Prestige 645M-A1 ADSL Bridge
Filter Configuration
5-1
Chapter 5
Filter Configuration
This chapter shows you how to create and apply filter(s).
5.1 Filtering Overview
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.
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 Filter Structure of the Prestige
A filter set consists of one or more filter rules. Usually, you would group related rules, e.g., all the rules for
Telnet, into a single set and give it a descriptive name. The Prestige allows you to configure up to twelve
filter sets with six rules in each set, for a total of 72 filter rules in the system. You cannot mix device filter
rules and protocol filter rules within the same set.
You can apply up to four filter sets to a particular port to block multiple types of packets. With each filter
set having up to six rules, you can have a maximum of 24 rules active for a single port.
5.2 Filter Set Configuration
To configure a filter set, follow this procedure:
Step 1.
Enter 21 from the main menu to open
Menu 21 - Filter Set Configuration
.