# Cross cluster search **URL:** \ **Category:** Elasticsearch\ **Tags:** ccs-cross-cluster-search\ **Created:** [April 28, 2022, 9:10am UTC](https://discuss.elastic.co/t/cross-cluster-search/303484 "2022-04-28T09:10:46Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![InJong\_Park](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/injong_park/32/48785_2.png) [@InJong\_Park](https://discuss.elastic.co/u/InJong_Park)\ **Post date:** [April 28, 2022, 9:10am UTC](https://discuss.elastic.co/t/cross-cluster-search/303484/1 "2022-04-28T09:10:46Z")
Hello. I’m InJong. I have a short question. Is it possible connect es-7.2.1(self) to es-7.17(elastic-cloud) for cross cluster search. ---
**Author:** ![grfneto](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/grfneto/32/125776_2.png) [@grfneto](https://discuss.elastic.co/u/grfneto)\ **Post date:** [April 28, 2022, 7:13pm UTC](https://discuss.elastic.co/t/cross-cluster-search/303484/2 "2022-04-28T19:13:27Z")
Hi @InJong_Park Welcome to the community, You can configure one remote cluster to communicate with your environment (self) and the other (Cloud). There must be communication between these Elasticsearch services. The link below explains in more detail how you can configure and then create your search among the clusters: > **[Connect to remote clusters | Elasticsearch Guide \[7.17\] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/7.17/remote-clusters-connect.html)** ---
**Author:** ![ghudgins](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ghudgins/32/138532_2.png) [@ghudgins](https://discuss.elastic.co/u/ghudgins)\ **Post date:** [April 28, 2022, 9:25pm UTC](https://discuss.elastic.co/t/cross-cluster-search/303484/3 "2022-04-28T21:25:30Z")
there's also this matrix of version-to-version compatibility [Search across clusters | Elasticsearch Guide [8.1] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-cross-cluster-search.html#ccs-supported-configurations) ---
**Author:** ![InJong\_Park](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/injong_park/32/48785_2.png) [@InJong\_Park](https://discuss.elastic.co/u/InJong_Park)\ **Post date:** [April 29, 2022, 12:56am UTC](https://discuss.elastic.co/t/cross-cluster-search/303484/4 "2022-04-29T00:56:32Z")
@ghudgins @grfneto Thank you for your help. I followed the guide you gave me. But i can't connect es-7.2.1(self/local) to es-7.17(elastic-cloud). Elasticsearch log ```auto handshake failed because connection reset ``` I think need configuration that trust transport.ssl. So, I tried to find a way to connect the elastic cloud with my self-managed cluster, but I couldn't find it. (detail configuration.) ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [April 29, 2022, 5:09am UTC](https://discuss.elastic.co/t/cross-cluster-search/303484/5 "2022-04-29T05:09:52Z")
As far s I know Elastic Cloud only supports CCS between Elastic Cloud clusters and does not support connecting to external self hosted clusters. If you look at [the docs](https://www.elastic.co/guide/en/cloud/current/ec-enable-ccs.html#ec-ccs-ccr-prerequisites) all clusters must belong to the same Elastic Cloud account, which the self hosted one does not. I would recommend contacting Elastic Cloud support to verify though. ---
**Author:** ![InJong\_Park](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/injong_park/32/48785_2.png) [@InJong\_Park](https://discuss.elastic.co/u/InJong_Park)\ **Post date:** [May 6, 2022, 9:15am UTC](https://discuss.elastic.co/t/cross-cluster-search/303484/6 "2022-05-06T09:15:13Z")
Thank you for your help. ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [May 10, 2022, 6:50am UTC](https://discuss.elastic.co/t/cross-cluster-search/303484/7 "2022-05-10T06:50:18Z")
Also please note that 7.2 is [EOL](https://www.elastic.co/support/eol) and you should really upgrade. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [June 7, 2022, 6:50am UTC](https://discuss.elastic.co/t/cross-cluster-search/303484/8 "2022-06-07T06:50:49Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.