Administrator’s Handbook
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 restart the Gateway until your fil- ter set is complete. See “Associating a Filter Set with an Interface” 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.
WAN 
packet
input filter
LAN
packet
output filter
The Motorola Netopia® Router
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.
Type of filter | Source means | Destination means |
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Input filter | The remote network | The local network |
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Output filter | The local network | The remote network |
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To add a filter, select the Filter Set Name to which you will add a filter, and click the Edit button.
