Cisco Cisco Content Security Management Appliance M690 ユーザーガイド
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AsyncOS 8.1 for Cisco Content Security Management User Guide
Chapter 5 Using Centralized Web Reporting and Tracking
Web Reputation Filters use statistically significant data to assess the reliability of Internet domains and
score the reputation of URLs. Data such as how long a specific domain has been registered, or where a
web site is hosted, or whether a web server is using a dynamic IP address is used to judge the
trustworthiness of a given URL.
score the reputation of URLs. Data such as how long a specific domain has been registered, or where a
web site is hosted, or whether a web server is using a dynamic IP address is used to judge the
trustworthiness of a given URL.
The web reputation calculation associates a URL with network parameters to determine the probability
that malware exists. The aggregate probability that malware exists is then mapped to a Web Reputation
Score between -10 and +10, with +10 being the least likely to contain malware.
that malware exists. The aggregate probability that malware exists is then mapped to a Web Reputation
Score between -10 and +10, with +10 being the least likely to contain malware.
Example parameters include the following:
•
URL categorization data
•
Presence of downloadable code
•
Presence of long, obfuscated End-User License Agreements (EULAs)
•
Global volume and changes in volume
•
Network owner information
•
History of a URL
•
Age of a URL
•
Presence on any block lists
•
Presence on any allow lists
•
URL typos of popular domains
•
Domain registrar information
•
IP address information
For more information on Web Reputation Filtering, see ‘Web Reputation Filters’ in Cisco IronPort
AsyncOS for Web Security User Guide.
AsyncOS for Web Security User Guide.