AWS Transit Gateway allows us to connect VPCs together and acts as a central hub. Through Transit Gateway, we can configure one VPC with restricted internet access to allow communication between other isolated VPCs and the internet.
In this Cloud Lab, you’ll create three VPCs with only one VPC with public internet access. Then you'll create a Transit Gateway and connect it to each of the three VPCs. Finally, you’ll configure the route tables to allow internet access to two isolated VPCs through one VPC.
By the end of this Cloud Lab, you’ll develop an understanding of the potential of AWS Transit Gateway to connect multiple VPCs and secure your isolated VPCs by configuring their outbound internet access through the Transit Gateway.
The architecture diagram below shows the infrastructure you’ll build in this Cloud Lab:
