Search Guard connect to remote Elasticsearch cluster using SSL

Question

Used this guide for SSL certs creation

I'm trying to connect to remote Elasticsearch cluster. Both clusters are using SSL certificates (signed by same CA), is it possible ?

Local cluster:

cluster.name: client1
searchguard.enterprise_modules_enabled: false


node.name: ekl.test.com
node.master: true
node.data: true
node.ingest: true


network.host: 0.0.0.0

#http.host: 0.0.0.0
network.publish_host: ["ekl1.test1.com","ekl.test.com"]



http.port: 9200


discovery.zen.ping.unicast.hosts: ["ekl.test.com", "ekl2.test2.com"]


discovery.zen.minimum_master_nodes: 1

xpack.security.enabled: false


searchguard.ssl.transport.pemcert_filepath: '/etc/elasticsearch/ssl/node1.pem'
searchguard.ssl.transport.pemkey_filepath: 'ssl/node1.key'
searchguard.ssl.transport.pemtrustedcas_filepath: '/etc/elasticsearch/ssl/root-ca.pem'
searchguard.ssl.transport.enforce_hostname_verification: false
searchguard.ssl.transport.resolve_hostname: false
searchguard.ssl.http.enabled: true
searchguard.ssl.http.pemcert_filepath: '/etc/elasticsearch/ssl/node1_http.pem'
searchguard.ssl.http.pemkey_filepath: '/etc/elasticsearch/ssl/node1_http.key'
searchguard.ssl.http.pemtrustedcas_filepath: '/etc/elasticsearch/ssl/root-ca.pem'
searchguard.nodes_dn:
- CN=ekl.test.com,OU=Ops,O=BugBear BG\, Ltd.,DC=BugBear,DC=com
- CN=ekl1.test1.com,OU=Ops,O=BugBear BG\, Ltd.,DC=BugBear,DC=com
searchguard.authcz.admin_dn:
- CN=admin.test.com,OU=Ops,O=BugBear Com\, Inc.,DC=example,DC=com

Remote cluster:

cluster.name: client2
searchguard.enterprise_modules_enabled: false


node.name: ekl1.test.com
node.master: false
node.data: true
node.ingest: false


network.host: 0.0.0.0

#http.host: 0.0.0.0
network.publish_host: ["ekl.test.com","ekl1.test1.com"]



http.port: 9200


discovery.zen.ping.unicast.hosts: ["ekl6.test1.com", "ekl1.test1.com"]


discovery.zen.minimum_master_nodes: 1

xpack.security.enabled: false


searchguard.ssl.transport.pemcert_filepath: '/etc/elasticsearch/ssl/node2.pem'
searchguard.ssl.transport.pemkey_filepath: 'ssl/node2.key'
searchguard.ssl.transport.pemtrustedcas_filepath: '/etc/elasticsearch/ssl/root-ca.pem'
searchguard.ssl.transport.enforce_hostname_verification: false
searchguard.ssl.transport.resolve_hostname: false
searchguard.ssl.http.enabled: true
searchguard.ssl.http.pemcert_filepath: '/etc/elasticsearch/ssl/node2_http.pem'
searchguard.ssl.http.pemkey_filepath: '/etc/elasticsearch/ssl/node2_http.key'
searchguard.ssl.http.pemtrustedcas_filepath: '/etc/elasticsearch/ssl/root-ca.pem'
searchguard.nodes_dn:
- CN=ekl.test.com,OU=Ops,O=BugBear BG\, Ltd.,DC=BugBear,DC=com
- CN=ekl1.test1.com,OU=Ops,O=BugBear BG\, Ltd.,DC=BugBear,DC=com
searchguard.authcz.admin_dn:
- CN=admin.test.com,OU=Ops,O=BugBear Com\, Inc.,DC=example,DC=com
Certificates are self-signed

I can make curl to remote cluster from local one.

 curl -vX GET "https://admin:Pass@ekl1.test1.com:9200"

I added remote domain in Kibana GUI: ekl1.test1.com:9200

and getting this error in ES log:

RemoteClusterConnection] [4P1fXFO] fetching nodes from external cluster >[client2] failed org.elasticsearch.transport.ConnectTransportException: [][172.31.37.123:9200] >handshake_timeout[30s]

Answer 1

Solved by specifying port 9300 instead 9200 in Kibana interface

and

http.cors.enabled: true
http.cors.allow-origin: "*"