A recent audit revealed that a new network was created in your GCP project. In this network, a GCE instance has an SSH port open to the world. You want to discover this network's origin. What should you do?
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Correct answer: In the Logging section of the console, specify GCE Network as the logging section. Search for the Create Insert entry.
Why this is the answer
The correct approach is to use Cloud Logging (formerly Stackdriver Logging) to find the origin of the network. Specifically, navigating to the Logging section in the console and filtering for resource.type="gcenetwork" and searching for protoPayload.methodName="beta.compute.networks.insert" (or similar compute.networks.insert for GA) will show who created the network and when. This provides an audit trail for network creation. Searching for "Create VM entry" in Stackdriver alerting or Activity logs focuses on VM creation, not network creation. Connecting via SSH to the instance and checking system logs will show instance login activity, not who created the underlying network.
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