SonicWALL TELE3 SP, Руководство администратора

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Page 36 SonicWALL TELE3 SP Administrator’s Guide
Configuring SonicWALL Content Filtering
The Configure tab is common between the three types of Content Filtering. Click Filter on
the left side of the browser window, and then click on the Configure tab.
Select the type of Content Filter from the Content Filter Type menu. To enforce Content
Filtering on the LAN, select Apply Content Filter .
Restrict Web Features
Select any of the following applications to block:
Block:
• ActiveX
ActiveX is a programming language that embeds scripts in Web pages. Malicious
programmers can use ActiveX to delete files or compromise security. Select the
ActiveX
check box to block ActiveX controls.
• Java
Java is used to download and run small programs, called applets, on Web sites. It is safer
than ActiveX since it has built-in security mechanisms. Select the
Java check box to block
Java applets from the network.
• Cookies
Cookies are used by Web servers to track Web usage and remember user identity. Cookies
can also compromise users' privacy by tracking Web activities. Select the
Cookies check box
to disable Cookies.
• Known Fraudulent Certificates
Digital certificates help verify that Web content and files originated from an authorized party.
Enabling this feature protects users on the LAN from downloading malicious programs
warranted by these fraudulent certificates. If digital certificates are proven fraudulent, then
the SonicWALL blocks the Web content and the files that use these fraudulent certificates.
Known fraudulent certificates blocked by SonicWALL include two certificates issued on
January 29 and 30, 2001 by VeriSign to an impostor masquerading as a Microsoft employee.
• Access to HTTP Proxy Servers
When a proxy server is located on the WAN, LAN users can circumvent content filtering by
pointing their computer to the proxy server. Check this box to prevent LAN users from
accessing proxy servers on the WAN.
• Don’t Block Java/ActiveX/Cookies to Trusted Domains
Select this option if you have trusted domains using Java, ActiveX, and Cookies. To add a
trusted domain, enter the domain name into the
Add Trusted Domain field. Click Update
to add the domain to the list of trusted domains. To delete a domain, select it from the list,
and then click
Delete .