FAQ - Let's Encrypt
letsencrypt.org › docs › faqSep 28, 2022 · Let’s Encrypt is a global Certificate Authority (CA). We let people and organizations around the world obtain, renew, and manage SSL/TLS certificates. Our certificates can be used by websites to enable secure HTTPS connections. Let’s Encrypt offers Domain Validation (DV) certificates.
Challenge Types - Let's Encrypt
letsencrypt.org › docs › challenge-typesFeb 13, 2023 · Since Let’s Encrypt follows the DNS standards when looking up TXT records for DNS-01 validation, you can use CNAME records or NS records to delegate answering the challenge to other DNS zones. This can be used to delegate the _acme-challenge subdomain to a validation-specific server or zone.