TOPIC CLOUD
AWS PrivateLink private connections without public internet
IN 10 SECONDS
Exposes services inside one VPC to another VPC privately using AWS's internal network backbone. Traffic never touches the public internet or requires IGWs.
GOTCHA PrivateLink is unidirectional; consumers can initiate connections to providers, but providers cannot initiate back.
HOW PRIVATE ROUTING FLOWS
01 Endpoint Service provider associates Network Load Balancer (NLB) with PrivateLink service.
02 VPC Endpoint consumer creates interface endpoint inside target private subnet.
03 ENI Allocation allocates a private IP address in consumer subnets mapped to service.
04 Direct Routing traffic reaches provider NLB privately using AWS network routing backbone.
POKE IT YOURSELF
aws ec2 create-vpc-endpoint --vpc-endpoint-type Interface --service-name com.amazonaws.us-east-1.s3 — provision interface endpoint
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