Filter
Top Products
100 Administrator’s Guide SurfControl RiskFilter - E-mail V5.2.4
P
OLICY
M
ANAGER
Global Policy
3
7 Click Submit to save these new settings.
Deleting a filtering rule
You can delete a filtering rule that is no longer needed.
To delete a filtering rule:
1Select 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.
DICTIONARY THRESHOLD FILTER
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.
How the Dictionary Threshold Filter works
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.
Figure 3 - 30 The Dictionary Threshold Filter screen