ZyWALL USG Series Firmware Upgrade Service Q&A

Started from the ZLD 4.20 firmware version, the firmware upgrade service was introduced to help customers to easily and safely keep the firmware of their Zyxel devices up-to-date. In this document, you will learn about the firmware upgrade service and how you would benefit from it. You will see how Zyxel keeps ZLD 4.20 and ZLD 4.25 firmware upgrade service running while the lifetime firmware upgrade service is activated by default after ZLD 4.25 patch 1.





Frequently Asked Questions

1. What is the firmware upgrade service? And how can I get it?

Firmware upgrade is a supportive service that allows you to receive notification of the latest available firmware and to quickly download via either device GUI or myZyxel. The automatic, complimentary firmware upgrade service is built into your device with firmware V4.20 or above as soon as it is registered on myZyxel.


2. Do I need to pay for the firmware upgrade service?

No, this is a complimentary service and is available once the device is registered on myZyxel.


3. What can I benefit from the firmware upgrade service?

It's always your best interest to use the latest firmware. With the latest firmware, you can enjoy new feature enhancements, bug fixes and solutions that protect your network from security vulnerabilities.


4. If firmware upgrade service expires, will my devices stop working?

No, this is a complimentary service and is available once the device is registered on myZyxel.

  • If the firmware upgrade service expires, your devices will keep working. It's suggested to download the ZLD 4.25 patch 1 to ensure the lifetime firmware upgrade service.
  • For the registered ZLD 4.20 and ZLD 4.25 devices, the firmware upgrade service will remain activated until Dec 31, 2020.
  • The ZLD 4.25 patch 1 activates lifetime firmware upgrade service by default.


5. If I register one of my devices on myZyxel., can I obtain the firmware files for all different models?

No, only the specific firmware file for the registered model can be downloaded. This is to ensure our customers receive correct firmware files. For Zyxel Partners, please contact to your local support for further assistance.


6. How to get the firmware from the global web site?

Starting from the firmware version ZLD 4.25 and above, you will not be able to download the firmware files directly from Zyxel's corporate website; the link will be redirected to the myZyxel sign-in page and you'll find matching registered devices under your account.

ZLD 4.20 firmware versions are still available for download on the Zyxel corporate website. There are the latest three versions available:


7. What if my device has ZLD 4.15 or earlier firmware?

The ZLD 4.15 does not support firmware upgrade service. To ensure specific requirements are being managed, please contact the support team before updating the firmware.


8. If I don't have a myZyxel account, can I download the firmware?
  • Firmware versions prior to ZLD 4.25 don't require a myZyxel account, and firmware files can be downloaded from the Zyxel website.
  • Firmware version ZLD 4.25 and above require users to sign up for a myZyxel account and to register devices on hand. The firmware upgrade service will help you to download the files quickly.
9. What are the benefits of the myZyxel account and product registration?

By registering a myZyxel account and your products, you will enjoy the following benefits:

  • A central service/product management portal for Zyxel commercial networking products
  • Receiving notifications for service status and updates
  • Receiving notifications for new firmware for commercial Gateways
  • Managed service providers can manage products and services for customers


How to upgrade firmware from ZLD 4.20 to ZLD 4.25

How to initial setup firmware ZLD 4.25