title: Port 9300 on Elasticsearch
body: <p>According to the documentation, <a href="http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-transport.html" rel="noreferrer">Elasticsearch reserves port 9300-9400 for cluster communication</a> and <a href="http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-http.html" rel="noreferrer">port 9200-9300 for accessing the elasticsearch APIs</a>. You get the impression that these ranges are <em>inclusive</em>: so port 9300 is part of the first and the second port range. </p>
  
  <p>Now, my IT ops department won't like that, so hopefully I got it wrong. Anyone knows? </p>