CLOUD / A CONCEPT NOTE
AWS PrivateLink
private connections without public internet
Overview · mechanism
pitfall · examples
01 / THE SHORT VERSION
The idea in a few sentences.
Exposes services inside one VPC to another VPC privately using AWS's internal network backbone. Traffic never touches the public internet or requires IGWs.
02 / FOLLOW THE MECHANISM
How private routing flows
Endpoint Service
provider associates Network Load Balancer (NLB) with PrivateLink service.
VPC Endpoint
consumer creates interface endpoint inside target private subnet.
ENI Allocation
allocates a private IP address in consumer subnets mapped to service.
Direct Routing
traffic reaches provider NLB privately using AWS network routing backbone.
04 / COMMAND NOTES
Read the command, then the result.
Inspect the flags and arguments before trying an example. Snippets can need local setup, replacement values, or resources in your own environment.
provision interface endpoint
aws ec2 create-vpc-endpoint --vpc-endpoint-type Interface --service-name com.amazonaws.us-east-1.s305 / CHECK YOURSELF
Could you explain AWS PrivateLink to a teammate?
Try it out loud in two sentences: what it is, and the one detail that changes the picture. If you stall, the gap is the part to reread.
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