VPC Peering

Jan 1, 0001

Definition

VPC Peering is a networking connection between two Virtual Private Clouds (VPCs) that enables traffic routing between them using private IP addresses. This connection allows resources in different VPCs to communicate as if they were within the same network, without the need for an internet gateway, VPN, or separate physical hardware. VPC Peering is commonly used to facilitate secure and efficient communication between different environments, such as development and production, or between different accounts within the same organization.

Secure Settings Example

resource "aws_vpc_peering_connection" "example" {
  vpc_id        = "vpc-12345678"
  peer_vpc_id   = "vpc-87654321"
  auto_accept   = false

  tags = {
    Name = "example-vpc-peering"
  }
}

resource "aws_vpc_peering_connection_accepter" "example" {
  vpc_peering_connection_id = aws_vpc_peering_connection.example.id
  auto_accept               = false

  tags = {
    Name = "example-vpc-peering-accepter"
  }
}

Insecure Settings Example

resource "aws_vpc_peering_connection" "insecure_example" {
  vpc_id        = "vpc-12345678"
  peer_vpc_id   = "vpc-87654321"
  auto_accept   = true  # Automatically accepting peering requests can lead to unauthorized access

  tags = {
    Name = "insecure-vpc-peering"
  }
}