Inbound Connection to an Unsecure Elasticsearch Nodeedit

Identifies Elasticsearch nodes that do not have Transport Layer Security (TLS), and/or lack authentication, and are accepting inbound network connections over the default Elasticsearch port.

Rule type: query

Rule indices:

  • packetbeat-*
  • logs-network_traffic.*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100



  • Use Case: Threat Detection
  • Tactic: Initial Access
  • Domain: Endpoint

Version: 104

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guideedit


This rule requires the addition of port 9200 and send_all_headers to the HTTP protocol configuration in packetbeat.yml. See the References section for additional configuration documentation.

Rule queryedit

(event.dataset: network_traffic.http OR (event.category: network_traffic AND network.protocol: http)) AND
    status:OK AND destination.port:9200 AND network.direction:inbound AND NOT http.response.headers.content-type:"image/x-icon" AND NOT