DD-WRT - Wikipedia
https://en.wikipedia.org/wiki/DD-WRTDD-WRT is Linux -based firmware for wireless routers and access points. Originally designed for the Linksys WRT54G series, it now runs on a wide variety of models. DD-WRT is one of a handful of third-party firmware projects designed to replace manufacturer's original firmware with custom firmware offering additional features or functionality.
DD-WRT
https://dd-wrt.com03.02.2021 · DD-WRT is a Linux based alternative OpenSource firmware suitable for a great variety of WLAN routers and embedded systems. The main emphasis lies on providing the easiest possible handling while at the same time supporting a great number of functionalities within the framework of the respective hardware platform used. » Read More Recent News
Linksys WRT54G v3.1 - DD-WRT Wiki
https://wiki.dd-wrt.com/wiki/index.php/Linksys_WRT54G_v3.17) Once in the dd-wrt webgui go to Administration > Factory Defaults and select to restore factory defaults. 8) This will hard reset your router, which will take about 2-3 minutes to complete. 9) After it is finished you can then re-access the dd-wrt webgui at 192.168.1.1, it will again want you to set a user/pass, go ahead and do so, then begin to set settings and enjoy dd-wrt.