Preventing Specific IP Addresses from Accessing a Bucket

Scenario

This case describes how to restrict the source IP addresses that can access an OBS bucket. The following shows how to deny a client access whose source IP address is within the range of 114.115.1.0/24.

Recommended Configuration

Bucket policy

Procedure

1. In the navigation pane of OBS Console, choose Object Storage.
2. In the bucket list, click the bucket name you want to go to the Overview page.
3. In the navigation pane, choose Permissions.
4. On the Bucket Policies page, click Create Bucket Policy under Custom Bucket Policies.
5. Configure parameters for a bucket policy.
   Figure 1 Configuring parameters for a bucket policy
   

   Table 1 Parameters for creating a bucket policy

   Parameter	Description
   Policy Mode	Select Customized.
   Effect	Select Deny.
   Principal	Choose Include > Cloud service user. Account ID: Enter *, which indicates that the setting takes effect for all registered users and anonymous users. User ID: Leave the user ID blank.
   Resources	Select Include > Entire bucket.
   Actions	Include Action Name: Select *, which indicates all permissions.
   Conditions	Conditional Operator: IpAddress Key: Select SourceIp. Value: Set it to 114.115.1.0/24. NOTE: Use commas (,) to separate multiple IP addresses.

   

   If you want to allow clients whose IP addresses are outside the configured range to access your bucket, grant access permissions to anonymous users by referring to Granting Permissions to Anonymous Users.

6. Click OK. The bucket policy is created.

Verification

Initiate an access request from an IP address within the range of 114.115.1.0/24. The access is denied. Initiate an access request from an IP address outside the range of 114.115.1.0/24. The access is allowed.

Scenario

To allow only a specified IP address to access the OBS bucket, set Condition Operator to NotIpAddress and specify the allowed IP address as the Value.