User`s manual

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4.3.11 Security
-IP Filter
IP filter function can block LAN PCs from communicating with Internet PCs by preventing
specific IP addresses from accessing external network through router via specific a port
number or range.
1) Click “ Advanced Setup” → “ Security” → “ IP Filtering” to display the page
above and then click the “ Add” button to enter the page below to add filtering rules.
Filter Name: Enter the defined filtering name.
IP Version: Only IPv4 is provided.
Protocol: TCP/UDP; TCP; UDP; ICMP available for your option.
Source IP address [/prefix length]: Enter the LAN IP address to be filtered.
Source Port (port or port: port): The port number or range used by LAN PCs in accessing
the Internet.
Destinations IP address [/prefix length]: The external network IP address to be accessed
by LAN PC.