[CT.S3.PR.1] Require an Amazon S3 bucket to have block public access settings configured

Question

Planning to enable this preventive control '[CT.S3.PR.1] Require an Amazon S3 bucket to have block public access settings configured' in Control Tower. Is there any way to set exception to some S3 buckets for this control?

Accepted Answer

We can consider to create an 'exceptions' OU. For AWS accounts (not at bucket level) that requires exception, we can place them in this OU. For more details, refers to: https://docs.aws.amazon.com/whitepapers/latest/organizing-your-aws-environment/exceptions-ou.html

Answer

Using the standard Control Tower control, unfortunately no there isn't. The best option would be to use a similar control (it's a Cloudformation guard rule). But define it yourself to have the exceptions required, following the guidance here: https://docs.aws.amazon.com/cfn-guard/latest/ug/writing-rules.html

As this is a CloudFormation guard rule, it's a proactive control, so will run against Cloudformation stacks when processes try to deploy them.

[CT.S3.PR.1] Require an Amazon S3 bucket to have block public access settings configured

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