# How to authenticate to elastic search from java
**URL:** https://discuss.elastic.co/t/how-to-authenticate-to-elastic-search-from-java/249165
**Category:** Elasticsearch
**Tags:** elastic-stack-security
**Created:** [September 18, 2020, 7:35pm UTC](https://discuss.elastic.co/t/how-to-authenticate-to-elastic-search-from-java/249165 "2020-09-18T19:35:18Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@guruthejus](https://discuss.elastic.co/u/guruthejus)
#### Post date: [September 18, 2020, 7:35pm UTC](https://discuss.elastic.co/t/how-to-authenticate-to-elastic-search-from-java/249165/1 "2020-09-18T19:35:18Z")
Hi,
I am trying to authenticate to ES in java. But getting malformed host header exception.
Someone please help here.
```
final CredentialsProvider credentialsProvider =
new BasicCredentialsProvider();
credentialsProvider.setCredentials(AuthScope.ANY,
new UsernamePasswordCredentials("", ""));
RestClientBuilder builder = RestClient.builder(
new HttpHost(elasticSearchHost, elasticSearchPort, "https"))
.setDefaultHeaders(new Header[]{new BasicHeader("Authorization","ApiKey "+"")})
.setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
@Override
public HttpAsyncClientBuilder customizeHttpClient(
HttpAsyncClientBuilder httpClientBuilder) {
return httpClientBuilder
.setDefaultCredentialsProvider(credentialsProvider);
}
});
RestHighLevelClient client = new RestHighLevelClient(
builder);
```
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [September 19, 2020, 2:21am UTC](https://discuss.elastic.co/t/how-to-authenticate-to-elastic-search-from-java/249165/2 "2020-09-19T02:21:23Z")
Welcome. This is how I'm doing it:
>
Note that `clusterUrl` can be `https://myinstance`
---
### Author:  [@guruthejus](https://discuss.elastic.co/u/guruthejus)
#### Post date: [September 19, 2020, 5:06am UTC](https://discuss.elastic.co/t/how-to-authenticate-to-elastic-search-from-java/249165/3 "2020-09-19T05:06:59Z")
Great. It's working. Thanks
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 17, 2020, 5:07am UTC](https://discuss.elastic.co/t/how-to-authenticate-to-elastic-search-from-java/249165/4 "2020-10-17T05:07:29Z")
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