elasticsearch 2.3 - server ip 주소에 Connection refused 에러

localhost:port에는 접속이 되면서 ip address:port로는 접속이 되지 않는 이슈 발생 

# curl real_IP_Address:9200

curl: (7) Failed to connect to real_IP_Address port 9200: Connection refused

# curl localhost:9200

{

  "name" : "Wrath",

  "cluster_name" : "****",

  "version" : {

    "number" : "2.3.2",

    "build_hash" : "****",

    "build_timestamp" : "2016-04-21T16:03:47Z",

    "build_snapshot" : false,

    "lucene_version" : "5.5.0"

  },

  "tagline" : "You Know, for Search"

}

elasticsearch.yml에서 network.host를 아래와 같이 수정하면 문제 해결.

network.host: 0.0.0.0

참고: http://stackoverflow.com/questions/31677563/connection-refused-error-on-elastic-search