ZyXEL Communications PRESTIGE 100 - VERSION 2.20 User Manual page 98

Prestige 100 and 100IH ISDN Router and Router/Hub
Data
Outgoing
Filters
Packet
Match
Drop
packet
For incoming packets, your Prestige applies data filters only. Packets are processed depending
upon whether a match is found. 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 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.
8-2
No
Built-in
match
default
Call Filters
Match
Drop packet
if line not up
Figure 8-1 Outgoing Packet Filtering Process
Call Filters
No
User-defined
match
Call Filters
(if applicable)
Match
Drop packet
if line not up
Or
Send packet
but do not reset
Idle Timer
Active Data
No
match
Initiate call
if line not up
Or
Send packet
but do not reset
Idle Timer
Filter Configuration
Send packet
and reset
Idle Timer