I had this old router with DD-WRT on it, a Fonera 2100. Somehow, the DD-WRT got corrupted, but I still had access to Redboot on 192.168.1.254.
Anyway, the dd-wrt support forum is awful and the build I was using was not working correctly in client mode. Hence, I got the idea to try out Gargoyle!
So, I downloaded Fonflash and the 2 files needed for stable version 1.4.7 (Atheros 231x). I set Fonflash to openwrt/Gargoyle, hit start flash and then plugin the router to power supply. I thought that, since I had the router with problems and needed to access Redboot to recover it, I might as well do in one step - loading a proper firmware with Fonflash, which I think is also accessing the Redboot.
After connecting to power supply, Fonflash started working, but it stalled right on the beggining:
>fis init...
And never went past this point. Which I think is not normal.
After more than 40 minutes, I uplugged the router and tested it. No more access to redboot on 192.168.1.254

The only good news is that the router still receives IP via DHCP. I have it now with a dynamic IP on my LAN, but I can't connect to it in any way (SSH, telnet, http....).
Can someone point me the right way to recover it?
I think I will need to do a proper formating, maybe with "fis init -f" command, but for that I need redboot access...