ZyXEL Communications P-660 series Guia do Utilizador descarregar pdf (Página 105)

P-660R-F1 Series User’s Guide 105

CHAPTER 8

Packet Filters

8.1 Overview

Your ZyXEL Device uses filters to decide whether to allow passage of traffic. This chapter discusses

how to create and apply filters.

8.1.1 What You Can Do in the Packet Filter Screen

Use the Packet Filter screens to display the filter sets and configure the rules for protocol and

generic filters.

8.1.2 What You Need to Know About the Packet Filter

Filters

Your ZyXEL Device uses filters to decide whether to allow passage of a data packet. Filters are

subdivided into generic and protocol filters. Generic filter rules act on the raw data from/to LAN and

WAN. Protocol filter rules act on IP packets.

Filter Structure

A filter set consists of one or more filter rules. The ZyXEL Device 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 generic 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.

8.2 The Packet Filter Screen

Use this screen to set up packet filters on your ZyXEL Device. Click Security > Packet Filter to

display the following screen.

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ZyXEL Communications P-660 series Guia do Utilizador Página 105