Zyxel-communications P-660HN-TxA Uživatelský manuál stáhnout pdf (Strana 155)

P-660HN-TxA User’s Guide

155

CHAPTER 11

Filters

11.1 Overview

This chapter introduces three types of filters supported by the ZyXEL Device. You

can configure rules to restrict traffic by IP addresses, MAC addresses, application

types and/or URLs.

11.1.1 What You Can Do in the Filter Screens

•Use the URL Filter screen (Section 11.2 on page 156) to block access to web

sites.

•Use the Application Filter screen (Section 11.3 on page 157) to allow or deny

traffic from certain types of applications.

•Use the IP/MAC Filter screen (Section 11.4 on page 158) to create IP/MAC

filter rules.

11.1.2 What You Need to Know About Filtering

URL

The URL (Uniform Resource Locator) identifies and helps locates resources on a

network. On the Internet the URL is the web address that you type in the address

bar of your Internet browser, for example “http://www.zyxel.com”.

IP/MAC Filter Structure

An IP/MAC 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.

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Zyxel-communications P-660HN-TxA Uživatelský manuál Strana 155