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# 使用监控对 Amazon EBS 快照的封锁公开访问 EventBridge
<a name="block-public-access-snapshots-events"></a>

Amazon EBS 将发出与阻止公开访问快照相关的事件。您可以使用 Amazon Lambda 和 Amazon EventBridge 以编程方式处理事件通知。尽最大努力发出事件。有关更多信息，请参阅 [Amazon EventBridge 用户指南](https://docs.amazonaws.cn/eventbridge/latest/userguide/eb-what-is.html)。

系统将发出以下事件：
+ 在“阻止所有共享”模式下，启用阻止公开访问快照

  ```
  {
    "version": "0",
    "id": "{{01234567-0123-0123-0123-012345678901}}",
    "detail-type": "EBS Snapshot Block Public Access Enabled",
    "source": "aws.ec2",
    "account": "{{123456789012}}",
    "time": "{{2019-05-31T21:49:54Z}}",
    "region": "{{us-east-1}}",
    "detail": { 
      "SnapshotBlockPublicAccessState": "block-all-sharing",
      "message": "Block Public Access was successfully enabled in 'block-all-sharing' mode"
    }
  }
  ```
+ 在“阻止新共享”模式下，启用阻止公开访问快照

  ```
  {
    "version": "0",
    "id": "{{01234567-0123-0123-0123-012345678901}}",
    "detail-type": "EBS Snapshot Block Public Access Enabled",
    "source": "aws.ec2",
    "account": "{{123456789012}}",
    "time": "{{2019-05-31T21:49:54Z}}",
    "region": "{{us-east-1}}",
    "detail": { 
      "SnapshotBlockPublicAccessState": "block-new-sharing",
      "message": "Block Public Access was successfully enabled in 'block-new-sharing' mode"
    }
  }
  ```
+ 禁用阻止公开访问快照

  ```
  {
    "version": "0",
    "id": "{{01234567-0123-0123-0123-012345678901}}",
    "detail-type": "EBS Snapshot Block Public Access Disabled",
    "source": "aws.ec2",
    "account": "{{123456789012}}",
    "time": "{{2019-05-31T21:49:54Z}}",
    "region": "{{us-east-1}}",
    "detail": { 
      "SnapshotBlockPublicAccessState": "unblocked",
      "message": "Block Public Access was successfully disabled"
    }
  }
  ```