A NAT gateway can be deployed across subnets and AZs, so that even if an AZ fails, the public NAT gateway in another AZ can still run normally. The specifications and EIP of a public NAT gateway can be changed at any time.
Multiple NAT gateway specifications are available. Public NAT gateways are stable, reliable and easy to configure and maintain.
Public NAT gateways translate private IP addresses into EIPs and vice versa. This allows servers to share an EIP to access the Internet or provide services accessible from the Internet. You no longer need to configure an EIP for each server, which saves money on EIPs and bandwidths.