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To create a NAT gateway, you must specify a subnet and an Elastic IP address.

Ensure that the Elastic IP address is currently not associated with an instance or a network interface.

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If you no longer need a NAT gateway, you can delete it.

Deleting a NAT gateway disassociates its Elastic IP address, but does not release the address from your account.

When your instances send traffic to the internet (other than the Amazon S3 IP addresses), the traffic is sent to the NAT gateway.

You cannot route traffic to a NAT gateway through a VPC peering connection, a VPN connection, or AWS Direct Connect.

A NAT gateway cannot be used by resources on the other side of these connections.

You can use the Amazon VPC console to create, view, and delete a NAT gateway.If you delete a NAT gateway, the NAT gateway routes remain in a status until you delete or update the routes.For more information, see Adding and Removing Routes from a Route Table.The following diagram illustrates the architecture of a VPC with a NAT gateway.The main route table sends internet traffic from the instances in the private subnet to the NAT gateway.If you are migrating from a NAT instance to a NAT gateway and you want to reuse the NAT instance's Elastic IP address, you must first disassociate the address from your NAT instance.

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