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My domain is: internal.phenom-world.com
I ran this command: sudo letsencrypt --apache --tls-sni-01-port 4343 -d internal.phenom-world.com
It produced this output: Detail: Incorrect validation certificate for TLS-SNI-01 challenge.
fce3e971.acme.invalid from 22.214.171.124:443. Received certificate
containing ‘remote.phenom-world.com, www.remote.phenom-world.com’
My operating system is (include version): Ubuntu 16.04
My web server is (include version): Apache 2.6
My hosting provider, if applicable, is: N/A
I can login to a root shell on my machine (yes or no, or I don’t know): yes
I already read the posting titled “TLS-SNI-01 challenge failed due to not able to listen on port 443”. In my case, I’m using an internal server on a vm which is accessible from the outside on the custom port 4343. If I understand correctly, Let’s Encrypt tries to talk to my server but uses port 443 so it will get the “real” server (and not my vm), which knows nothing about what we’re trying to do.
I specified --tls-sni-01-port 4343 - this doesn’t work?