Symantec Security 5600 Series, Security 5400 Series,Clientless VPN 4400 Series, Administration Manual

Page: 310 / 861

309 Controlling traffic at the security gateway
Blocking inappropriate content with content filtering
Searching content categories for URL ratings
You can search for a specific site in the content categories to determine which categories it is in. All of
the categories that contain the URL are displayed.
URL lookups against the predefined content categories recognize UTF-8–encoded URLs as well as
Akamai-encoded URLs.
The security gateway lets you add the URL to a new category or remove it from an existing category.
Prerequisites
None.
To search content categories for URL ratings
1 In the SGMI, in the left pane, under Policy, click Content Filtering .
2 In the right pane, on the URL Ratings tab, in the Find URL ratings for text box, type the desired
URL.
3 Click Find .
In the Rating Modification Properties dialog box, the categories in which the URL is listed appear
in the Rating categories list.
4 To modify the content category, in the Rating Categories list, select a category, and then click
Modify .
5 In the Rating Category Selection dialog box, in the Available rating categories list, select the
category to which you want to add the URL, and then click the right-arrow >>
button.
6
In the Selected categories list, select the category from which you want to remove the URL, and
then click the left-arrow >>
button.
7 Click OK .
8 In the Rating Modification Properties dialog box, click OK .
9 Optionally, do one of the following:
■
To save your configuration now and activate later, on the toolbar, click Save .
■
To activate your configuration now, on the toolbar, click Activate .
When prompted to save your changes, click Yes .
Related information
For further information related to this topic, see the following:
■
“URL Ratings tab” on page 650
■
“Rating Modification Properties—General tab” on page 650
■
“Rating Modification Properties—Description tab” on page 650
■
“Modifying the contents of a content category” on page 312
About Dynamic Document Review (DDR)
List-based content filtering alone can be ineffective. Because of the size of the Internet and the variety
of sites, creating and maintaining lists of all sites that potentially contain objectionable material is
impossible. The robust capabilities of today’s search engines and Web robots make it easy for users to
find sites that are not contained in denied lists. The language returned by search engines in the
descriptions of sites can be objectionable even if the actual site is contained in a denied list. In addition
to checking the URL against the lists, the security gateway reviews the content of the Web site before
the information is passed to the user. Each page and header is scanned to evaluate the information in
real time against dictionaries that contain trigger words and phrases. This process is referred to as
Dynamic Document Review (DDR).