Internet Gateway
#13 · Level 1 · Core services · Networking basicsConcept
Section titled “Concept”An Internet Gateway is a VPC’s main gate, which connects the VPC to the internet. AWS runs and scales it, so you don’t need to worry about any servers for it. Only one Internet Gateway can be attached to a VPC. Attaching the gateway is not enough — the Subnet’s Route Table must have a route to it, and then that subnet becomes a public subnet. The server also needs a public IP address, and its Security Group must allow the traffic.
Simple example
Section titled “Simple example”The main gate of a walled-off area. Without the gate, nobody inside can go out, and nobody outside can come in.
Why it’s needed
Section titled “Why it’s needed”People on the internet need to use things like websites — so the VPC needs a gate.
Where it’s used
Section titled “Where it’s used”It is attached to a VPC, and a public subnet’s Route Table points the way to it.
Azure equivalent
Section titled “Azure equivalent”Azure doesn’t need a separate gate; giving a resource a Public IP lets it reach the internet from the VNet
Related
Section titled “Related”Learn more
Section titled “Learn more”For details and the latest information, see the official documentation: