# Restricting Bucket Access to a Specified Address

You can configure a bucket policy to authorize a specified address the permission to access the bucket. This example shows how to deny a client access whose source IP address is within the range of 114.115.1.0/24.

#### Procedure

1. In the bucket list, click the bucket to be operated. The Overview page of the bucket is displayed.
2. In the navigation pane on the left, click Permissions to go to the permission management page.
3. Choose Bucket Policies > Custom Bucket Policies.
4. Click Create Bucket Policy. The Create Bucket Policy dialog box is displayed.
5. Configure the parameters according to the following table:

   Table 1 Parameters for authorizing the permission to access a specified bucket
   Parameter | Value
   --- | ---
   Policy Mode | Customized
   Effect | Deny

   Principal

   - Include > Other account
   - If the account ID is set to *, the policy setting takes effect on all anonymous users.
   - Leave the user ID blank.

   Resources

   - Include
   - Leave the field blank, indicating the policy takes effect on the entire bucket.

   Actions

   - Include
   - Select the asterisk (*), indicating all actions are involved.

   Conditions

   - Conditional Operator: IpAddress
   - Key: SourceIP
   - Value: 114.115.1.0/24

6. Click OK.

#### 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.

Parent topic: Application Cases