I have cisco modem with Linux firmware. I can't connect to modem admin interface via ip 192.168.100.1. I can't SSH to it either. I tried to ping it and it is unreachable. I noticed that sometimes this happened after I make a change to some settings and reboot. Now it has dissapeared completely.
I tried to force GUI page by setting the same subnet: static IP 192.168.100.2, subnet mask 255.255.255.0 and tried to connect, but no luck. I tried also to reset network adapter and unplug network cable several times, not help. I think modem is not bricked, as LEDs light act same as it worked before.
Bootloader is not damaged. I reflashed firmware two times via serial - the flashing went smoothly. I can view the boot process via serial access in Putty terminal window. Nevertheless, I can no connect to web interface. Something is causing the web daemon to crash or not start. Could it be a partially bricked due to the wrong settings I possibly put? Can this be NVRAM issue? Device have relatively small (8Mb) RAM. Or this is firmware problem?