Sidewinder G2 6.1.1 Administration Guide - Glossary of Technical ...

Creating Mail Application Defenses
6-26 Configuring Application Defenses
You can also define a key word entry that consists partly or entirely of
binary characters. The binary characters you want to search for are
entered into the Key Word list using their hexadecimal equivalents. Each
character must be preceded with a back slash (\). This distinguishes the
character from a regular character. You can specify several characters in
a row, but each character must be preceded by a back slash. You can
also intermingle the binary characters with regular characters. For
example, the following are valid entries in the Key Word list:
— \ac\80\fe
— \ff\00\fb\40secrets
— password\df\01\04
Valid hexadecimal characters are allowed immediately following a back
slash. To use the back slash character as part of a key word entry, you
must type a double back-slash (\\).
Note: The exception is \0a (the new line character). The filter will not detect a key
word that contains this character unless it is the first character in the key word entry
or unless the character is preceded by \0d (the line feed) character (e.g., \0d\0a).
2. If you want to require that there be white space directly in front of and/
or after a key word, select the Require whitespace immediately before
phrase and/or Require whitespace immediately after phrase check
boxes, accordingly. This prevents the filter from misidentifying character
strings that innocently appear as part of another word.
For example, if you require whitespace before and after the key word
“for,” words like “forest,” “formula,” “information,” and “uniform” will be
allowed to pass through the filter, while the word “for” would not. If you
do not require whitespace before and after the key word “for,” the “for”
string within the word would match the filter and cause the message to
be rejected (if the specified number of matches are found).
3. To add the new or modified key word, click OK.
Configuring the Mail MIME/Virus tab
To configure MIME and anti-virus filtering options for a Mail defense,
select the MIME/Virus tab. The following window appears.