Problem creating a certificate for a new domain in a Ubuntu Server

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My domain is: ngoassessoria.com.br

I ran this command: sudo certbot --nginx -d ngoassessoria.com.br -d www.ngoassessoria.com.br

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 ngoassessoria.com.br
http-01 challenge for www.ngoassessoria.com.br
Waiting for verification...
Challenge failed for domain ngoassessoria.com.br
Challenge failed for domain www.ngoassessoria.com.br
http-01 challenge for ngoassessoria.com.br
http-01 challenge for www.ngoassessoria.com.br
Cleaning up challenges
Some challenges have failed.

IMPORTANT NOTES:

My web server is (include version): Linux Ubuntu 20.04 - Nginx 1.18

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

My hosting provider, if applicable, is: Myself

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

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

I tried the same configuration in another server and it worked perfectly. This one is in a cliente site and seems to have all the right ports open. We use UFW and all the right ports are open.

I can't see your domain with HTTP from various parts of the globe.

Do you have a geographic based firewall blocking access from outside Brazil?

The Let's Debug test site is good for testing new setups. Right now connections to your domain times out
https://letsdebug.net

4 Likes

It's strange. We don't have any kind of blocking access for outside Brazil. I will ask the TI guys from the company I am working for to check all the routers and firewalls again.

2 Likes

Looks very likely a geographic based firewall

5 Likes

Thank you! I gonne ask my customer to check this with their Internet provider.

2 Likes

Mike you was right! they found a firewall in one of the routers blocking some international traffic. All right now! Thank you so much for your time and help!!!

3 Likes

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