ZyXEL Communications Prestige 642M series Guía de usuario descargar pdf (Pagina 6)

Prestige 642 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 to allow passage of a data packet and/or to make a call. There

are two types of filter applications: data filtering and call filtering. Filters are subdivided into device and

protocol filters, which are discussed later.

Data filtering screens the data to determine if the packet should be allowed to pass. Data filters are divided

into incoming and outgoing filters, depending on the direction of the packet relative to a port. 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

Filtering

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 MatchMatch

match

Call Filtering

1 2 3 4 5 6 7 8 9 10 11 ... 154 155

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