Using a Public NAT Gateway and VPC Peering to Enable Communications Between VPCs and the Internet
Two VPCs, VPC A and VPC B are in the same region. A public NAT gateway is configured for subnet A in VPC A and you can add SNAT and DNAT rules for Internet connectivity. Subnet B connects to subnet A through a VPC peering connection and uses the public NAT gateway of subnet A to communicate with the Internet.