I can’t issue a letsencrypt cert by running:
sudo letsencrypt certonly \ --standalone \ -d itsnikolay.ru
I get the following exception:
Failed authorization procedure. itsnikolay.ru (tls-sni-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: Failed to connect to 22.214.171.124:443 for TLS-SNI-01 challenge IMPORTANT NOTES: - The following errors were reported by the server: Domain: itsnikolay.ru Type: connection Detail: Failed to connect to 126.96.36.199:443 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.
I made sure those tips by running the following command:
curl 188.8.131.52:443 curl itsnikolay.ru:443 curl 184.108.40.206 curl itsnikolay.ru
And they pass!