s3-sample-policy-001.json

{
    "Version": "2012-10-17",
    "Id": "Policy1234567890123",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": "*",
            "Action": [
                "s3:GetObject"
            ],
            "Resource": [
                "arn:aws:s3:::my-public-bucket/contents/*"
            ]
        },
        {
            "Effect": "Deny",
            "Principal": "*",
            "Action": [
                "s3:*"
            ],
            "Resource": [
                "arn:aws:s3:::my-public-bucket/contents/admin/*"
            ],
            "Condition": {
                "NotIpAddress": {
                    "aws:SourceIp": ["x.x.x.x/32", "y.y.y.y/32"]
                }
            }
        }
    ]
}

PublicになっているS3上のコンテンツに対して、一部IP制限をかけるためのバケットポリシー。