An AWS Internet Gateway is a component that facilitates communication between instances within an Amazon Virtual Private Cloud (VPC) and the Internet. It acts as a gateway for internet-bound traffic, allowing resources within a VPC, like EC2 instances, to access the Internet and receive responses from Internet resources.
The following diagram from the Terraform, AWS, and Ansible together tutorial shows an Internet Gateway providing Internet connectivity to a VPC.
Internet Gateways are attached to a VPC and provide a target for traffic destined for public IP addresses or the internet. They enable bidirectional communication—allowing resources within the VPC to initiate outbound connections to the internet and also receive incoming responses from the internet.
For the Internet Gateway to route traffic, it has to be used as a routing destination for a Subnet or included in the default / main routing table for the whole VPC.
See tutorials using an Internet Gateway:
IT Wonder Lab tutorials are based on the diverse experience of Javier Ruiz, who founded and bootstrapped a SaaS company in the energy sector. His company, later acquired by a NASDAQ traded company, managed over €2 billion per year of electricity for prominent energy producers across Europe and America. Javier has over 25 years of experience in building and managing IT companies, developing cloud infrastructure, leading cross-functional teams, and transitioning his own company from on-premises, consulting, and custom software development to a successful SaaS model that scaled globally.
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