Urn:acme:error:connection :: Connection impossible from the server on port 443

Please fill out the fields below so we can help you better.

My domain is:

I ran this command:

It produced this output:
Which names would you like to activate HTTPS for?
1: glpi.cefim.eu
Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter ‘c’ to cancel):1
Starting new HTTPS connection (1): acme-v01.api.letsencrypt.org
Obtaining a new certificate
Performing the following challenges:
tls-sni-01 challenge for glpi.cefim.eu
/usr/lib/python2.7/dist-packages/OpenSSL/rand.py:58: UserWarning: implicit cast from 'char ’ to a different pointer type: will be forbidden in the future (check that the types are as you expect; use an explicit ffi.cast() if they are correct)
** result_code = _lib.RAND_bytes(result_buffer, num_bytes)
Waiting for verification…
Cleaning up challenges
Failed authorization procedure. glpi.cefim.eu (tls-sni-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: Failed to connect to for tls-sni-01 challenge

** - The following errors were reported by the server:**

** Domain: glpi.cefim.eu**
** Type: connection**
** Detail: Failed to connect to for tls-sni-01**
** challenge**

** 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 web server is (include version):
Server version: Apache/2.4.10 (Debian)

The operating system my web server runs on is (include version):
Linux CertBot 3.16.0-4-686-pae #1 SMP Debian 3.16.43-2 (2017-04-30) i686 GNU/Linux

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don’t know):

I’m using a control panel to manage my site (no, or provide the name and version of the control panel):

I just saw on the firewall rules that the port 443 isn’t close. Please help and tell me if you need more informations.

I can see that port 80 (unencrypted HTTP) is open on that IP address while port 443 (HTTPS) is closed. :slightly_frowning_face:

Are you sure you opened port 443 in both your operating system firewall (via ssh) and in the Amazon Web Services control panel?

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