Billion Electric Company BiGuard 2 - Manual (Page 89)

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Enter a name for the IP Address and then enter the IP address itself. Click Apply to
save your changes. The IP address will be entered into the Exception List, and
excluded from the URL filtering rules in effect.
4.4.4.3 LAN MAC Filter
LAN Mac Filter can decide that BiGuard will serve those devices at LAN side or not by
MAC Address.
Default Rule: Forward or Drop all LAN requests. (Forward by default)
Create: You can also input a specified MAC Address to be dropped or Forward
without depending on the default rule.