1. Letsencrypt/FAQ

について、ここに記述してください。

Contents

  1. Letsencrypt/FAQ
  2. cert bot challenges
  3. DNS-01 challenge
  4. http-01 challenge
  5. Wildcard issuance

FAQ: https://letsencrypt.org/docs/faq/

Letsencrypt/証明書/複数ドメイン対応

https://community.letsencrypt.org/t/two-unrelated-domains-on-one-server/1696

Two unrelated domains on one server

2. cert bot challenges

http://letsencrypt.readthedocs.io/en/latest/challenges.html 

    Posting a specified file in a specified location on a web site (the HTTP-01 challenge)
    Offering a specified temporary certificate on a web site (the TLS-SNI-01 challenge)
    Posting a specified DNS record in the domain name system (the DNS-01 challenge)

3. DNS-01 challenge

https://community.letsencrypt.org/t/how-to-use-dns-01-challenge/28593

4. http-01 challenge

https://community.letsencrypt.org/t/whats-the-file-that-http-01-challenge-requires-at-challenge/42342

5. Wildcard issuance

Does Let’s Encrypt issue wildcard certificates?

Yes. Wildcard issuance must be done via ACMEv2 using the DNS-01 challenge.
 See this post for more technical information.

https://community.letsencrypt.org/t/acme-v2-production-environment-wildcards/55578