Cisco Cisco Email Security Appliance C160 Mode D'Emploi

Dictionary terms are case-sensitive and can contain non-ASCII characters. For more information on data 
loss prevention, see 

Text resources are text objects, such as disclaimers, notification templates, and anti-virus templates. You 
can create new objects for use in various components of AsyncOS. You can import and export text 
resources. 

Message disclaimer stamping allows you to add a disclaimer text resource to messages. For example, 
you could append a copyright statement, promotional message, or disclaimer to every message sent from 
within your enterprise.

AsyncOS provides two types of dictionaries: content and DLP dictionaries. For information on 
managing DLP dictionaries, see 

Content dictionaries are groups of words or entries that work in conjunction with the Body Scanning 
feature on the appliance and are available to both content and message filters. Use the dictionaries you 
define to scan messages, message headers, and message attachments for terms included in the dictionary 
in order to take appropriate action in accordance with your corporate policies. For example, you could 
create a list of confidential or profane words, and, using a filter rule to scan messages that contain words 
in the list, drop, archive, or quarantine the message.

The AsyncOS operating system includes the ability to define a total of 100 content dictionaries using the 
GUI (Mail Policies > Dictionaries) or the CLI’s 

dictionaryconfig

 command. You can create, delete, 

and view dictionaries; add and delete entries from a dictionary; and import and export entire dictionaries. 

Words in dictionaries are created with one text string per line, and entries can be in plain text or in the 
form of regular expressions. Dictionaries can also contain non-ASCII characters. Defining dictionaries 
of regular expressions can provide more flexibility in matching terms, but doing so requires you to 
understand how to delimit words properly. For a more detailed discussion of Python style regular 
expressions, consult the Python Regular Expression HOWTO, accessible from 

     

  http://www.python.org/doc/howto/

To use the special character # at the beginning of a dictionary entry, you can use a character class [#] to 
prevent it being treated as a comment.