Ensure that the device is running Junos OS Release 21.4 or later.
A content filtering policy enable you to filter content and manage the traffic on devices
based on the file extension and traffic direction.
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Go to SRX > Security Subscriptions >
Content Security > Content Filtering Policies
(New).
The Content Filtering Policy (New) page is
displayed.
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Click the + icon above the table.
The Create Content Filtering Policy page is
displayed.
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Enter a unique policy name with alphanumeric characters, dashes, or underscores. The
name must be within 255 characters and must not contain spaces.
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Enter a policy description within 255 characters.
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Click OK.
The policy is created and displayed on the Content Filtering Policy
(New) page.