Watchguard Firebox X1000 User Manual page 164

Chapter 9: Configuring Proxied Services
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To create a new MIME type, click New Type. Enter the
MIME type and description. Click OK.
The new type appears at the bottom of the Content Types drop-
down list. Repeat this process for each content type. For a list of
MIME content types, see the Reference Guide.
You can use wildcard characters as follows:
To allow content types
To deny file name patterns:
Denying attachments based on file name patterns
The Content Types tab includes a list of file-name patterns
denied by the Firebox if they appear in email attachments.
To add a file-name pattern to the list, enter a new pattern in
the text box to the left of the Add button. Click Add.
Note that denying a particular attachment does not auto-
matically trigger protocol anomaly detection (PAD) rules.
You must specifically add the content type to the PAD
rules, as described in "Configuring the Incoming SMTP
Proxy" on page 138.
Specifying a deny message
In the Content Types tab, you can enter a message to be
shown when a content type is denied–this message is
shown to the recipient only and not the sender. A default
message is provided. Use the variable %t to add the con-
tent type to the message. Use the variable %f to add the file
name pattern to the message.
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An asterisk (*) matches any string, including an
empty string.
An asterisk (*) matches any string, including an
empty string.
A question mark (?) matches any single character.
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