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My domain is: external-portal.dyndns.org
It produced this output:Failed authorization procedure. www.external-portal.dyndns.org (http-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: DNS problem: NXDOMAIN looking up A for www.external-portal.dyndns.org
The following errors were reported by the server:
To fix these errors, please make sure that your domain name was
entered correctly and the DNS A 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.
My operating system is (include version): Mac OSX 10.11.6 El Capitan
My web server is (include version):Mac OSX 10.11.6 El Capitan
My hosting provider, if applicable, is: This is a MacMini on my LAN
I can login to a root shell on my machine (yes or no, or I don’t know): I think so, yes
I’m using a control panel to manage my site (no, or provide the name and version of the control panel):NO