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ACME DNS-01 — an ACME domain-control validation method that requires publishing a token-derived value in a TXT record at _acme-challenge under the identifier being validated.
The record value is published at a specific owner name in the authoritative DNS zone and cached for its TTL. Data format, coexistence with other records, and response behavior are defined by the record type and its applicable specification.
ACME DNS-01 — an ACME domain-control validation method that requires publishing a token-derived value in a TXT record at _acme-challenge under the identifier being validated.
It is placed at the required name in an authoritative zone to provide resolvers and applications with a particular type of data. The recipient interprets the record fields according to that type’s format.
Verify the owner name, type, value, TTL, and the response from every authoritative server. Observe format restrictions and distinguish a missing record from a cached old value.
