ZyXEL Communications 2WG User Manual
Page 241
ZyWALL 2WG Support Notes
All contents copyright (c) 2006 ZyXEL Communications Corporation.
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E16. How do I keep database of Content Filtering service updated?
From the current design, there is no local Content Filtering signature database stored on the ZyWALL
devices.
As a result, you don’t have to worry about the signature update of ZyWALL devices since it’s not required.
The transactions and queries between CF-enabled ZyWALL devices and our dynamic database server are
taking place dynamically and automatically in the background.
However, you may want to maintain your own URL/keyword list on device to maximize the effectiveness
of the Content Filtering service.
E17. What is BlueCoat Filter list?
BlueCoat (http://www.cerberian.com) provides Internet content filtering service through an outsourced
model to original equipment manufacturers (OEMs) and service providers. With the BlueCoat Integration
Kit, ZyXEL integrates the BlueCoat content filtering service into ZyXEL appliances, such as ZyWALL,
Prestige, ZyAir series.
E18. How many ratings does the BlueCoat database contain?
BlueCoat database contains 4.3 million ratings. The BlueCoat database contains about 4.3 million ratings.
Because BlueCoat rates sites at the domain or directory level, the database actually covers hundreds of
millions of unique web pages.
E19. How often does BlueCoat update the database?
BlueCoat continuously updates the ratings database, but BlueCoat's outsourced model does not require
customers to update a local database.
Unlike other Internet content filtering solutions, BlueCoat's outsourced solution does not require clients to
receive large database updates daily or weekly. Instead, BlueCoat customers all access the same ratings
database. When a user requests a URL not contained in the database, the BlueCoat solution uses Dynamic
Real-time Rating to assign a rating to that page. All unrated URLs are further analyzed by background
technologies and human raters.
E20. How do I locate sites to block?
BlueCoat provides category ratings for Web sites. Based on the category rating from BlueCoat, users of
ZyXEL appliances then define blocking/forwarding policy in WEB GUI.
Do humans review the web sites?