Figure 9-1. Outgoing Packet Filtering Process - ZyXEL Communications Prestige 153 User Manual

Prestige 153/153X WAN Bridge/Routers
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 made. Your Prestige allows you to customize the filter sets that you wish
to use. The following sections describe how to configure filter sets.
The Filter Structure of the Prestige
You can configure up to twelve filter sets with six rules in each set, allowing you to customize up
to 72 filter rules (12 x 6).
When implementing these filter sets, you can link up to four of the filter sets together to screen
the data packet. Therefore, with each filter set having up to six rules, you can have a maximum of
24 rules active for a single filtering application.
Chapter 9 Filter Configuration
9-2
No
Built-in
match
default
Call Filters
Match
Drop packet
if line not up
Figure 9-1. 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
Send packet
and reset
Idle Timer