What is a necessary step to configure event forwarding from Splunk to Phantom?

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To configure event forwarding from Splunk to Phantom, it is essential to create a Splunk alert that utilizes a script, such as event_forward.py, to send events to Phantom. This process involves setting up specific triggers within Splunk that detect certain events or conditions, prompting the alert to activate and execute the designated script. This script is responsible for formatting the data correctly and transmitting it to the Phantom platform, facilitating automated responses or further analysis based on the forwarded events.

In this context, simply mapping CIM to CEF fields or the other options do not directly address the core requirement of actively sending data from Splunk to Phantom. Mapping data formats is more about ensuring compatibility between systems rather than implementing the forwarding process itself. Creating a saved search that generates JSON, while useful for certain integrations, does not inherently implement the live alerting and forwarding mechanism required for event forwarding. Thus, having a dedicated alert triggering the forwarding script is the necessary step in this scenario.