This functionality is experimental and may be changed or removed completely in a future release. Elastic will take a best effort approach to fix any issues, but experimental features are not subject to the support SLA of official GA features.

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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).

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
    ignore_missing: true
    ignore_failure: true

The registered_domain processor has the following configuration settings:

Table 1. 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.
`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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