Cisco Cisco Email Security Appliance X1070 ユーザーガイド
11-4
Cisco AsyncOS 8.5.5 for Email Security User Guide
Chapter 11 Content Filters
How Content Filters Work
Message Body
Contains text: Does the message body contain text that matches a specific
pattern?
pattern?
Contains smart identifier: Does content in the message body match a
smart identifier? Smart identifiers can detect the following patterns:
smart identifier? Smart identifiers can detect the following patterns:
•
Credit card numbers
•
U.S. Social Security numbers
•
CUSIP (Committee on Uniform Security Identification Procedures)
numbers
numbers
•
ABA (American Banking Association) routing numbers
Contains term in content dictionary: Does the message body contain any
of the regular expressions or terms in the content dictionary named
<dictionary name>?
of the regular expressions or terms in the content dictionary named
<dictionary name>?
For this option to be enabled, the dictionary must already have been
created. See
created. See
.
Note
The dictionary-related conditions are only available if you have
one or more dictionaries enabled. For information about creating
content dictionaries, see
one or more dictionaries enabled. For information about creating
content dictionaries, see
Number of matches required. Specify the number of matches required
for the rule to evaluate to true. You can specify this threshold for text or
smart identifiers.
for the rule to evaluate to true. You can specify this threshold for text or
smart identifiers.
This rule applies to the body of the message only. It does not include
attachments or headers.
attachments or headers.
URL Category
See
.
Message Size
Is the body size within a specified range? Body size refers to the size of the
message, including both headers and attachments. The body-size rule
selects those messages where the body size compares as directed to a
specified number.
message, including both headers and attachments. The body-size rule
selects those messages where the body size compares as directed to a
specified number.
Table 11-2
Content Filter Conditions (continued)
Condition
Description