ZyXEL Communications ZyWALL 1050 Release Note page 136

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The console session might display "ERROR". Please Enter atur and use Xmodem to upload
the recovery image.
Use the Xmodem feature of terminal emulation software to upload the file.
Wait for about 3.5 minutes until finishing Xmodem.
Enter atkz –f –l 192.168.1.1 and atgo
2. Restore Firmware
If "Connect a computer to port 1 and FTP to 192.168.1.1 to upload the new file" displays
on the screen, you need to recover the firmware by the following procedure.
You will use FTP to upload the firmware package. Keep the console session open in order
to see when the firmware recovery finishes.
Set your computer to use a static IP address from 192.168.1.2 ~ 192.168.1.254. No matter
how you have configured the ZyWALL's IP addresses, your computer must use a static IP
address in this range to recover the firmware.
Connect your computer to the ZyWALL's port 1 (the only port that you can use for
recovering the firmware).
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