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> Chapter 25 - Security Profiles > Data leak prevention > DLP archiving

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DLP archiving

DLP is typically used to prevent sensitive information from getting out of your company network, but it can also be used to record network use. This is called DLP archiving. The DLP engine examines email, FTP, NNTP, and web traffic. Enabling archiving for rules when you add them to sensors directs the FortiGate unit to record all occurrences of these traffic types when they are detected by the sensor.

Since the archive setting is configured for each rule in a sensor, you can have a single sensor that archives only the things you want.

You can archive Email, FTP, HTTP, and session control content:

  • Email content includes IMAP, POP3, and SMTP sessions. Email content can also include email messages tagged as spam by Email filtering. If your unit supports SSL content scanning and inspection, email content can also include IMAPS, POP3S, and SMTPS sessions.
  • HTTP content includes HTTP sessions. If your unit supports SSL content scanning and inspection HTTP content can also include HTTPS sessions.

DLP archiving comes in two forms: Summary and Full.

Summary archiving records information about the supported traffic types. For example, when an email message is detected, the sender, recipient, message subject, and total size are recorded. When a user accesses the Web, every URL the user visits recorded. The result is a summary of all activity the sensor detected.

For more detailed records, use full archiving . When an email message is detected, the message itself, including any attachments, is archived. When a user accesses the Web, every page the user visits is archived. Far more detailed than a summary, full DLP archives require more storage space and processing.

Because both types of DLP archiving require additional resources, DLP archives are saved to a FortiAnalyzer unit or the FortiGuard Analysis and Management Service (subscription required).

You can use DLP archiving to collect and view historical logs that have been archived to a FortiAnalyzer unit or the FortiGuard Analysis and Management Service. DLP archiving is available for FortiAnalyzer when you add a FortiAnalyzer unit to the Fortinet configuration. The FortiGuard Analysis server becomes available when you subscribe to the FortiGuard Analysis and Management Service.

Two sample DLP sensors are provided with DLP archiving capabilities enabled. If you select the Content_Summary sensor in a security policy, it will save a summary DLP archive of all traffic the security policy handles. Similarly, the Content_Archive sensor will save a full DLP archive of all traffic handled the security policy you apply it to. These two sensors are configured to detect all traffic of the supported types and archive them. You can see these sensors in the GUI but the configuration is only visible through the CLI; DLP archiving is set in the CLI only.

To set the archive to Summary

config dlp sensor

edit <name of sensor>

set summary-proto smtp pop3 imap http ftp nntp msn yahoo mapi

end

To set the archive to Full

config dlp sensor

edit <name of sensor>

set full-archive-proto smtp pop3 imap http ftp nntp msn yahoo mapi

end

 

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If you set the full-archive-proto filter to include one or more of the protocols set by the protooption, then the archive action is disabled.