Security Services
Configuring Web Reputation Filtering
Cisco ISA500 Series Integrated Security Appliances Administration Guide 326
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You can create a “white list” of trusted sites by adding up to 256 Allowed Web
Sites. The specified websites will not be examined by Web Reputation Filtering.
STEP 1 Click Security Services > Web Reputation Filtering.
STEP 2 Click On to enable Web Reputation Filtering, or click Off to disable it.
STEP 3 Specify the block sensitivity as Low, Medium, or High, or as a numerical threshold
(Custom). The threshold values for Low, Medium, or High are predefined and
cannot be edited.
•Low: Blocks fewer web threats. The threshold value is -6.
•Medium: Blocks more web threats. The threshold value is 5.
•High: Blocks most web threats. The threshold value is -4.
•Custom: Manually set the web reputation threshold. After selecting this
option, choose a threshold value from -10 to -0.5.
Note: The rate of false positives increases as the threshold approaches 0.
STEP 4 In the Allowed Web Sites area, you can specify the website exceptions against
your Web Reputation Filtering settings. The specified websites will not be
examined by Web Reputation Filtering. You can include up to 16 websites on this
list.
• To add a website exception, enter the following information:
-Matching Domain: Allows you to permit the HTTP access of a website
that fully matches a specific domain name. If you choose this option, enter
the domain name, not including http://, in the Site URL field and then click
Add.
-Containing Keyword: Allows you to permit the HTTP access of a
website that contains a specific keyword. If you choose this option, enter
the URL keyword, not including http://, in the Site URL field and then click
Add.
• To remove a website exception, select it from the list of Allowed Sites and
click Remove.