2024-04-11 14:23:07 +00:00
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id: nat-gateway-use
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info:
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name: Managed NAT Gateway Usage
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author: princechaddha
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severity: medium
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description: |
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Ensure the use of Amazon Managed NAT Gateway for better availability and bandwidth in VPC networks instead of self-managed NAT instances.
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impact: |
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Using self-managed NAT instances can lead to single points of failure and potential bandwidth bottlenecks.
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remediation: |
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Replace NAT instances with Amazon Managed NAT Gateway to ensure high availability and scalability in your VPC network.
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reference:
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- https://docs.aws.amazon.com/vpc/latest/userguide/vpc-nat-gateway.html
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tags: cloud,devops,aws,amazon,vpc,aws-cloud-config
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variables:
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region: "us-east-1"
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flow: |
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code(1)
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for(let VPCIds of template.vpcid){
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set("vpc", VPCIds)
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code(2)
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}
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self-contained: true
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code:
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- engine:
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- sh
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- bash
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source: |
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aws ec2 describe-vpcs --region $region --query 'Vpcs[*].VpcId' --output json
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extractors:
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- type: json
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name: vpcid
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internal: true
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json:
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- '.[]'
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- engine:
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- sh
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- bash
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source: |
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aws ec2 describe-nat-gateways --region $region --filter "Name=vpc-id,Values=$vpc" "Name=state,Values=available" --query 'NatGateways'
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matchers:
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- type: word
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words:
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- "[]"
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extractors:
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- type: dsl
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dsl:
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- 'vpc + " VPC is not using Managed NAT Gateways"'
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2024-04-11 14:25:25 +00:00
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# digest: 4a0a00473045022100c0877797c85620a3b1a36e36908c96c828bcd0dc31d1b46eadfbad0cb57887cb0220322e780cb1d41741e04ff1fa0dfd2d35efe10a367c625bf3dfa3ef63c1297eb8:922c64590222798bb761d5b6d8e72950
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