Packet Filter; Chapter 11 Packet Filter; Overview; What You Can Do In The Packet Filter Screen - ZyXEL Communications P-660HN User Manual

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H A P T E R

11.1 Overview

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

11.1.1 What You Can Do in the Packet Filter Screen

Use the Packet Filter screens
configure the rules for protocol and generic filters.

11.1.2 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.
Finding Out More
See Section 11.3 on page 183

11.2 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.
P-660HN-Fx User's Guide

Packet Filter

(Section 11.2 on page 177) to display the filter sets and
for technical background information on packet filters.
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