Amazon VPC - Internet Gateways

• An Internet Gateway serves two purposes:

  • To provide a target in your vpc route tables for internet routable traffic.
  • To perform network address translation(NAT) for instances that have been assigned public IPv4 addresses.

• Internet Gateways must be created and then attached to a VPC, be added to a route table and then associated with the relevant subnets.

• No availability risk or bandwidth constraints.

• You cannot have multiple Internet Gateways in a VPC

• Egress-Only internet Gateway provides outbound Internet Access for IPv6 addressed instances.