Challange failed for domain

Hello I have problem to generate the certificate
My domain is: superciccosignal.com
My ip is 192.168.1.148

I ran this command: certbot --nginx -d superciccosignal.com -d www.superciccosignal.com

It produced this output: Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator nginx, Installer nginx
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for superciccosignal.com
http-01 challenge for www.superciccosignal.com
Waiting for verification...
Challenge failed for domain superciccosignal.com
Challenge failed for domain www.superciccosignal.com
http-01 challenge for superciccosignal.com
http-01 challenge for www.superciccosignal.com
Cleaning up challenges
Some challenges have failed.

IMPORTANT NOTES:

My web server is (include version): nginx version: nginx/1.18.0 (Ubuntu)

The operating system my web server runs on is (include version): ubuntu 20.04

My hosting provider, if applicable, is: aruba

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): https://admin.aruba.it/dnspanel/step2.aspx?Culture=it-IT

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot): certbot 0.40.0

Hi @supercicco

192.168.* is a private network. That's not a public known ip address.

So it's impossible that Letsencrypt checks your domain.

A public ipv4 or ipv6 is required.

You could use the dns-01 challenge though, that would not require a public IP address.

Hi @JuergenAuer thanks but now I have a new error:

Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator nginx, Installer nginx
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for superciccosignal.com
http-01 challenge for www.superciccosignal.com
Waiting for verification...
Challenge failed for domain www.superciccosignal.com
Challenge failed for domain superciccosignal.com
http-01 challenge for www.superciccosignal.com
http-01 challenge for superciccosignal.com
Cleaning up challenges
Some challenges have failed.

IMPORTANT NOTES:

How you can see I have changed the record A

Please read your output:

Then read

Is there a running webserver http / port 80? You need one, create one.

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