Which condition might warrant using a Heavy Forwarder?

Using a Heavy Forwarder is particularly warranted in scenarios where the data needs to be masked or filtered before it is sent to the cloud. This type of forwarder has the capability to perform more complex data processing tasks, such as modifying the data content or applying transformations before forwarding it to a Splunk instance. When sensitive information requires redaction or specific fields necessitate filtering out unnecessary data, the Heavy Forwarder effectively manages these requirements.

In contrast, the other scenarios outlined do not leverage the primary strength of a Heavy Forwarder. For instance, utilizing a forwarder when the data does not require filtering indicates that simpler forwarding options would suffice, as there would be no need for the advanced processing capabilities. Similarly, managing straightforward inputs does not require the robust features of a Heavy Forwarder, which are intended for intricate use cases. Lastly, while sending data over wide area networks is a concern, the optimal choice of forwarder depends more on the nature of the data processing required rather than the network characteristics alone.

Overall, the capability to mask or filter data during transit is a defining characteristic of a Heavy Forwarder, making it the ideal choice in such circumstances.