Always check the official portal for newer builds. If you’re running version 1.02 or earlier, – those have known remote access vulnerabilities.

Install firmware

To update your D-Link DSL-124 router, the best and most secure download link depends on your specific Hardware Revision

You must use a wired Ethernet connection. Attempting an update over Wi-Fi can result in a permanent device failure if the wireless signal drops during the flash.

It is strongly advised to Back up your current settings before proceeding, as updates typically reset the router to factory defaults.