Cisco Cisco Email Security Appliance C650 Guía Del Usuario
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Cisco AsyncOS 9.0 for Email User Guide
Chapter 9 Using Message Filters to Enforce Email Policies
Configuring Scan Behavior
c.
Click Submit.
Step 4
Click Commit Changes.
Related Topics
•
Modifying Scan Parameters using CLI
You can use the
scanconfig
command to configure the behavior of body and attachment scanning. In
the following example, the
scanconfig
command sets the following parameters:
•
MIME types of
video/*
,
audio/*
,
image/*
are not scanned for content.
•
Nested (recursive) archive attachments up to 50 levels are scanned.
•
The maximum size for attachments to be scanned is 25 megabytes; anything larger will be skipped.
(The default is 5 megabytes.)
(The default is 5 megabytes.)
•
The attachment is enabled for metadata scanning. When the scanning engine scans attachments, it
scans the metadata for the regular expression. This is the default setting.
scans the metadata for the regular expression. This is the default setting.
•
The attachment timeout scanning is configured for 60 seconds. The default is 30 seconds.
•
Attachments that were not scanned are assumed to not match the search pattern. (This is the default
behavior.)
behavior.)
•
The
application/(x-)pkcs7-mime
(opaque-signed) parts of a message are converted to
multipart/signed
(clear-signed) to provide the message’s content for processing. The default is not
to convert opaque-signed messages.
Note
When setting the
assume the attachment matches the search pattern
to Y, messages that cannot be
scanned will cause the message filter rule to evaluate to true. This could result in unexpected behavior,
such as the quarantining of messages that do not match a dictionary, but were quarantined because their
content could not be correctly scanned.
such as the quarantining of messages that do not match a dictionary, but were quarantined because their
content could not be correctly scanned.
Bypass all filters in case of a content
or message filter error
or message filter error
Specify whether to bypass all filters in case of a
content or message filter error.
content or message filter error.
Encoding to use when none is
specified
specified
Specify the encoding to be used if no encoding is
specified.
specified.
Convert opaque-signed messages to
clear-signed (S/MIME unpacking)
clear-signed (S/MIME unpacking)
Specify whether to convert opaque-signed
messages to clear-signed (S/MIME unpacking).
messages to clear-signed (S/MIME unpacking).
Table 9-11
Field
Description
mail3.example.com> scanconfig
There are currently 5 attachment type mappings configured to be SKIPPED.