what do the kibana-logs and elasticsearch logs say? Is ES getting the requests and responding to them?
This seems more of an issue with the reverse-proxy than with your configuration. Setting the correct elasticsearch.url in the kibana.yml should be sufficient.
Reverse proxy seems to be fine. I have placed a log in actual api which is handling _search.It is reaching that point. Earlier i was not getting "Cookie" headers. Due to which authentication was failing. Later i whitelisted Cookie header in kibana.yml configuration I guess its more to do with header or other information. Since _search is internal call of kibana.
Definately i will take care of proxy part. Please can you let me know if we have to use elastic.url as proxy. Then what are the changes required in kibana.yml to acheive the same. I am using ELK version 6.0.0.
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