Motorola Netopia 3342N - Manual (Page 172)

Administrator’s Handbook
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will appear in the upper right corner of the web page. It will remain until all of your
changes are entered and validated. You need not immediately restar t the Gateway until your fil-
ter set is complete. See
“Associating a Filter Set with an Inter face” on page 176 .
Adding filters to a filter set
There are two kinds of filters you can add to a filter set: input and output. Input filters check packets
received from the Internet, destined for your network. Output filters check packets transmitted from your
network to the Internet.
Packets in Netopia Embedded Software Version 7.7.4 pass through an input filter if they originate from the WAN and
through an output filter if they’re being sent out to the WAN.
The process for adding input and output filters is exactly the same. The main difference between the two
involves their reference to source and destination. From the perspective of an input filter, your local network
is the destination of the packets it checks, and the remote network is their source. From the perspective of
an output filter, your local network is the source of the packets, and the remote network is their destination.
To add a filter, select the Filter Set Name to which you will add a filter, and click the Edit button.
Type of filter Source means Destination means
Input filter The remote network The local network
Output filter The local network The remote network
The Motorola Netopia® Router
input filter
output filter
LAN WAN
packet
packet