securityonion/salt/elasticsearch/templates/component/so/dtc-source-mappings.json

{
  "_meta": {
    "documentation": "https://www.elastic.co/guide/en/ecs/current/ecs-source.html",
    "ecs_version": "1.12.2"
  },
  "template": {
    "mappings": {
      "properties": {
        "source": {
          "properties": {
            "geo": {
              "properties": {
                "country_name": {
                  "ignore_above": 1024,
                  "type": "keyword",
                  "fields": {
                    "keyword": {
                      "type": "keyword"
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}