title: SSL not working after updating cert with letsencrypt
body: <p>I have nginx which I'm using mainly as a reverse proxy. I have many services running at home such as Plex. It is reachable through plex.mydomain.com for which I have created a letsencrypt certificate. 
  Everything was working perfectly until I have updated the letsencrypt certificates. Since then, only my desktop Chrome still works but I'm suspecting it is doing so because of its cache. Safari does not work, neither curl nor wget.</p>
  
  <p>The nginx conf is the following</p>
  
  <pre><code>server {
          listen                  80 ;
          server_name  plex.mydomain.com plex.myotherdomain.com ;
          rewrite ^ https://$server_name$request_uri? permanent;
  }
  server {
          listen        443;
          server_name  plex.mydomain.com plex.myotherdomain.com ;
          satisfy any;
          allow 192.168.1.0/24; ##chez moi
          deny all;
          auth_basic "closed site";
          auth_basic_user_file /etc/nginx/certs/password;
          ssl_certificate /etc/letsencrypt/live/plex.mydomain.com/fullchain.pem;
          ssl_certificate_key /etc/letsencrypt/live/plex.mydomain.com/privkey.pem;
  
  
          location / {
              proxy_pass        http://192.168.1.102:5000;
              proxy_redirect http:// $scheme://;
              proxy_set_header Host $host;
              proxy_set_header X-Real-IP $remote_addr;
              proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
              proxy_set_header X-Forwarded-Proto $scheme;
  
      }
  }
  </code></pre>
  
  <p>If I run  <code>curl https://plex.mydomain.com</code> then I get <code>curl: (56) SSLRead() return error -9806</code>.</p>
  
  <p>When I access <code>plex.mydomain.com</code> from Safari, Nginx logs give </p>
  
  <pre><code>2016/08/09 19:23:27 [alert] 52081#0: worker process 53076 exited on signal 11
  2016/08/09 19:23:27 [notice] 52081#0: start worker process 53079
  2016/08/09 19:23:27 [notice] 52081#0: signal 23 (SIGIO) received
  2016/08/09 19:23:27 [notice] 52081#0: signal 23 (SIGIO) received
  </code></pre>
  
  <p>The letsencrypt certificate has been generated with the following command:</p>
  
  <pre><code>sudo certbot certonly --standalone -d plex.mydomain.com -d plex.myotherdomain.com
  </code></pre>
  
  <p>Any idea what am I doing wrong?
  Thank you very much for your help.</p>