# Client certificates

**URL:** <https://discuss.elastic.co/t/client-certificates/104302>\
**Category:** Elasticsearch\
**Created:** [October 17, 2017, 8:05pm UTC](https://discuss.elastic.co/t/client-certificates/104302 "2017-10-17T20:05:48Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sbhawat](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sbhawat/32/23154_2.png) [@sbhawat](https://discuss.elastic.co/u/sbhawat)\
**Post date:** [October 17, 2017, 8:05pm UTC](https://discuss.elastic.co/t/client-certificates/104302/1 "2017-10-17T20:05:48Z")

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Hi All,  
Had a question on java transport client certificates and setting up TLS/SSL using Xpack. Could we reuse client certificate across by multiple application servers which use java client ? Using certgen we generate a client certificate (using default CA ) and do not input/tie it to a particular host. Could that then be reused by multiple application servers in the cluster to connect to the elastic cluster .

Is there a need for each application server(java transport client) to have its own client certificate to connect to the cluster.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [November 14, 2017, 8:06pm UTC](https://discuss.elastic.co/t/client-certificates/104302/2 "2017-11-14T20:06:13Z")

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Closed on November 14, 2017, 8:06pm UTC

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