How To Manage Zywall Firmware - ZyXEL Communications ZyWALL USG100-Plus User Manual

The default configuration files are:
• system-default.conf: This file contains all of the ZyWALL settings. If you apply this file, the
ZyWALL's default IP address and password will be restored.
• startup-config.conf: This is the configuration file that the ZyWALL is currently using. All the
changes you have saved/applied in the Web Configurator or in CLI commands (when you use the
write command) are applied to this file.
• lastgood.conf: This is the most recently used (valid) configuration file that was saved when the
device last restarted. If you upload and apply a configuration file with an error, you can apply
lastgood.conf to return to a valid configuration.
6.4.1 What Can Go Wrong
• You cannot upload system-default.conf or lastgood.conf.
• During boot up, the ZyWALL first applies start-up.conf. If the application is successful, it will be
copied into lastgood.conf. If the application fails, the ZyWALL will try to apply lastgood.conf.
• If lastgood.conf.fails to apply, the ZyWALL will restore by using the system-default.conf file
so that the device can boot up normally.

6.5 How to Manage ZyWALL Firmware

Click Maintenance > File Manager > Firmware Package. Use this screen to check current
firmware version and upload firmware to the ZyWALL.
ZyWALL USG100-PLUS User's Guide
Chapter 6 Maintenance
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