S3 Put Public Access Block

Creates or modifies the PublicAccessBlock configuration for an Amazon S3 bucket. To use this operation, you must have the s3:PutBucketPublicAccessBlock permission. For more information about Amazon S3 permissions, see Specifying Permissions in a Policy. When Amazon S3 evaluates the PublicAccessBlock configuration for a bucket or an object, it checks the PublicAccessBlock configuration for both the bucket (or the bucket that contains the object) and the bucket owner's account. If the PublicAccessBlock configurations are different between the bucket and the account, Amazon S3 uses the most restrictive combination of the bucket-level and account-level settings. For more information about when Amazon S3 considers a bucket or an object public, see The Meaning of "Public". Related Resources GetPublicAccessBlock DeletePublicAccessBlock GetBucketPolicyStatus Using Amazon S3 Block Public Access.

External Documentation

To learn more, visit the AWS documentation.

Basic Parameters

Parameter	Description
AWS Region	Enter the desired AWS Region.If no Region is specified, and the requested service supports Regions, AWS routes the request to us-east-1 by default.
Block Public ACLs	Specifies whether Amazon S3 should block public access control lists (ACLs) for this bucket and objects in this bucket.Setting this element to TRUE causes the following behavior: PUT Bucket ACL and PUT Object ACL calls fail if the specified ACL is public. PUT Object calls fail if the request includes a public ACL. PUT Bucket calls fail if the request includes a public ACL.Enabling this setting doesn't affect existing policies or ACLs.
Block Public Policy	Specifies whether Amazon S3 should block public bucket policies for this bucket.Setting this element to TRUE causes Amazon S3 to reject calls to PUT Bucket policy if the specified bucket policy allows public access.Enabling this setting doesn't affect existing bucket policies.
Bucket	The name of the Amazon S3 bucket whose PublicAccessBlock configuration you want to set.
Expected Bucket Owner	The account ID of the expected bucket owner.If the bucket is owned by a different account, the request will fail with an HTTP 403 (Access Denied) error.
Ignore Public ACLs	Specifies whether Amazon S3 should ignore public ACLs for this bucket and objects in this bucket.Setting this element to TRUE causes Amazon S3 to ignore all public ACLs on this bucket and objects in this bucket.Enabling this setting doesn't affect the persistence of any existing ACLs and doesn't prevent new public ACLs from being set.
Restrict Public Buckets	Specifies whether Amazon S3 should restrict public bucket policies for this bucket.Setting this element to TRUE restricts access to this bucket to only AWS service principals and authorized users within this account if the bucket has a public policy.Enabling this setting doesn't affect previously stored bucket policies, except that public and cross-account access within any public bucket policy, including non-public delegation to specific accounts, is blocked.

Advanced Parameters

Parameter	Description
Disable XML To JSON Auto Convert	When checked, XML responses are not automatically converted into JSON format.

Workflow Library Example

Block S3 Bucket Access on Public Financial Information

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