# Bucket policy examples

### Grant public read-only access to a bucket

ใช้ policy นี้สำหรับอนุญาตให้ read-only ข้อมูลใน bucket เท่านั้น

```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "PublicReadOnlyAccess",
      "Effect": "Allow",
      "Principal": "*",
      "Action": "s3:GetObject",
      "Resource": "arn:aws:s3:::my-public-bucket/*"
    }
  ]
}
```

### Deny public access to a bucket

ใช้ policy นี้สำหรับไม่อนุญาตให้เข้าถึง bucket

```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "DenyPublicAccess",
      "Effect": "Deny",
      "Principal": "*",
      "Action": "s3:*",
      "Resource": ["arn:aws:s3:::my-private-bucket", "arn:aws:s3:::my-private-bucket/*"]
    }
  ]
}
```

### Allow access from a specific IP range

ใช้ policy นี้สำหรับเข้าถึง bucket ที่ user เชื่อมต่อจาก IP Address ที่กำหนด

```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowAccessFromIP",
      "Effect": "Allow",
      "Principal": "*",
      "Action": "s3:GetObject",
      "Resource": "arn:aws:s3:::my-secure-bucket/*",
      "Condition": {
        "IpAddress": {
          "aws:SourceIp": "192.168.1.0/24"
        }
      }
    }
  ]
}
```

### Grant access to another S3 user

ใช้ policy นี้สำหรับอนุญาต user S3 อื่นๆ ให้เข้าถึง bucket

```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowAccountUpload",
      "Effect": "Allow",
      "Principal": {
        "AWS": "arn:aws:iam::4de50c40e0254e8d987470bfb84980a1:862871b203ca9580"
      },
      "Action": "s3:PutObject",
      "Resource": "arn:aws:s3:::my-shared-bucket/*"
    }
  ]
}
```

### Allow access to a specific folder

ใช้ policy นี้สำหรับให้สิทธ์การเข้าถึง bucket ได้เฉพาะ path

```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowFolderAccess",
      "Effect": "Allow",
      "Principal": "*",
      "Action": "s3:GetObject",
      "Resource": "arn:aws:s3:::my-bucket/folder1/*"
    }
  ]
}
```

### Restrict access to objects within a specific path

ใช้ policy นี้สำหรับอนุญาตให้ user สามารถแสดงรายของข้อมูลใน bucket ได้ แต่ไม่สามารถเข้าถึง bucket

```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowListSpecificPrefix",
      "Effect": "Allow",
      "Principal": {
        "AWS": "arn:aws:iam::4de50c40e0254e8d987470bfb84980a1:862871b203ca9580"
      },
      "Action": "s3:ListBucket",
      "Resource": "arn:aws:s3:::my-bucket",
      "Condition": {
        "StringEquals": {
          "s3:prefix": "my-folder/"
        }
      }
    },
    {
      "Sid": "AllowGetSpecificFolder",
      "Effect": "Allow",
      "Principal": {
        "AWS": "arn:aws:iam::4de50c40e0254e8d987470bfb84980a1:862871b203ca9580"
      },
      "Action": "s3:GetObject",
      "Resource": "arn:aws:s3:::my-bucket/my-folder/*"
    }
  ]
}
```

### Require a minimum TLS version

ใช้ policy นี้สำหรับไม่อนุญาตให้อัพโหลดข้อมูลใน bucket

```
{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Deny",
            "Principal": "*",
            "Action": "s3:PutObject",
            "Resource": [
                "arn:aws:s3:::my-bucket",
                "arn:aws:s3:::my-bucket/*"
            ],
            "Condition": {
                "NumericLessThan": {
                    "s3:TlsVersion": 1.2
                }
            }
        }
    ]
}
```

### Prevent deletion of objects

ใช้ policy นี้สำหรับป้องกัน bucket ที่มีข้อมูลสำคัญ และไม่อนุญาตให้ลบข้อมูลได้

```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "DenyObjectDeletion",
      "Effect": "Deny",
      "Principal": "*",
      "Action": "s3:DeleteObject",
      "Resource": "arn:aws:s3:::my-bucket/*"
    }
  ]
}
```


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