Watchguard Firebox X20E, Руководство пользователя

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User Guide 123
Configuring the SMTP Proxy
types, and block specified path patterns and URLs. You can use the asterisk (*) as a wild card.
Allow only safe content types
The headers for email messages include a Content Type header to show the MIME type of the email
and of any attachments. The content type or MIME type tells the computer the types of media the mes-
sage contains. Select the check box for this feature if you want to limit the content types that you allow
through the proxy. When you select this check box, only the content types shown in the text box are
allowed. The format of a MIME type is
type/subtype . For example, if you want to allow JPEG images,
you add image/jpg . You can also use the asterisk (*) as a wildcard. To allow any image format, you add
image/* to the list.
1
To add additional content types to the default list, type the MIME type and click Add .
2
To remove a content type, select it from the list and click Remove . You cannot remove
message/* or multipart/* because the SMTP proxy cannot work without them. If you try to
remove these content types, you get an error message.
3
To add common content types to the list, select the MIME type in the Predefined content type
column and click the << button.
Deny unsafe file name patterns
If you want to deny certain file name attachments, select the Deny unsafe file name patterns check
box. This is a list of file names or types that you want the proxy to block. Use the asterisk (*) as a wild-
card. For example, if you want to block all MP3 files, type
*.mp3 . If you read about a vulnerability in a
LiveSecurity Service Alert that affects PowerPoint files and you want to deny them until you install the
patch, type
*.ppt .
1
To add file name patterns to the blocked list, enter the pattern and click Add .
2
To remove a file name pattern from the blocked list, select the pattern and click Remove .
3
Click Submit .