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website/content/en/docs/reference/command-line-tools-reference/feature-gates/RelaxedDNSSearchValidation.md

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title content_type _build stages
RelaxedDNSSearchValidation feature_gate
list render
never false
stage defaultValue fromVersion
alpha false 1.32

Relax the server side validation for the DNS search string (.spec.dnsConfig.searches) for containers. For example, with this gate enabled, it is okay to include the _ character in the DNS name search string.