ZyXEL Communications ZyWALL 1050 Release Note page 137

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Use an FTP client on your computer to connect to the ZyWALL. This example uses the ftp
command in the Windows command prompt. The ZyWALL's FTP server IP address for
firmware recovery is 192.168.1.1
Log in without user name (just press enter).
Set the transfer mode to binary. Use "bin" (or just "bi" in the Windows command prompt).
Transfer the firmware file from your computer to the ZyWALL (the command is "put
1.01(XL.0)C0.bin" in the Windows command prompt).
Wait for the file transfer to complete.
The console session displays "Firmware received" after the FTP file transfer is complete.
Then you need to wait while the ZyWALL recovers the firmware (this may take up to 4
minutes).
The message here might be "ZLD-current received". Actually, it is equivalent to
"Firmware received".
The console session displays "done" when the firmware recovery is complete. Then the
ZyWALL automatically restarts.
3. Check if firmware recovery process succeeds
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