Let's Encrypt with Nginx : Challenge failed for domain

I'm currently using the default configuration below, as provided by Laravel here (I just swithced to php8.0):

server {
    listen 80;
    server_name www.example.com;
    root /srv/www/example/public;

    add_header X-Frame-Options "SAMEORIGIN";
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Content-Type-Options "nosniff";

    index index.php;

    charset utf-8;

    location / {
        try_files $uri $uri/ /index.php?$query_string;
    }

    location = /favicon.ico { access_log off; log_not_found off; }
    location = /robots.txt  { access_log off; log_not_found off; }

    error_page 404 /index.php;

    location ~ \.php$ {
        fastcgi_pass unix:/var/run/php/php8.0-fpm.sock;
        fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
        include fastcgi_params;
    }

    location ~ /\.(?!well-known).* {
        deny all;
    }
}

But when I run certbot, I'm getting the error below:

~  sudo certbot --nginx -d www.example.com
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 www.example.com
Waiting for verification...
Challenge failed for domain www.example.com
http-01 challenge for www.example.com
Cleaning up challenges
Some challenges have failed.

IMPORTANT NOTES:
 - The following errors were reported by the server:

   Domain: www.example.com
   Type:   unauthorized
   Detail: Invalid response from
   http://www.example.com/.well-known/acme-challenge/KLiVD9nJaMVqJoljNziftqSJXFXCEXsV5mf_d9WthdM
   [123.123.123.3]: "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML
   2.0//EN\">\n<html><head>\n<title>404 Not
   Found</title>\n</head><body>\n<h1>Not Found</h1>\n<p"

   To fix these errors, please make sure that your domain name was
   entered correctly and the DNS A/AAAA record(s) for that domain
   contain(s) the right IP address.

What's wrong with this configuration ?

ahmeddabak

5 years ago

Level 47

Change the well-known section of the config to:

location ~ /.well-known {
    allow all;
}

Then you should use the following command, it will take care of nginx for you.

sudo certbot --nginx -d example.com -d www.example.com

For more info read this digitalocean answer.

devondahon

5 years ago

Level 3

I'm getting the same error message when using this configuration

ahmeddabak

5 years ago

Level 47

You are missing the nginx config for port 443.

1 like

devondahon

5 years ago

Level 3

As per Nginx documentation here, certbox should be adding these lines to the configuration of my website:

    listen 443 ssl; # managed by Certbot

    # RSA certificate
    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem; # managed by Certbot

    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot

    # Redirect non-https traffic to https
    if ($scheme != "https") {
        return 301 https://$host$request_uri;
    } # managed by Certbot

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