VPC Peering Least Access Routes

MEDIUM

Source

CloudSploit

vpc-peering-least-access-routes

VPC Peering Least Access Routes

Ensures routing tables for VPC peering are least access.

Routing traffic to the entire peered VPC exposes all resources in that network. VPC peering routes should only allow access to the subnets that are actually needed.

Recommended Actions

Replace broad VPC peering routes with more specific destination CIDR blocks

Links

https://docs.aws.amazon.com/vpc/latest/peering/vpc-peering-routing.html

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