15
Filters
15.1 Overview
This chapter introduces three types of filters supported by the
15.1.1What You Can Do in the Filter Screens
•Use the IP/MAC Filter screen (Section 15.2 on page 120) to create IP/MAC filter rules.
•Use the Application Filter screen (Section 15.3 on page 122) to allow or deny traffic from certain types of applications.
•Use the URL Filter screen (Section 15.4 on page 123) to block access to web sites.
15.1.2What You Need to Know About Filtering
IP/MAC Filter Structure
An IP/MAC filter set consists of one or more filter rules. The
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”.
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