Netgear STM300 ProSecure Web and Email Threat Management Appliance Reference Manual

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Configuring Web Content Filtering

If you want to restrict internal LAN users from access to certain types of information and 
objects on the Internet, use the STM’s content filtering and Web objects filtering. With the 
exception of the Web content categories that are mentioned in 

 

You can specify a 

message such as “Blocked by NETGEAR” that is displayed onscreen if a user attempts to 
access a blocked site (see the Notification Settings section that is described at the bottom of 

File extension blocking. You can block files based on their extension. Such files can 

include executable files, audio and video files, and compressed files.

Web object blocking. You can block the following Web objects: embedded objects 

(ActiveX, Java, Flash), proxies, and cookies; and you can disable Java scripts. However, 
websites that are on the whitelist (see 

never subject to Web object blocking.

Web category blocking. You can block entire Web categories because their content is 

unwanted, offensive, or not relevant, or simply to reduce traffic.

You can bypass any type of Web blocking for trusted domains by 

adding the exact matching domain names to the trusted host list 
(see 

on the trusted host list is allowed for PCs in the groups for which file 
extension, object, or category blocking, or a combination of these 
types of Web blocking has been enabled.

You can bypass any type of Web blocking for trusted URLs by 

adding the URLs to the whitelist (see 

on page 116). Access to the URLs on the whitelist is allowed for PCs 
in the groups for which file extension, object, or category blocking, or 
a combination of these types of Web blocking has been enabled.

 You can customize this text. Make sure that you keep the %VIRUSINFO% metaword in the text to 

enable the STM to insert the correct malware threat information. In addition to the %VIRUSINFO% 
metaword, you can insert the following metawords in your customized message: %TIME%, 
%PROTOCOL%, %FROM%, %TO%, %SUBJECT%, %FILENAME%, %ACTION%, %VIRUSNAME%.

The text is displayed on the Malware Scan screen with HTML tags. Click Preview to open a screen that 
displays the notification text in HTML format.