The Filter Structure Of The P-792H V2 - ZyXEL Communications P-792H User Manual

Chapter 32 Filter Configuration

32.1.1 The Filter Structure of the P-792H v2

A filter set consists of one or more filter rules. Usually, you would group related
rules, for example all the rules for NetBIOS, into a single set and give it a
descriptive name. The P-792H v2 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 cannot
mix device filter rules and protocol filter rules within the same set. 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.
Sets of factory default filter rules have been configured in menu 21 to prevent
NetBIOS traffic from triggering calls and to prevent incoming telnet sessions. A
summary of their filter rules is shown in the figures that follow.
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P-792H v2 User's Guide