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Chapter 1 Introducing the ZyWALL
ZyWALL USG 1000 User’s Guide
37
Always use Maintenance > Shutdown > Shutdown or the shutdown
command before you turn off the ZyWALL or remove the power. Not
doing so can cause the firmware to become corrupt.
The ZyWALL does not stop or start the system processes when you apply
configuration files or run shell scripts although you may temporarily lose access to
network resources.
Table 3 Starting and Stopping the ZyWALL
METHOD DESCRIPTION
Turning on the
power
A cold start occurs when you turn on the power to the ZyWALL. The
ZyWALL powers up, checks the hardware, and starts the system
processes.
Rebooting the
ZyWALL
A warm start (without powering down and powering up again)
occurs when you use the Reboot button in the Reboot screen or
when you use the reboot command. The ZyWALL writes all cached
data to the local storage, stops the system processes, and then does
a warm start.
Using the RESET
button
If you press the RESET button, the ZyWALL sets the configuration
to its default values and then reboots.
Clicking
Maintenance >
Shutdown >
Shutdown or
using the shutdown
command
Clicking Maintenance > Shutdown > Shutdown or using the
shutdown command writes all cached data to the local storage and
stops the system processes. Wait for the device to shut down and
then manually turn off or remove the power. It does not turn off the
power.
Disconnecting the
power
Power off occurs when you turn off the power to the ZyWALL. The
ZyWALL simply turns off. It does not stop the system processes or
write cached data to local storage.