https://aws.amazon.com/blogs/networking-and-content-delivery/deploy-centralized-traffic-filtering-using-aws-network-firewall/

https://aws.amazon.com/blogs/networking-and-content-delivery/deployment-models-for-aws-network-firewall/

https://docs.aws.amazon.com/vpc/latest/tgw/tgw-getting-started.html#step-test-tgw

https://aws.amazon.com/blogs/networking-and-content-delivery/building-an-egress-vpc-with-aws-transit-gateway-and-the-aws-cdk/

https://docs.aws.amazon.com/prescriptive-guidance/latest/inline-traffic-inspection-third-party-appliances/outbound-traffic-inspection-nat-gateway.html

https://docs.aws.amazon.com/vpc/latest/userguide/vpc-security-groups.html#AddRemoveRules

Transit Gateway Routing

https://docs.aws.amazon.com/vpc/latest/tgw/how-transit-gateways-work.html#tgw-routing-overview

https://docs.aws.amazon.com/vpc/latest/tgw/tgw-route-tables.html#enable-tgw-route-propagation

https://aws.amazon.com/blogs/networking-and-content-delivery/creating-a-single-internet-exit-point-from-multiple-vpcs-using-aws-transit-gateway/