Chapter 1 Introducing the ZyWALL
ZyWALL USG 1000 User’s Guide
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" It is recommended you use the shutdown command before turning off the
ZyWALL.
When you apply configuration files or running shell scripts, the ZyWALL does not stop or
start the system processes. However, you might lose access to network resources temporarily
while the ZyWALL is applying configuration files or running shell scripts.