My domain is:
I ran this command: certbot --authenticator webroot --installer nginx --preferred-challenges http
It produced this output:
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for
Input the webroot for : (Enter 'c' to cancel): /home/website/public
Waiting for verification...
Cleaning up challenges
Failed authorization procedure. (http-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: Fetching http:///.well-known/acme-challenge/OQ-tVtkbdULL5RGoa7bVm_YR9p7z3cAryDYMmI2QlHE: Timeout
IMPORTANT NOTES:
- The following errors were reported by the server:
Domain:
Type: connection
Detail: Fetching
http:///.well-known/acme-challenge/OQ-tVtkbdULL5RGoa7bVm_YR9p7z3cAryDYMmI2QlHE:
Timeout
To fix these errors, please make sure that your domain name was
entered correctly and the DNS A/AAAA 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): nginx version: nginx/1.10.3
The operating system my web server runs on is (include version): debian 9
My hosting provider, if applicable, is: hetzner
I can login to a root shell on my machine: yes
I’m using a control panel to manage my site: no
$ iptables -S
-P INPUT ACCEPT
-P FORWARD ACCEPT
-P OUTPUT ACCEPT
-A INPUT -p tcp -m multiport --dports 80,443 -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT
-A OUTPUT -p tcp -m multiport --dports 80,443 -m conntrack --ctstate ESTABLISHED -j ACCEPT