The latest firmware for the D-Link DSL-224 (Version 3.0.10, released November 2022) can be downloaded directly from the official D-Link FTP Server
You can download the firmware for the D-Link DSL-224 from official D-Link support channels. Because firmware is region-specific and hardware-dependent, ensure you verify your router's hardware version (located on the sticker at the bottom of the device) before installing. Download Links D-Link Global Download Center: Search for " dlink dsl224 firmware update download link
Do not use third-party sites — they may contain malicious files. Instead: The latest firmware for the D-Link DSL-224 (Version 3