Surf Control 5.2.4 Benutzerhandbuch

100 Administrator’s Guide

SurfControl RiskFilter - E-mail V5.2.4

7

Click Submit to save these new settings.

You can delete a filtering rule that is no longer needed. 

To delete a filtering rule:

1

Select Global Policy from the Policy Manager tab.

2

Click Filters. The Global Policy Filter list screen is displayed.

3

Click Add. The Create New Filter screen is displayed.

4

Select Content Guardian and click Next.

5

Select the check box alongside the rule that you want to delete.

6

Click Submit to save these new settings.

The Dictionary Threshold Filter uses a library of dictionaries that contain words associated with different 
aspects of unwanted content. RiskFilter is pre-configured with the following dictionaries:

Adult, Alcohol/Tobacco/Drugs, Arts/Entertainment, Computing/Internet/hacking, Confidential, Finance, 
Gambling, Hate speech/Offensive, Job search, Medical/Healthcare, Shopping, Spam, Spam Misspellings, 
Sports, Travel and Violence/Weapons.

The Dictionary Threshold filter works by assigning each word a numeric value. It then checks to see how 
many words from the selected dictionaries appear within a message and adds up the total. If this value is 
greater than the value specified in the Dictionary Threshold filter, the filter will trigger.

EXAMPLE: a Dictionary Threshold value of 150 from the Gambling dictionary is set for a rule. An e-mail 
using the words ‘baccarat’, ‘blackjack’, ‘poker’ and ‘slot machine’, arrives at the SurfControl server. The 
dictionary value of each of these words is 50, making a total of 200. This exeeds the Dictionary threshold 
value and the filter triggers.

Dictionary Thresholds are configured in the Dictionary Threshold screen.

The Dictionary Threshold Filter screen