PrivateLink

Jan 1, 0001

Definition

PrivateLink is a service provided by cloud providers like AWS that allows users to securely access services hosted on the cloud without exposing them to the public internet. It establishes a private connection between virtual private clouds (VPCs) and services, ensuring that data remains within the cloud provider’s network. This enhances security by reducing the attack surface and minimizing the risk of data exposure.

Secure Settings Example

# AWS CloudFormation example for setting up a VPC Endpoint for PrivateLink
Resources:
  MyVPCEndpoint:
    Type: "AWS::EC2::VPCEndpoint"
    Properties:
      VpcId: vpc-12345678
      ServiceName: com.amazonaws.us-west-2.s3
      VpcEndpointType: Interface
      PrivateDnsEnabled: true
      SecurityGroupIds:
        - sg-0123456789abcdef0
      SubnetIds:
        - subnet-0123456789abcdef0
        - subnet-abcdef0123456789

Insecure Settings Example

# AWS CloudFormation example with insecure settings for PrivateLink
Resources:
  MyVPCEndpoint:
    Type: "AWS::EC2::VPCEndpoint"
    Properties:
      VpcId: vpc-12345678
      ServiceName: com.amazonaws.us-west-2.s3
      VpcEndpointType: Interface
      # Missing PrivateDnsEnabled, which could lead to DNS resolution issues
      SecurityGroupIds:
        - sg-0123456789abcdef0
      SubnetIds:
        - subnet-0123456789abcdef0
        - subnet-abcdef0123456789