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My IP is: ip_address_1
My domain is: domain_1.org
I ran this command: ./letsencrypt-auto --apache -d domain_1.org
It produced this output:
Failed authorization procedure. domain_1.org (tls-sni-01): urn:acme:error:tls :: The server experienced a TLS error during domain verification :: Failed to connect to ip_address_2:443 for TLS-SNI-01 challenge
- The following errors were reported by the server:
Detail: Failed to connect to ip_address_2:443 for TLS-SNI-01
My operating system is (include version): Ubuntu LAMP 16.04
My web server is (include version): Apache 2.4.18
My hosting provider, if applicable, is: DigitalOcean
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.
a) Entering domain_1.org in a browser takes me to the right IP address
b) whois domain_1.org lists NameCheap which is with whom we registered the domain name
c) whois domain_1.org lists WhoIsGuard as the Registrant and Admin
d) whois domain_1.org lists CloudFare as the Name Server which is who we went for DNS
e) nslookup domain_1.org lists 2 non-authoritative IP addresses. One is ip_address_2 and the other is slight variation on ip_address_2 (one is X.X.190.X and the other is X.X.191.X)
f) whois ip_address_1 gives DigitalOcean as the organization
g) nslook ip_address_1 gives a strange result. Non-authoritative answer = 18.104.22.168.in-addr.arp, name=bundlemail.com
h) whois ip_address_2 gives CloudFare as the organization
i) nslook ip_address_2 gives Authoritative answer = CloudFare
j) Initial attempt (~6 days ago) had a failure error with a third IP address that points to NameCheap, with whom we registered the domain name. About 3 days ago, the error message started giving ip_address_2