ZyXEL Communications Prestige 310 - Manual (Page 79)

Prestige 310 Broadband Sharing Gateway
Filters 7-1
Chapter 7:
Filter Configuration
This chapter shows you how to create and apply filter(s).
7.1 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 PPTP or PPPoE
encapsulation (see Figure 5-8). Outgoing packets must undergo data filtering before they encounter call
filtering as shown in the following figure.
Figure 7-1 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.
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 Match Match
No
match
No
match
No
match
Call Filtering