ZyXEL Communications GS2210 Series - What Could Go Wrong

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1.10.3 What could go wrong?
1 The IP address is setting up repeatedly, but the setting is
different. The logic rule of whitelist is OR.
For example, if we set the range of the IP addresses shown
below. 192.168.10.120 is repeatedly set up accidently. The
result is that all types of services are ALLOWED for
192.168.10.120.
2 If the administrator has forgotten or lost track of the whitelisted
IP addresses, the administrator will not be able to access the
Switch. To solve this problem, use Console to verify the settings.
Administrators can find out which IP addresses are allowed to
access the Switch by reviewing the running configurations.
Note:
If the Switch does not support Console, please check the manual of your
Switch model to find out how to restore device to factory default settings.