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Decode CEF

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Decode CEF

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The decode_cef processor decodes Common Event Format (CEF) messages. This processor is available in Filebeat.

Below is an example configuration that decodes the message field as CEF after renaming it to event.original. It is best to rename message to event.original because the decoded CEF data contains its own message field.

processors:
  - rename:
      fields:
        - {from: "message", to: "event.original"}
  - decode_cef:
      field: event.original

The decode_cef processor has the following configuration settings.

Table 1. Decode CEF options

Name	Required	Default	Description
`field`	no	message	Source field containing the CEF message to be parsed.
`target_field`	no	cef	Target field where the parsed CEF object will be written.
`ecs`	no	true	Generate Elastic Common Schema (ECS) fields from the CEF data. Certain CEF header and extension values will be used to populate ECS fields.
`ignore_missing`	no	false	Ignore errors when the source field is missing.
`ignore_failure`	no	false	Ignore failures when the source field does not contain a CEF message.
`id`	no		An identifier for this processor instance. Useful for debugging.

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