Network misconfigurations

Amazon EMR cluster’s master node with public IP

Compliance Frameworks
  • AWS Foundational Security Best Practices Controls
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  • ISO 27701
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  • mpa
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  • NIST 800-171
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  • NIST 800-53
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  • UK Cyber Essentials


EMR, Elastic MapReduce, is a managed cluster platform that simplifies running big data frameworks. EMR cluster is a collection of Amazon Elastic Compute Cloud (Amazon EC2) instances. Each instance in the cluster is called a node. The master node manages the cluster and coordinates the distribution of data and tasks among other nodes for processing. Master node {AwsEmrInstance} has an associated public IP address. Although it allows to create a secure access using SSH tunnel, associating the master node with public IP address directly and not within a VPC or a private subnet that has IPv4 does not stand with security best practices.