Last night there was a short power outage. The IPFire appliance sits behind a UPS.
I have accessed the appliance through the serial port. The boot appears to complete without an issue. I can login as root. However, within a very short period the system reboots.
Does anyone have any idea where I should start looking?
Then your best bet is to boot your IPFire with a rescue usb/cd and then you can mount the IPFire partitions to some temporary mount points from your rescue usb and then look through the messages file that @bbitsch mentioned to see what messages are there.
I managed to tail the file. It appears that watchdog is causing the problem. It is reporting the network is unreachable. I had my ISP (Optimum) switch the fiber modem to bridge mode.
I have looked at the /var/ipfire/ethernet/settings file and it looks as if the RED values are incorrect.
If it is the ‘old’ mini appliance, you could save the output on the serial console. I suppose you use a terminal program, not a real terminal.
To get really all output, the baudrate of the BIOS must match the baudrate of IPFire.