lnmp ssl安装是，求救老大帮忙
/bin/certbotStarting create SSL Certificate use Let's Encrypt...
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator webroot, Installer None
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for www.cnccit.com
Using the webroot path /home/wwwroot/www.cnccit.com for all unmatched domains.
Waiting for verification...
Cleaning up challenges
Failed authorization procedure. www.cnccit.com (http-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: DNS problem: SERVFAIL looking up CAA for www.cnccit.com
IMPORTANT NOTES:
- The following errors were reported by the server:
Domain: www.cnccit.com
Type: connection
Detail: DNS problem: SERVFAIL looking up CAA for www.cnccit.com
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.
Let's Encrypt SSL Certificate create failed!
说dns错误，不知道为什么哦； 解析没生效或者dns有问题
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