title: curl: (7) Failed to connect to port 80, and 443 - on one domain
body: <p>This question shows research effort; it is useful and clear</p>
  
  <p>I have checked the cURL not working properly </p>
  
  <p>When I run the command <code>curl -I https://www.example.com/sitemap.xml</code></p>
  
  <pre><code>curl: (7) Failed to connect
  
  Failed to connect on all port
  </code></pre>
  
  <p>this error only on one domain, all other domain working fine, curl: (7) Failed to connect to port 80, and 443</p>
  
  <p>Thanks...</p>