Troubleshooting

This section collects common installation or usage issues on the Wazuh dashboard, and some basic steps to solve them.

Wazuh API seems to be down

This issue means that your Wazuh API might be unavailable. Check the status of the Wazuh manager to check if the service is active:

# systemctl status wazuh-manager

If the Wazuh API is running, try to fetch data using the CLI from the Wazuh dashboard server:

# curl -k -X GET "https://<api_url>:55000/" -H "Authorization: Bearer $(curl -u <api_user>:<api_password> -k -X POST 'https://<api_url>:55000/security/user/authenticate?raw=true')"

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                               Dload  Upload   Total   Spent    Left  Speed
  100   271  100   271    0     0    879      0 --:--:-- --:--:-- --:--:--   882
  {"data": {"title": "Wazuh API REST", "api_version": "4.1.1", "revision": 40110, "license_name": "GPL 2.0", "license_url": "https://github.com/wazuh/wazuh/blob/4.1/LICENSE", "hostname": "localhost.localdomain", "timestamp": "2021-03-03T10:01:18+0000"}, "error": 0}

I do not see alerts in the Wazuh dashboard

The first step is to check if there are alerts in Wazuh indexer.

# curl https://<WAZUH_INDEXER_IP>:9200/_cat/indices/wazuh-alerts-* -u <wazuh_indexer_user>:<wazuh_indexer_password> -k

 green open wazuh-alerts-4.x-2021.03.03 xwFPX7nFQxGy-O5aBA3LFQ 3 0 340 0 672.6kb 672.6kb

If you do not see any Wazuh related index, it means you have no alerts stored in Wazuh indexer.

To ensure that Filebeat is correctly configured, run the following command:

# filebeat test output

elasticsearch: https://127.0.0.1:9200...
  parse url... OK
  connection...
    parse host... OK
    dns lookup... OK
    addresses: 127.0.0.1
    dial up... OK
  TLS...
    security: server's certificate chain verification is enabled
    handshake... OK
    TLS version: TLSv1.3
    dial up... OK
  talk to server... OK
  version: 7.10.2

Could not connect to API with id: default: 3003 - Missing param: API USERNAME

Starting Wazuh 4.0 the Wazuh API username variable changed from user to username. It's necessary to change the credentials (foo:bar are no longer accepted) as well as the name of the variable in the /usr/share/wazuh-dashboard/data/wazuh/config/wazuh.yml configuration file. For example, the configuration can be:

hosts:
 - production:
     url: https://localhost
     port: 55000
     username: wazuh-wui
     password: wazuh-wui
     run_as: false

"Wazuh API and Wazuh dashboard version mismatch" error is displayed

This error shows a mismatch between the Wazuh server and the Wazuh dashboard versions.

The Wazuh server and the Wazuh dashboard must run the same major and minor versions. For example:

  • Wazuh server 4.5.x

  • Wazuh dashboard 4.5.y

Moreover, we recommend both server and dashboard run the same full version, for example 4.5.2. Running the same full version ensures the correct operation and communication between these components.

Check out how to upgrade Wazuh in our upgrade guide.

Saved object for index pattern not found

Saved objects store data for later use, including dashboards, visualizations, maps, index patterns, and more.

This message indicates that there is a problem loading the information of an index pattern which should be stored in a saved object, but the dashboard is unable to find it.

This situation can happen if the indexer is reinstalled and the previously saved objects are lost, while the dashboard is running and is not restarted in the process.

Remediation

The dashboard initializes the saved objects with the index definitions when it starts, so the suggested solution is to restart the service to initialize the saved objects again.

  1. Restart the Wazuh dashboard service.

    # systemctl restart wazuh-dashboard

    This will initialize the index with the required mappings.

    Note

    If the index contains data but has missing objects, the dashboard will migrate the data to a new index with the missing objects added.

If the restart does not solve the problem, we can execute this process manually:

  1. Stop the Wazuh dashboard service.

    # systemctl stop wazuh-dashboard

  2. Identify the index or indices that have the wrong field mappings, this depends on the logged user that experiences the problem or the selected tenant. By default, the index name should start with .kibana.

  3. Get the field mapping for the type field for the indices that store the saved objects.

    # curl https://<WAZUH_INDEXER_IP>:9200/.kibana*/_mapping/field/type?pretty -u <wazuh_indexer_user>:<wazuh_indexer_password> -k

    {
  ".kibana" : {
    "mappings" : {
      "type" : {
        "full_name" : "type",
        "mapping" : {
          "type" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          }
        }
      }
    }
  },
  ".kibana_92668751_admin_1" : {
    "mappings" : {
      "type" : {
        "full_name" : "type",
        "mapping" : {
          "type" : {
            "type" : "text",
            "fields" : {
              "keyword" : {
                "type" : "keyword",
                "ignore_above" : 256
              }
            }
          }
        }
      }
    }
  }
}

    In the output, we can see type field mapping for the .kibana and .kibana_92668751_admin_1 indices. Note that the field mapping type for the type field is text and that it contains a subfield called keyword. This is not the expected result, the type field should be keyword, not text, and it should not include the keyword subfield.

    These errors happened because there was no template that specified the appropriate field mappings at the time the saved object data was indexed. To solve the errors, we need to remove the index and rebuild it.

  4. Delete the index or indices that store the saved objects with the wrong field mapping.

    # curl https://<WAZUH_INDEXER_IP>:9200/<INDEX/INDICES_SEPARATED_BY_COMMAS> -u <wazuh_indexer_user>:<wazuh_indexer_password> -k -XDELETE

    {“acknowledged”:true}

  5. Restart the Wazuh dashboard service.

    # systemctl restart wazuh-dashboard

Note

These actions take into account that the index that stores the saved objects must have valid field mappings. The field mappings are defined through a template, so they should exist before the index is created. This template is added when Wazuh dashboard starts if it doesn’t exist.

None of the above solutions are fixing my problem

We have a welcoming community which can help you with most of the problems you might have regarding Wazuh deployment and usage https://wazuh.com/community.

Also, you can contact us opening issues in our GitHub repositories under the organization.

We will be interested in the log files of your deployment. You can check them out on each component:

Check the following log files:

  • Wazuh indexer:

# cat /var/log/wazuh-indexer/wazuh-cluster.log | grep -i -E "error|warn"

  • Wazuh manager:

# cat /var/log/filebeat/filebeat | grep -i -E "error|warn"

# cat /var/ossec/logs/ossec.log | grep -i -E "error|warn"

  • Wazuh dashboard:

# journalctl -u wazuh-dashboard

# cat /usr/share/wazuh-dashboard/data/wazuh/logs/wazuhapp.log | grep -i -E "error|warn"

Note

The Wazuh indexer uses the /var/log folder to store logs by default.

Warning

By default, the Wazuh dashboard doesn't store logs on a file. You can change this by configuring logging.dest setting in the opensearch_dashboard.yml configuration file.