The previous poster is referring to
which refers to a firewall blocking connections to port 443. Did you get the exact same error ("Failed to connect ... :443 for TLS-SNI-01 challenge") while using Certbot for your renewal?
The previous poster is referring to
which refers to a firewall blocking connections to port 443. Did you get the exact same error ("Failed to connect ... :443 for TLS-SNI-01 challenge") while using Certbot for your renewal?