User`s guide

Prestige 128+ ISDN Router
11-2 Filter Configuration
Figure 11-1 Outgoing Packet Filtering Process
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.
Outgoing
Packet
Data
Filters
Drop
packet
Built-in
default
Call Filters
User-defined
Call Filters
(if applicable)
Initiate call
if line not up
Active Data
Send packet
and reset
Idle Timer
Or Or
Drop packet
if line not up
Drop packet
if line not up
Send packet
but do not reset
Idle Timer
Send packet
but do not reset
Idle Timer
Match MatchMatch
No
match
No
match
No
match
Call Filters