./letsencrypt-auto --apache -d "Failed to connect to for TLS-SNI-01"

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My domain is: zethago.tk

I ran this command: ./letsencrypt-auto --apache -d zethago.tk

It produced this output: Requesting root privileges to run certbot…
/home/erick/.local/share/letsencrypt/bin/letsencrypt --apache -d zethago.tk
Failed authorization procedure. zethago.tk (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: zethago.tk
    Type: connection
    Detail: Failed to connect to for TLS-SNI-01

My operating system is (include version): Linux Mint 18

My web server is (include version): Apache 2.4.18

My hosting provider, if applicable, is: http://www.dot.tk

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

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

Have you got a firewall or anything that could be blocking access to from the internet ?

Linux mint comes with ufw firewall, which I add ‘in’ access.

$ sudo ufw app list
Available applications:
Apache Full
Apache Secure

$ sudo ufw app info "Apache Full"
Profile: Apache Full
Title: Web Server (HTTP,HTTPS)
Description: Apache v2 is the next generation of the omnipresent Apache web


Please note that I can use curl, and get html content.

$ curl http://www.zethago.tk

Please also note that I am currently experiment this apache server on my laptop, which I would turn it off sometime.

Thank you so much for your help.

http is port 80

the error / issue is regarding https ( port 443). using curl I can access http://www.zethago.tk but not https://www.zethago.tk. Can you access https (port 443 ) ?

I have not set up any https. I keep thinking that I need to create certificate, first. I will try what you suggested now by going to the dns, and adding https.

Thank you.

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