ZyXEL Communications Prestige 645R - Manual (Page 100)

Prestige 645 ADSL Internet Access Router
Filter Configuration 8-1
Chapter 8
Filter Configuration
This chapter shows you how to create and apply filter(s).
8.1 About Filtering
Your Prestige uses filters to decide whether or not to allow passage of a packet. Data filters are divided into
incoming and outgoing filters, depending on the direction of the packet relative to a port. These filters are
further subdivided into device and protocol filters, which are discussed later. Data filtering can be applied
on either the WAN side or the Ethernet side. Call filtering is used to determine if a packet should be
allowed to trigger a call. Remote node call filtering is only applicable when using PPPoE encapsulation.
Outgoing packets must undergo data filtering before they encounter call filtering as shown in the following
figure.
Figure 8-1 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.
Data
Outgoing
Packet
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 Match Match
No
match
No
match
No
match
Call Filtering