your network into your ZyXEL ZyWALL USG 20 router. Be sure to update this information when removing devices.

How to configure:

  1. Open the web browser and type the on the address.
  2. Enter the username and password for ZyXEL ZyWALL USG 20 router.
  3. Go to the MAC List page, you can find the MAC address of all the devices which are connected to the router.
  4. Go to Wireless->Wireless MAC Filtering page, click the Add New button.
  5. Type in the MAC address you want to allow or deny to access the router, and give a description for this item.
  6. The status should be Enabled and at last, click the Save button.


  1. While I searched all over the world for the default password of this damn router, I find it here.

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