ZyXEL Communications P-660HN-TxA, User Manual

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P-660HN-TxA User’s Guide
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H A P T E R
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.