# Node communication **URL:** \ **Category:** Elasticsearch\ **Created:** [September 14, 2021, 2:38pm UTC](https://discuss.elastic.co/t/node-communication/284199 "2021-09-14T14:38:32Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Ashwin\_Patil1](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ashwin_patil1/32/90642_2.png) [@Ashwin\_Patil1](https://discuss.elastic.co/u/Ashwin_Patil1)\ **Post date:** [September 14, 2021, 2:38pm UTC](https://discuss.elastic.co/t/node-communication/284199/1 "2021-09-14T14:38:32Z")
I have 3 elastic nodes, I am trying to establish connection between 3 nodes, but not able to establish communication between nodes. Below is the elasticsearch.yml file, please let me what am I doing wrong. ```auto # ======================== Elasticsearch Configuration ========================= # # NOTE: Elasticsearch comes with reasonable defaults for most settings. # Before you set out to tweak and tune the configuration, make sure you # understand what are you trying to accomplish and the consequences. # # The primary way of configuring a node is via this file. This template lists # the most important settings you may want to configure for a production cluster. # # Please consult the documentation for further information on configuration options: # https://www.elastic.co/guide/en/elasticsearch/reference/index.html # # ---------------------------------- Cluster ----------------------------------- # # Use a descriptive name for your cluster: # cluster.name: Elastic_Search # # ------------------------------------ Node ------------------------------------ # # Use a descriptive name for the node: # node.name: node-3 # # Add custom attributes to the node: # #node.attr.rack: r1 # # ----------------------------------- Paths ------------------------------------ # # Path to directory where to store the data (separate multiple locations by comma): # path.data: /var/lib/elasticsearch # # Path to log files: # path.logs: /var/log/elasticsearch # # ----------------------------------- Memory ----------------------------------- # # Lock the memory on startup: # #bootstrap.memory_lock: true # # Make sure that the heap size is set to about half the memory available # on the system and that the owner of the process is allowed to use this # limit. # # Elasticsearch performs poorly when the system is swapping the memory. # # ---------------------------------- Network ----------------------------------- # # By default Elasticsearch is only accessible on localhost. Set a different # address here to expose this node on the network: # network.host: 0.0.0.0 # # By default Elasticsearch listens for HTTP traffic on the first free port it # finds starting at 9200. Set a specific HTTP port here: # http.port: 9200 # # For more information, consult the network module documentation. # # --------------------------------- Discovery ---------------------------------- # # Pass an initial list of hosts to perform discovery when this node is started: # The default list of hosts is ["127.0.0.1", "[::1]"] # discovery.seed_hosts: ["172.16.12.11", "172.16.12.13","172.16.12.14"] # # Bootstrap the cluster using an initial set of master-eligible nodes: # cluster.initial_master_nodes: ["172.16.12.11"] # # For more information, consult the discovery and cluster formation module documentation. # # ---------------------------------- Various ----------------------------------- # # Require explicit names when deleting indices: # action.destructive_requires_name: true xpack.monitoring.enabled: 'true' xpack.monitoring.collection.enabled: 'true' xpack.monitoring.collection.interval: 30s xpack.security.enabled: 'true' xpack.security.audit.enabled: 'false' xpack.security.transport.ssl.enabled: 'true' #xpack.security.http.ssl.enabled: 'true' #xpack.security.authc.api_key.enabled: 'true' #xpack.watcher.enabled: 'false' xpack.ilm.enabled: 'true' ``` ---
**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:** [September 14, 2021, 9:39pm UTC](https://discuss.elastic.co/t/node-communication/284199/2 "2021-09-14T21:39:31Z")
What do your logs show? ---
**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:** [September 15, 2021, 5:40am UTC](https://discuss.elastic.co/t/node-communication/284199/3 "2021-09-15T05:40:32Z")
It looks like you have enabled security but not created or configured any certificates. Please follow the guides around enabling security that are part of the documentation for your version. ---
**Author:** ![Ashwin\_Patil1](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ashwin_patil1/32/90642_2.png) [@Ashwin\_Patil1](https://discuss.elastic.co/u/Ashwin_Patil1)\ **Post date:** [September 15, 2021, 8:42am UTC](https://discuss.elastic.co/t/node-communication/284199/4 "2021-09-15T08:42:32Z")
Below are the logs, ```auto localhost:~ # sudo tail -f /var/log/elasticsearch/Elastic_Search.log [2021-09-15T09:39:21,260][WARN][o.e.d.PeerFinder] [node-2] address [17 2.16.12.11:9300], node [null], requesting [false] connection failed: [][172.16.1 2.11:9300] general node connection failure: handshake failed because connection reset [2021-09-15T09:39:22,260][WARN][o.e.d.PeerFinder] [node-2] address [17 2.16.12.11:9300], node [null], requesting [false] connection failed: [][172.16.1 2.11:9300] general node connection failure: handshake failed because connection reset [2021-09-15T09:39:23,260][WARN][o.e.d.PeerFinder] [node-2] address [17 2.16.12.11:9300], node [null], requesting [false] connection failed: [][172.16.1 2.11:9300] general node connection failure: handshake failed because connection reset [2021-09-15T09:39:24,260][WARN][o.e.d.PeerFinder] [node-2] address [17 2.16.12.11:9300], node [null], requesting [false] connection failed: [][172.16.1 2.11:9300] general node connection failure: handshake failed because connection reset [2021-09-15T09:39:25,260][WARN][o.e.d.PeerFinder] [node-2] address [17 2.16.12.11:9300], node [null], requesting [false] connection failed: [][172.16.1 2.11:9300] general node connection failure: handshake failed because connection reset [2021-09-15T09:39:26,260][WARN][o.e.d.PeerFinder] [node-2] address [17 2.16.12.11:9300], node [null], requesting [false] connection failed: [][172.16.1 2.11:9300] general node connection failure: handshake failed because connection reset [2021-09-15T09:39:27,261][WARN][o.e.d.PeerFinder] [node-2] address [17 2.16.12.11:9300], node [null], requesting [false] connection failed: [][172.16.1 2.11:9300] general node connection failure: handshake failed because connection reset [2021-09-15T09:39:28,261][WARN][o.e.d.PeerFinder] [node-2] address [17 2.16.12.11:9300], node [null], requesting [false] connection failed: [][172.16.1 2.11:9300] general node connection failure: handshake failed because connection reset ``` ---
**Author:** ![Ashwin\_Patil1](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ashwin_patil1/32/90642_2.png) [@Ashwin\_Patil1](https://discuss.elastic.co/u/Ashwin_Patil1)\ **Post date:** [September 15, 2021, 11:20am UTC](https://discuss.elastic.co/t/node-communication/284199/5 "2021-09-15T11:20:30Z")
I have added the certificate to elasticsearch.yml and tried to restart but it fails. @warkolm @Christian_Dahlqvist ```auto xpack.monitoring.enabled: 'true' xpack.monitoring.collection.enabled: 'true' xpack.monitoring.collection.interval: 30s xpack.security.enabled: 'true' xpack.security.audit.enabled: 'false' xpack.security.transport.ssl.enabled: 'true' xpack.security.transport.ssl.verification_mode: certificate xpack.security.transport.ssl.client_authentication: required xpack.security.transport.ssl.keystore.path: elastic-certificates.p12 xpack.security.transport.ssl.truststore.path: elastic-certificates.p12 ``` ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [October 13, 2021, 11:21am UTC](https://discuss.elastic.co/t/node-communication/284199/6 "2021-10-13T11:21:15Z")
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