DNS-01 challenge

As explained in Software Security for Developers

A DNS challenge is a domain-control verification method that requires publishing specified data in the domain's DNS records.

How Software Security for Developers covers it

How deep it goes

Explains the high-level challenge, DNS update, CA check, and issuance flow without detailing DNS mechanics.

Examples

Uses a certificate request for example.com and a specified DNS TXT record as the concrete validation example.

What it assumes

Assumes a CSR, a requested domain, and access to that domain's DNS settings.

What you can do after

Apply DNS-01 by updating the requested DNS records so the CA can confirm domain control and issue a certificate.

How it connects

Connects domain validation with CSRs, certificate authorities, DNS TXT records, HTTP-01 challenges, and email validation.

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Related concepts

• ACMEused by · ACME is an Internet protocol for automating certificate issuance, domain-control validation, and renewal.
• domain validationkind of · Domain validation is a certificate-issuance process in which a certificate authority verifies that the requester controls the domain named in the certificate request.
• domain ownershipmeasures · Domain ownership is the assignment of responsibility for a business domain’s data, including its meaning, structure, quality, documentation, and governance, to the domain that produces it.
• HTTP-01 challengealternative to · An HTTP-01 challenge is an ACME domain-validation method that verifies control of a domain by retrieving a challenge file from a specified HTTP URL.

This explainer was generated by Manning's knowledge graph from the text of Software Security for Developers. The section links point to the parts of the book it draws on.