Elasticsearch Magento test connection fails

[DevQ]

Hello,
I have installed Elasticsearch on a different server than the Magento is hosted. I have config it to be accessible over Apache and it's working everything OK.

If I go over browser to domain where I config it https://xxxxx.xxxxx.xx/

I get displayed in browser: 

{
  "name" : "F_BKG4z",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "KT8JBm8RTee7xTxtMv_zSg",
  "version" : {
    "number" : "6.8.2",
    "build_flavor" : "default",
    "build_type" : "rpm",
    "build_hash" : "b506955",
    "build_date" : "2019-07-24T15:24:41.545295Z",
    "build_snapshot" : false,
    "lucene_version" : "7.7.0",
    "minimum_wire_compatibility_version" : "5.6.0",
    "minimum_index_compatibility_version" : "5.0.0"
  },
  "tagline" : "You Know, for Search"
}

and if I go to: https://xxxxx.xxxxx.xx/_cluster/health

I get displayed in browser:

{"cluster_name":"elasticsearch","status":"green","timed_out":false,"number_of_nodes":1,"number_of_data_nodes":1,"active_primary_shards":0,"active_shards":0,"relocating_shards":0,"initializing_shards":0,"unassigned_shards":0,"delayed_unassigned_shards":0,"number_of_pending_tasks":0,"number_of_in_flight_fetch":0,"task_max_waiting_in_queue_millis":0,"active_shards_percent_as_number":100.0}

It seems that everything is working OK.

But If I enter this host to elasticsearch configuration in magento admin I get connection failed error.

Any Ideas?

[DevQ]

Hello,

I have tried to change the port to 80 and the test connection is working now, but if I change it to 443 I get an error.

I tried to connect from terminal where magento is installed with CURL and it's connecting to 443 without problems.