Руководство Пользователя для Cisco Cisco Web Security Appliance S160

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Due to the nature of Facebook and how it hosts many of its own and third party 
applications, the AVC engine treats “Facebook” as its own application type, which 
includes both native and external Facebook applications. All Facebook applications, 
except for Facebook Videos, are grouped under the Facebook application type. 
Facebook Videos are grouped under the Media application type, enabling you to 
apply bandwidth controls.
Facebook is constantly updating and changing its native applications. Additionally, 
external Facebook applications are created and modified by third parties every 
day. Because these applications change constantly, the AVC engine updates 
its signatures to remain current with the available Facebook functionality and 
applications.
The controls that are applied to users are determined by where the user is located 
in the Facebook interface. For example, users can view photos from both Facebook 
Photos and from their Facebook walls. That means when the user is viewing another 
person’s photo in their photo album, the controls for Facebook Photos apply, 
but when the user is viewing the same photo on their own Wall, the controls for 
Facebook General apply.
Configuring Facebook Controls
Like other application types, you can block or allow the Facebook application type 
or any of the particular applications included in that type. You can also apply more 
granular controls to most native Facebook applications by configuring different 
application behaviors, such as blocking the posting of text.
You can implement more granular controls to native Facebook applications using any 
of the following application behaviors:
•  
Block File Upload. This behavior blocks files uploaded to native Facebook 
applications, such as Facebook Photos and Facebook Videos. This application 
behavior does not affect links to external videos, such as YouTube. However, 
YouTube links in Facebook are controlled by the configured YouTube AVC controls 
in the Media application type.
• Block Posting Text. This behavior prevents users from entering text in fields, such 
as comments, status updates, or Notes. Blocking this behavior for an application is 
similar to making the application read-only.
•  Block Like/Tag. This behavior blocks the ability to “like” a Facebook object, such 
as a status update or photo, by clicking the Like link. It also blocks the ability to tag 
people in Facebook objects, such as photos and videos.
• Block Installation of Third Party Applications. This behavior prevents users from 
installing external Facebook applications.
Not all application behaviors apply to all native Facebook applications.
Controlling Facebook Activity