If users get the error message showing "internal database error," please do the following steps to recover ZyWALL database.
Step 1: Prepare the console connection to ZyWALL.
Step 2: Restart the ZyWALL and control device in console mode.
Step 3: When "Press any key to enter debug mode with 3 seconds" displays, press a key to enter debug mode.
Step 4: Enter the command below to start the recovery process.
USG 100> atkz -u
Step 5: Enter the command below to restart your ZyWALL
USG 100> atgo
Step 6: You will see the message "connect a computer to port 1 and FTP to 192.168.1.1 to upload the new file" displaying on the console. Now the ZyWALL's FTP server is started at port 1 with IP address 192.168.1.1, so set your computer to use a static IP address in the same subnet and connect the computer to port 1.
Step 7: Please use any FTP client and upload the database file to the ZyWALL, the login name is "anonymous". (This file is contained in the firmware package with the extension name .db)
ftp> put db_filename.db
Keep the console session connected to ensure the default system database recovery is finished.