Bind to localhosteditElasticsearch 2.x will only bind to localhost by default. It will try to bind to both 127.0.0.1 (IPv4) and [::1] (IPv6), but will work happily in environments where only IPv4 or IPv6 is available. This change prevents Elasticsearch from trying to connect to other nodes on your network unless you specifically tell it to do so. When moving to production you should configure th..