# Splunk

{% hint style="info" %}
The Splunk output is currently a *technology preview*. The design and implementation are less mature than stable features and subject to change.
{% endhint %}

The Splunk HEC output can be used to send records to [Splunk Enterprise](https://www.splunk.com/en_us/software/splunk-enterprise.html) or [Splunk Cloud Platform](https://www.splunk.com/en_us/software/splunk-cloud-platform.html) via the [HTTP Event Collector](https://docs.splunk.com/Documentation/Splunk/latest/Data/UsetheHTTPEventCollector).

## EF\_OUTPUT\_SPLUNK\_HEC\_ENABLE

Specifies whether the Splunk output is enabled.

* Valid Values
  * `true`, `false`
* Default
  * `false`

## EF\_OUTPUT\_SPLUNK\_HEC\_CIM\_ENABLE

Specifies whether the data will be sent using the Splunk Common Information Model (CIM).

* Valid Values
  * `true`, `false`
* Default
  * `false`

## EF\_OUTPUT\_SPLUNK\_HEC\_ADDRESSES

This setting specifies the Splunk servers to which the output should connect. It is a comma-separated list of Splunk nodes, including port number.

{% hint style="danger" %}
Do **NOT** include `http://` or `https://` in the provided value. TLS communications is enabled/disabled using `EF_OUTPUT_SPLUNK_HEC_TLS_ENABLE`.
{% endhint %}

* Default
  * `127.0.0.1:8088`

## EF\_OUTPUT\_SPLUNK\_HEC\_TOKEN

The HTTP Event Collector token to use when sending records to Splunk.

* Default
  * `''`

## EF\_OUTPUT\_SPLUNK\_HEC\_BATCH\_DEADLINE

The maximum time, in milliseconds, to wait for a batch of records to fill before being sent to Splunk.

* Default
  * `2000`

## EF\_OUTPUT\_SPLUNK\_HEC\_BATCH\_MAX\_BYTES

The maximum size, in bytes, for a batch of records being sent to Splunk.

* Default
  * `8388608`

## EF\_OUTPUT\_SPLUNK\_HEC\_TLS\_ENABLE

This setting is used to enable/disable TLS connections to Splunk.

* Valid Values
  * `true`, `false`
* Default
  * `false`

## EF\_OUTPUT\_SPLUNK\_HEC\_TLS\_SKIP\_VERIFICATION

This setting is used to enable/disable TLS verification of the Splunk server to which the output is attempting to connect.

* Valid Values
  * `true`, `false`
* Default
  * `false`

## EF\_OUTPUT\_SPLUNK\_HEC\_TLS\_CA\_CERT\_FILEPATH

The path to the Certificate Authority (CA) certificate to use for verification of the Splunk server to which the output is attempting to connect.

* Default
  * `''`

## EF\_OUTPUT\_SPLUNK\_HEC\_DROP\_FIELDS

This setting allows for a comma-separated list of fields that are to be removed from all records.

{% hint style="info" %}
Fields are dropped after any output specific fields have been added and after any schema conversion. This means that you should use the field names as you see them in the user interface.
{% endhint %}

* Valid Values
  * any field names related to the enabled schema, comma-separated
* Example
  * `flow.export.sysuptime,flow.export.version.ver,flow.start.sysuptime,flow.end.sysuptime,flow.seq_num`
* Default
  * `''`

## EF\_OUTPUT\_SPLUNK\_HEC\_ALLOWED\_RECORD\_TYPES

This setting allows for a comma-separated list of record types that the output will send will emit. If left empty, all types will be allowed by default.

* Valid Values
  * `as_path_hop`, `flow_option`, `flow`, `ifa_hop`, `telemetry`, `metric`, `log`
* Default
  * `'as_path_hop,flow_option,flow,ifa_hop,telemetry,metric,log'`


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