如何仅为子域创建Let's Encrypt自签名证书？ （帖子中的错误）

Question

如何为子域创建Let's Encrypt自签名证书？

具体来说：

• sub.domain.com（需要证书并指向IP地址）
• domain.com（不指向任何内容）

关注the following instructions后，我收到以下错误：

>>> sudo -H ./letsencrypt-auto certonly --standalone -d sub.domain.com --register-unsafely-without-email
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator standalone, Installer None
Obtaining a new certificate
Performing the following challenges:
tls-sni-01 challenge for sub.domain.com
Waiting for verification...
Cleaning up challenges
Failed authorization procedure. sub.domain.com (tls-sni-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: Timeout

IMPORTANT NOTES:
 - The following errors were reported by the server:

   Domain: sub.domain.com
   Type:   connection
   Detail: Timeout

   To fix these errors, please make sure that your domain name was
   entered correctly and the DNS A/AAAA record(s) for that domain
   contain(s) the right IP address. Additionally, please check that
   your computer has a publicly routable IP address and that no
   firewalls are preventing the server from communicating with the
   client. If you're using the webroot plugin, you should also verify
   that you are serving files from the webroot path you provided.

Answer 1

您可以为子域创建Let's加密证书，而无需将domian指向任何根目录。

• 登录DNS管理并为subdomian创建NAME记录。对于NAME，您需要IP地址
  • 验证sub.domian.com可通过互联网访问。
  • 运行sub.domian.com的脚本。

https://zerossl.com/free-ssl/#crt也可用于生成证书和密钥，但是需要一些手动步骤才能创建.well-known和aceme-challenge文件夹需要在sub.domian.com / DocumentRoot中创建

Answer 2

您需要在服务器上运行命令，因为该命令会验证您是否控制了域，因此如果它不在服务器上，则无法正确验证。