Amazon Simple Storage Service
API Reference (API Version 2006-03-01)

PutPublicAccessBlock

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.

Important

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".

Request Syntax

PUT /?publicAccessBlock HTTP/1.1 Host: Bucket.s3.amazonaws.com Content-MD5: ContentMD5 <?xml version="1.0" encoding="UTF-8"?> <PublicAccessBlockConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <BlockPublicAcls>boolean</BlockPublicAcls> <IgnorePublicAcls>boolean</IgnorePublicAcls> <BlockPublicPolicy>boolean</BlockPublicPolicy> <RestrictPublicBuckets>boolean</RestrictPublicBuckets> </PublicAccessBlockConfiguration>

URI Request Parameters

The request requires the following URI parameters.

Bucket

The name of the Amazon S3 bucket whose PublicAccessBlock configuration you want to set.

Content-MD5

The MD5 hash of the PutPublicAccessBlock request body.

Request Body

The request accepts the following data in XML format.

PublicAccessBlockConfiguration

Root level tag for the PublicAccessBlockConfiguration parameters.

Required: Yes

BlockPublicAcls

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.

Type: Boolean

Required: No

BlockPublicPolicy

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.

Type: Boolean

Required: No

IgnorePublicAcls

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.

Type: Boolean

Required: No

RestrictPublicBuckets

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 services 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.

Type: Boolean

Required: No

Response Syntax

HTTP/1.1 200

Response Elements

If the action is successful, the service sends back an HTTP 200 response with an empty HTTP body.

Examples

First Sample Request

The following request puts a bucket PublicAccessBlock configuration that rejects public ACLs.

PUT /<bucket-name>?publicAccessBlock HTTP/1.1 Host: <bucket-name>.s3.amazonaws.com x-amz-date: <Thu, 15 Nov 2016 00:17:21 GMT> Authorization: <signatureValue> <?xml version="1.0" encoding="UTF-8"?> <PublicAccessBlockConfiguration> <BlockPublicAcls>TRUE</BlockPublicAcls> <IgnorePublicAcls>FALSE</IgnorePublicAcls> <BlockPublicPolicy>FALSE</BlockPublicPolicy> <RestrictPublicBuckets>FALSE</RestrictPublicBuckets> </PublicAccessBlockConfiguration>

First Sample Response

HTTP/1.1 200 OK x-amz-id-2: ITnGT1y4REXAMPLEPi4hklTXouTf0hccUjo0iCPEXAMPLEutBj3M7fPGlWO2SEWp x-amz-request-id: 51991EXAMPLE5321 Date: Thu, 15 Nov 2016 00:17:22 GMT Server: AmazonS3 Content-Length: 0

Second Sample Request

The following request puts a bucket PublicAccessBlock configuration that ignores public ACLs and restricts access to public buckets.

PUT /<bucket-name>?publicAccessBlock HTTP/1.1 Host: <bucket-name>.s3.amazonaws.com x-amz-date: <Thu, 15 Nov 2016 00:17:21 GMT> Authorization: <signatureValue> <?xml version="1.0" encoding="UTF-8"?> <PublicAccessBlockConfiguration> <BlockPublicAcls>FALSE</BlockPublicAcls> <IgnorePublicAcls>TRUE</IgnorePublicAcls> <BlockPublicPolicy>FALSE</BlockPublicPolicy> <RestrictPublicBuckets>TRUE</RestrictPublicBuckets> </PublicAccessBlockConfiguration>

Second Sample Response

HTTP/1.1 200 OK x-amz-id-2: ITnGT1y4REXAMPLEPi4hklTXouTf0hccUjo0iCPEXAMPLEutBj3M7fPGlWO2SEWp x-amz-request-id: 51991EXAMPLE5321 Date: Thu, 15 Nov 2016 00:17:22 GMT Server: AmazonS3 Content-Length: 0

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: