Advanced Filtering and Firewall (Screen #3)
In the third Advanced Filtering window you will define the terms or rule to be used for filtering a specific IP address. Again you can supply a name for the subset in the Comment field and click the box on the right to enable the Filter Rule.
In the Pass or Block field select the action to be performed on the IP packets, the default is Pass Immediately. Any blocked packets are simply dropped.
In the Direction field choose either In or Out from the pull down menu. Which one you choose depends on whether you are blocking IP packets from coming into the network (blocking a specific web site for example). Or alternatively you can block packets originating at a specific IP address from leaving the LAN; this will block Internet access for a specific host.
The Protocol field allows you to define the type of protocol of the packets to be blocked.
You must next specify the Source and Destination IP Addresses as well as their Subnet Mask. This will block the packets from or destined to any specified IP address from passing through the Router.
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