| Plugin Title | Open Hadoop HDFS NameNode Metadata Service |
| Cloud | AWS |
| Category | EC2 |
| Description | Determine if TCP port 8020 for HDFS NameNode metadata service is open to the public |
| More Info | While some ports such as HTTP and HTTPS are required to be open to the public to function properly, more sensitive services such as Hadoop/HDFS should be restricted to known IP addresses. |
| AWS Link | http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/authorizing-access-to-an-instance.html |
| Recommended Action | Restrict TCP port 8020 to known IP addresses for Hadoop/HDFS |