LevelOne WBR-6012 - Manual (Page 50)

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2.4.3.2 Domain filters
Domain Filter
Let you prevent users under this device from accessing specific URLs.
Domain Filter Enable
Check if you want to enable Domain Filter.
Log DNS Query
Check if you want to log the action when someone accesses the specific URLs.
Privilege IP Addresses Range
Setting a group of hosts and privilege these hosts to access network without restriction.