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Securing S3 Buckets

Adam Youngberg relates an experience with securing public S3 buckets:

As a response to our initial alert, we took action to identify all of our S3 buckets and the public / non-public status. Since Databricks is a cloud-native company, we had already deployed JupiterOne, a commercial cloud asset management solution that allowed us to quickly query and determine which assets were public. Open-source tools are available, such as Cartography from Lyft, which allow for similar query capabilities. With the outputs of our queries, we were able to quickly identify and triage our public buckets and determine whether they should remain public.

Read on for the process, as well as some issues they experienced in rollout.