ZyXEL Communications P-1100 - Manual (Page 73)

Prestige 1100 Internet Access Router
Filter Configuration 8-1
Chapter 8:
Filter Configuration
8.1 About Filtering
Your Prestige uses filters to decide whether or not to allow passage of a packet. Data filtering is divided into
incoming and outgoing filters, depending on the direction of the packet relative to a port.
The following sections describe how to configure filter sets. Please see our application notes for more
information and examples on creating and configuring filters.
8.2 The Filter Structure of the Prestige
A filter set consists of one or more filter rules. Usually, you would group related rules, e.g., all the rules for
NetBIOS, into a single set and give it a descriptive name. The Prestige allows you to configure up to
twelve filter sets with six rules in each set, for a total of 72 filter rules in the system.
You can apply up to four filter sets to a particular port to block multiple types of packets. With each filter
set having up to six rules, you can have a maximum of 24 rules active for a single port.
The following diagram illustrates the logic flow when executing a filter rule.