First, Let's Encrypt exists and is free. Second, DNS-01 uses multiperspective validation, which is fairly complex. https://letsencrypt.org/2020/02/19/multi-per

First, Let's Encrypt exists and is free. Second, DNS-01 uses multiperspective validation, which is fairly complex. https://letsencrypt.org/2020/02/19/multi-perspective-validation.html https://letsencrypt.org/2020/02/19/multi-perspective-validat...