Cisco ISA550 Administration Manual page 278

Security Services
Configuring Web Reputation Filtering
STEP 1
STEP 2
STEP 3
STEP 4
Cisco ISA500 Series Integrated Security Appliances Administration Guide
You can create a "white list" of trusted sites by adding up to 16 Allowed Web Sites.
The specified websites will not be examined by Web Reputation Filtering.
Click Security Services > Web Reputation Filtering.
Click On to enable Web Reputation Filtering, or click Off to disable it.
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 with lowest risk of false positives. The
threshold value is -8.
• Medium: Blocks more web threats with moderate risk of false positives. The
threshold value is -6.
• High: Blocks most web threats with increased risk of false positives. The
threshold value is -4.
• Custom: Manually set the web reputation threshold. When the Custom radio
button is selected, choose the threshold value from the drop-down list. The
available values for the threshold are integers from -10 to -1 and the value
-0.5.
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.
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