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My domain is: business.wongowin.com
I ran this command: sudo letsencrypt certonly -a webroot --webroot-path=/var/validator/public -d business.wongowin.com, in public, we create the folder /.web-root/acm
It produced this output: Cleaning up challenges
Failed authorization procedure. business.wongowin.com (http-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: DNS problem: query timed out looking up A for business.wongowin.com.
The following errors were reported by the server:
My operating system is (include version): ubuntu 16.04
My web server is (include version): nginx latest version
My hosting provider, if applicable, is:
I can login to a root shell on my machine (yes or no, or I don’t know): yes
I’m using a control panel to manage my site (no, or provide the name and version of the control panel): no.
I follow a guide made by digitalOcean, also try some methods to verify this. I use a web version https://zerossl.com and certbot and in both got the same error.