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

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Creating Web or Secure Web Application Defenses<br />

6-16 Configuring Application Defenses<br />

2. In the MIME Subtype drop-down list, select a subtype for the MIME type<br />

that you selected in the previous step (the available options will vary<br />

depending on the MIME type you selected in the previous step). If you<br />

select the asterisk (*) option, the filter rule will ignore this field when<br />

determining a match.<br />

3. In the File Extensions area, specify the type <strong>of</strong> file extensions that you<br />

want to filter:<br />

Ignore Extensions (*)—Select this option to ignore extensions<br />

when determining a match.<br />

Archive Extensions—Select this option to specify basic archive<br />

extensions (such as .tar, .zip, etc.) for the specified MIME types/subtype.<br />

Standard Extensions—Select this option to specify the standard<br />

file extensions associated with the selected MIME type/subtype.<br />

For example, if you select text in the MIME Type field, and HTML in<br />

the MIME Subtype field, the .htm and .html file extensions will<br />

appear in the standard list.<br />

Custom—Select this option to create a custom list <strong>of</strong> file<br />

extensions for the selected MIME type/subtype. To add a file<br />

extension to the list, click New and see “Configuring the Add New<br />

File Extension window” on page 6-17. To delete a file extension,<br />

select the extension you want to delete and click Delete. You can<br />

use the Reset button to clear all extensions from the list, or to<br />

select a different file extension list (Archive or Standard).<br />

4. In the Action area, select one <strong>of</strong> the following options:<br />

Allow—Select this option if you want to explicitly allow the file<br />

extensions that you specified in the previous steps. (Virus scanning<br />

will not be performed.)<br />

Deny—Select this option if you want to explicitly deny the file<br />

extensions that you specified in the previous steps. (Virus scanning<br />

will not be performed.)<br />

Virus Scan—Select this option if you want to perform virus<br />

scanning on the file extensions that you specified in the previous<br />

steps. The type <strong>of</strong> scanning that is performed will be determined<br />

by the option(s) configured in the Type <strong>of</strong> Scanning area. If no<br />

viruses are detected, the file will be allowed through the system.

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