title: wordpress : How to specify the cause "This site can’t be reached"
body: <p>I have used Let's Encrypt for WordPress on AWS Lightsail.</p>
  
  <p>I found that it was expired because I didn't renew it.</p>
  
  <p>So I tried the Let's encrypt to renew, the bitnami guide <a href="https://docs.bitnami.com/aws/how-to/generate-install-lets-encrypt-ssl/" rel="nofollow noreferrer">https://docs.bitnami.com/aws/how-to/generate-install-lets-encrypt-ssl/</a> and Cloudflare <a href="https://www.cloudflare.com/" rel="nofollow noreferrer">https://www.cloudflare.com/</a> to apply SSL.</p>
  
  <p>But my site is not displayed after trying various things.</p>
  
  <p>When I try to access my site in chrome, the following message is displayed.</p>
  
  <pre><code>This site can’t be reached
  mydomain.com refused to connect.
  
  Try:
  - Checking the connection
  - Checking the proxy and the firewall
  
  ERR_CONNECTION_REFUSE
  </code></pre>
  
  <p>I tried <code>https://</code>, <code>https://www</code>, <code>http://</code> and <code>http://www</code>, but the same error message was displayed in chrome.</p>
  
  <p>Similar message is displayed in Internet Explorer when I access my site.</p>
  
  <p>When I tried to access with public IP, such as 54.249.xxx.xxx, the result is the same. (This site can’t be reached)</p>
  
  <p>I also checked /opt/bitnami/apache2/logs.</p>
  
  <p>There are some such as <code>error_log-20180dd.gz</code> files in /opt/bitnami/apache2/logs.</p>
  
  <p>But I don't know which message is useful to solve the problem.</p>
  
  <p>What should I check at the beginning? Which log should I check?</p>
  
  <p>It would be appreciated if you could give me some hint.</p>