ZyXEL Communications Prestige 128L, User Manual

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Filter Configuration 67
9
Filter Configuration
About Filtering
Your Prestige uses filters to decide whether or not to allow passage of a
data packet and/or to make a call over the ISDN line. There are two
types of filters involved: incoming data filters and outgoing data filters.
Data filters screen the data to determine if the packet should be allowed
to pass.
Figure 9-1 Outgoing packet filtering Process
For incoming packets, your Prestige applies data filters only. Packets
are processed depending upon whether a match is made. Your Prestige
allows you to customize the filter sets that you wish to use. The
following sections describe how to configure your Prestige filter sets.