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Advanced Setup
5.5 IP Filter/Firewall Setup
The IP Filter/Firewall function helps to prevent your local network
against attack from outside. It also provides a method of restricting
users on the local network from accessing the Internet. Additionally,
it can filter out specific packets to trigger the router to place an outgoing
connection.
5.5.1 An Overview of the Firewall
The IP Filter/Firewall includes two types of filter: Call Filter and Data
Filter. The former is designed to block or allow IP packets that will
trigger the router to establish an outgoing connection. The later is
designed to block or allow which kind of IP packets are allowed to
pass through the router when the WAN connection has been estab-
lished.
