ZyXEL Communications Prestige 645R, Руководство пользователя

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Prestige 645 ADSL Internet Access Router
8-2 Filter Configuration
The following sections describe how to configure filter sets.
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 cannot mix device filter
rules and protocol filter rules within the same set.
Six sets of factory default filter rules have been configured in menu 21 to prevent NetBIOS traffic from
triggering calls and to prevent incoming telnetting. A summary of their filter rules is shown in the figures
that follow and section
8.4 also has example.
The factory configured filters in SMT menu 21.3 are designed to block incoming telnet from the WAN
(DSL) port. Do not configure SMT menu 3.1 filter rules to block all telnet from the Ethernet. This would
block the telnet connection from your computer to the Prestige.
The following diagram illustrates the logic flow when executing a filter rule.