Managing bucket permissions for IP addresses or ranges of IP

Reviewed on 28 May 2021 • Published on 18 May 2021

You can stipulate which IP addresses or IP ranges have access or permission to perform S3 operations on your buckets by creating a bucket policy with the IpAddress or NotIpAddress conditions.

It is possible to Allow actions for a specific IP address or range of IPs, using the IpAddress condition and the aws:SourceIp condition key.

Note:

The aws:SourceIp IPv4 and IPv6 values use the standard CIDR notation. For IPv6, we support using double colon (::) to represent strings of 0.

Requirements:

You have an account and are logged into the Scaleway Console - You have configured your API keys
You have created an Object Storage bucket

In the example below, we allow the 192.0.2.0/24 IP range to perform the s3:ListBucket and s3:GetObject actions.

Note:

Replace the example IP addresses before applying your bucket policy or you might lose access to your bucket.

{
  "Version": "2012-10-17",
  "Id": "MyBucketPolicy",
  "Statement": [
    {
      "Sid": "Grant List and GET from my instances",
      "Effect": "Allow",
      "Principal": "*",
      "Action": ["s3:ListBucket", "s3:GetObject"],
      "Resource": ["<BUCKET_NAME>", "<BUCKET_NAME>/*"],
      "Condition": {
        "IpAddress": {
          "aws:SourceIp": "198.51.100.0/24"
        }
      }
    }
  ]
}

You can have the same result if you Deny actions for IP addresses specified under the NotIpAddress condition:

{
  "Version": "2012-10-17",
  "Id": "MyBucketPolicy",
  "Statement": [
    {
      "Sid": "Grant List and GET from my instances",
      "Effect": "Deny",
      "Principal": "*",
      "Action": ["s3:ListBucket", "s3:GetObject"],
      "Resource": ["<BUCKET_NAME>", "<BUCKET_NAME>/*"],
      "Condition": {
        "NotIpAddress": {
          "aws:SourceIp": "198.51.100.0/24"
        }
      }
    }
  ]
}

Alternatively, you can block certain IP addresses or IP address ranges from performing actions on your bucket. You can also use NotIpAddress with the Allow Effect:

{
  "Version": "2012-10-17",
  "Id": "MyBucketPolicy",
  "Statement": [
    {
      "Sid": "Grant List and GET from my instances",
      "Effect": "Allow",
      "Principal": "*",
      "Action": ["s3:ListBucket", "s3:GetObject"],
      "Resource": ["<BUCKET_NAME>", "<BUCKET_NAME>/*"],
      "Condition": {
        "NotIpAddress": {
          "aws:SourceIp": "2001:db8::/32"
        }
      }
    }
  ]
}

Or the Deny effect paired with the IpAddress condition:

{
  "Version": "2012-10-17",
  "Id": "MyBucketPolicy",
  "Statement": [
    {
      "Sid": "Grant List and GET from my instances",
      "Effect": "Deny",
      "Principal": "*",
      "Action": ["s3:ListBucket", "s3:GetObject"],
      "Resource": ["<BUCKET_NAME>", "<BUCKET_NAME>/*"],
      "Condition": {
        "IpAddress": {
          "aws:SourceIp": "2001:db8::/32"
        }
      }
    }
  ]
}

Note:

Bucket policies use a JSON-based access policy language. You can find more details on the S3 Object Storage - JSON Policy Grammar documentation page.