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Registered Domain

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Registered Domain

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The registered_domain processor reads a field containing a hostname and then writes the "registered domain" contained in the hostname to the target field. For example, given www.google.co.uk the processor would output google.co.uk. In other words the "registered domain" is the effective top-level domain (co.uk) plus one level (google). Optionally, it can store the rest of the domain, the subdomain into another target field.

This processor uses the Mozilla Public Suffix list to determine the value.

processors:
  - registered_domain:
      field: dns.question.name
      target_field: dns.question.registered_domain
      target_etld_field: dns.question.top_level_domain
      target_subdomain_field: dns.question.sudomain
      ignore_missing: true
      ignore_failure: true

The registered_domain processor has the following configuration settings:

Table 3. Registered Domain options

Name	Required	Default	Description
`field`	yes		Source field containing a fully qualified domain name (FQDN).
`target_field`	yes		Target field for the registered domain value.
`target_etld_field`	no		Target field for the effective top-level domain value.
`target_subdomain_field`	no		Target subdomain field for the subdomain value.
`ignore_missing`	no	false	Ignore errors when the source field is missing.
`ignore_failure`	no	false	Ignore all errors produced by the processor.
`id`	no		An identifier for this processor instance. Useful for debugging.

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