Cisco Systems ISA550 Manual De Usuario

Configuring Content Filtering to Control Internet Access

Cisco ISA500 Series Integrated Security Appliances Administration Guide

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Click Save to apply your settings. 

Click Firewall > Content Filtering > Advanced Settings. 

Enter the following information: 

•

Filter Traffic on HTTP Port: Enter the port number that is used for filtering 
HTTP traffic. Content Filtering only monitors and controls the website visits 
through this HTTP port. The default value is 80. 

•

Filter Traffic on HTTPS port: Enter the port number that is used for filtering 
HTTPS traffic. Web URL Filtering only monitors and controls the website 
visits through this HTTPS port. The default value is 443. 

•

Blocked Web Components: You can block web components like Proxy, 
Java, ActiveX, and Cookies. By default, all of them are permitted. 

-

Proxy: Check this box to block proxy servers, which can be used to 
circumvent certain firewall rules and thus present a potential security 
gap. 

-

Java: Check this box to block Java applets that can be downloaded from 
pages that contain them.

-

ActiveX: Check this box to prevent ActiveX applets from being 
downloaded through Internet Explorer.

-

Cookies: Check this box to block cookies, which typically contain 
sessions.

•

Action: Choose one of the following actions when a web page is blocked:

-

Display Default Blocked Page when the requested page is blocked: 
Displays the default block page if a web page is blocked. If you choose 
this option, the message that you specify in the Block Message field will 
show on the default block page. 

-

Redirect URL: Redirects to a specified web page if a web page is 
blocked. If you choose this option, enter a desired URL to be redirected. 
Make sure that specified URL is allowed by the Website Access Control 
List.