This assumes you have already configured the aws command line tool. If not, check out my article on Getting Started with the AWS CLI.

An S3 Bucket is similar to a Linux Samba share in that it is a mountable storage volume.

The aws s3api list-buckets command can be used to list your S3 buckets.

~]$ aws s3api list-buckets
{
    "Buckets": [
        {
            "Name": "my-bucket-abcdefg",
            "CreationDate": "2023-06-02T02:22:19+00:00"
        }
    ],
    "Owner": {
        "DisplayName": "john.doe",
        "ID": "ab0e0a411234d5103a77c82240d5abcdc41ff11cc325c65b5c777a5123443743"
    }
}

The aws s3api get-public-access-block​ command can be used to determine if the S3 Bucket has a public access block. In this example, the S3 Bucket does have a public access block which means that public access to the S3 Bucket is disabled.

~]$ aws s3api get-public-access-block --bucket my-bucket-abcdefg
{
    "PublicAccessBlockConfiguration": {
        "BlockPublicAcls": true,
        "IgnorePublicAcls": true,
        "BlockPublicPolicy": true,
        "RestrictPublicBuckets": true
    }
}

The aws s3api delete-public-access-block command can be used to remove the public access block from the S3 Bucket.

aws s3api delete-public-access-block --bucket my-bucket-abcdefg

And then you can confirm that the Public Access Blocks are set to false.

~]$ aws s3api get-public-access-block --bucket my-bucket-abcdefg
{
    "PublicAccessBlockConfiguration": {
        "BlockPublicAcls": false,
        "IgnorePublicAcls": false,
        "BlockPublicPolicy": false,
        "RestrictPublicBuckets": false
    }
}