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My domain is: ./certbot-auto
I ran this command: ./certbot-auto
It produced this output: (tls-sni-01): urn:acme:error:tls :: The server experienced a TLS error during domain verification :: Failed to connect to 18.104.22.168:443 for TLS-SNI-01 challenge
My operating system is (include version): CentOS Linux 6.2
My web server is (include version): Apache
I can login to a root shell on my machine (yes):