The Egress-Only Internet Gateway
Explore how to create and manage an egress-only internet gateway in AWS VPC to enable outgoing internet access for IPv6 resources while blocking inbound traffic. Understand the setup steps, routing updates, and management commands to enhance your VPC networking and security.
Introduction
A NAT gateway works well to provide outgoing-only internet access to the private IPv4 resources, but what if we want the IPv6 resources to have outgoing-only internet access?
AWS IPv6 addresses are global unicast addresses and are publicly routable by default; therefore, there is no concept of private IPv6 addresses in AWS. We can use an egress-only internet gateway to allow outgoing-only internet access from an IPv6 resource while disregarding all incoming requests from the internet. ...