put-public-access-block¶

Description¶

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 .

Warning

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

Synopsis¶

  put-public-access-block
--bucket <value>
[--content-md5 <value>]
[--checksum-algorithm <value>]
--public-access-block-configuration <value>
[--expected-bucket-owner <value>]
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]

Options¶

--bucket (string)

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

--content-md5 (string)

The MD5 hash of the PutPublicAccessBlock request body.

For requests made using the Amazon Web Services Command Line Interface (CLI) or Amazon Web Services SDKs, this field is calculated automatically.

--checksum-algorithm (string)

Indicates the algorithm used to create the checksum for the object when using the SDK. This header will not provide any additional functionality if not using the SDK. When sending this header, there must be a corresponding x-amz-checksum or x-amz-trailer header sent. Otherwise, Amazon S3 fails the request with the HTTP status code 400 Bad Request . For more information, see Checking object integrity in the Amazon S3 User Guide .

If you provide an individual checksum, Amazon S3 ignores any provided ChecksumAlgorithm parameter.

Possible values:

CRC32

CRC32C

SHA1

SHA256

--public-access-block-configuration (structure)

The PublicAccessBlock configuration that you want to apply to this Amazon S3 bucket. You can enable the configuration options in any combination. For more information about when Amazon S3 considers a bucket or object public, see The Meaning of “Public” in the Amazon S3 User Guide .

BlockPublicAcls -> (boolean)

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.

IgnorePublicAcls -> (boolean)

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.

BlockPublicPolicy -> (boolean)

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.

RestrictPublicBuckets -> (boolean)

Specifies whether Amazon S3 should restrict public bucket policies for this bucket. Setting this element to TRUE restricts access to this bucket to only Amazon Web 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.

Shorthand Syntax:

BlockPublicAcls=boolean,IgnorePublicAcls=boolean,BlockPublicPolicy=boolean,RestrictPublicBuckets=boolean

JSON Syntax:

{
  "BlockPublicAcls": true|false,
  "IgnorePublicAcls": true|false,
  "BlockPublicPolicy": true|false,
  "RestrictPublicBuckets": true|false
}

--expected-bucket-owner (string)

The account ID of the expected bucket owner. If the bucket is owned by a different account, the request fails with the HTTP status code 403 Forbidden (access denied).

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See ‘aws help’ for descriptions of global parameters.

Examples¶

To set the block public access configuration for a bucket

The following put-public-access-block example sets a restrictive block public access configuration for the specified bucket.

aws s3api put-public-access-block \
    --bucket my-bucket \
    --public-access-block-configuration "BlockPublicAcls=true,IgnorePublicAcls=true,BlockPublicPolicy=true,RestrictPublicBuckets=true"

This command produces no output.

Output¶

None

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