hi @wizard
I can resolve your domain
But I can’t connect to it.
If you are fire-walling incoming connections then review this article:
Note: certbot works on port 80 and 443 for HTTP and TLS-SNI challenges.
LetsEncrypt also does not publish public IPs.
Review this conversation: Letsencrypt-win-simple unable to complete challenges - Firewall Blocking Incoming Requests
Andrei