Cisco Cisco Web Security Appliance S680 Guía Del Usuario
Note
When you block the Posting Text
application behavior for Facebook
Events, some actions are only
blocked after users have started the
action (instead of immediately) due
to how Facebook Events works. For
example, users can create and edit
an event, but cannot save them.
Controlling Facebook Activity
– A dialog box appears and then disappears. This typically occurs when the
user clicks a link or button that would normally bring up a dialog box. Facebook
appears at first to comply with the request by showing a dialog box, but then
the dialog box disappears. For example, this might occur when the user tries to
add guests to an event.
appears at first to comply with the request by showing a dialog box, but then
the dialog box disappears. For example, this might occur when the user tries to
add guests to an event.
– Facebook displays a generic error message. This typically occurs when the
user clicks a link that would normally cause part of the page to display new data
from the server, but the AVC engine blocks that process. Facebook determines
that something is preventing it from accomplishing the requested task, but does
not distinguish the cause. The error message can appear inline in the webpage,
or as a Facebook dialog box. For example, this might occur when the user tries
to attach a link or photo to an event or message.
from the server, but the AVC engine blocks that process. Facebook determines
that something is preventing it from accomplishing the requested task, but does
not distinguish the cause. The error message can appear inline in the webpage,
or as a Facebook dialog box. For example, this might occur when the user tries
to attach a link or photo to an event or message.
– The web browser is redirected to an appliance end-user notification page.
This typically occurs when the user clicks a link that would normally navigate to
a page in Facebook that is blocked by the AVC engine. For example, this might
occur when the user tries to publish a note or delete a photo in an album.
a page in Facebook that is blocked by the AVC engine. For example, this might
occur when the user tries to publish a note or delete a photo in an album.
– The user waits indefinitely for a response from Facebook. This typically
occurs when the user clicks a link or button that would normally bring up a list
of objects that Facebook loads, but the list is never populated. For example, this
might occur when the user tries to tag a friend at a particular place.
of objects that Facebook loads, but the list is never populated. For example, this
might occur when the user tries to tag a friend at a particular place.
Rules and Guidelines
Consider the following rules and guidelines when configuring Facebook controls:
• Blocking Facebook General is the same as blocking the entire Facebook
application type.
• You can prevent users from uploading photos and videos to Facebook from the
web interface, but users can still upload photos and videos by sending emails
with attachments to their Facebook email account. To prevent users from
uploading photos and videos by email, configure your outgoing mail server,
such as the Cisco IronPort Email Security appliance, to block email sent to the
m.facebook.com domain.
with attachments to their Facebook email account. To prevent users from
uploading photos and videos by email, configure your outgoing mail server,
such as the Cisco IronPort Email Security appliance, to block email sent to the
m.facebook.com domain.
• Some third party websites, such as cnn.com and espn.com, interact with
Facebook to display or modify content in a user’s Facebook account. The AVC
engine blocks some of these sites from posting content to Facebook, but it cannot
block all sites or all updates.
engine blocks some of these sites from posting content to Facebook, but it cannot
block all sites or all updates.
• When you block Facebook Chat, users may receive chat messages, but cannot
send chat messages. Additionally, users do not see anyone else online, but others
can see them online. When your users try to reply to received chat messages,
the intended recipient never receives the message, which essentially blocks
communication.
can see them online. When your users try to reply to received chat messages,
the intended recipient never receives the message, which essentially blocks
communication.
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