Prestige 645 ADSL Internet Access Router

Chapter 8

Filter Configuration

This chapter shows you how to create and apply filter(s).

8.1About 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.

 

 

 

 

 

 

 

 

 

 

 

 

Call Filtering

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

Built-in

 

No

User-defined

 

No

 

Active Data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outgoing

 

 

Data

 

match

 

default

 

match

Call Filters

 

match

 

 

Initiate call

 

Packet

 

 

Filtering

 

 

 

Call Filters

 

 

 

 

(if applicable)

 

 

 

 

if line not up

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Send packet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and reset

 

 

 

 

Match

 

 

 

Match

 

 

 

 

 

Match

 

 

 

 

 

 

Idle Timer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drop

 

 

Drop packet

 

 

 

 

 

Drop packet

 

 

 

 

 

 

 

 

 

 

 

 

 

packet

 

 

if line not up

 

 

 

 

 

if line not up

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Or

 

 

 

 

 

 

Or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Send packet

 

 

 

 

 

Send packet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

but do not reset

 

 

but do not reset

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Idle Timer

 

 

 

 

 

 

Idle Timer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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.

The following sections describe how to configure filter sets.

Filter Configuration

8-1