D-Link eventually discontinues support for older hardware. If you visit the support site and see that the latest firmware is several years old, it likely means the device has reached "End of Life."
The D-Link DSL-124 is end-of-life. No new firmware will be released. If your unit is functioning well on version 1.04, you can continue using it as a basic router. However, consider replacement if:
However, the simplicity of the DSL-124 firmware also highlights its limitations. Advanced users often find the feature set restrictive. The firmware provides standard controls, such as MAC address filtering, basic parental controls, and virtual server settings for port forwarding, yet it lacks the granular Quality of Service (QoS) controls or robust VLAN tagging features found in higher-end units. Furthermore, the web-based interface can be sluggish on older hardware revisions, a reminder that the processing power of the router is limited. The stability of the firmware has historically been a mixed bag; while standard web browsing is rarely impacted, the device can struggle under the load of multiple heavy simultaneous connections, occasionally necessitating a reboot. This underscores the reality that firmware can only optimize hardware performance up to the physical limits of the device’s RAM and CPU.