Posted On: Feb 1, 2023

Starting today, you can configure your NAT Gateway to support up to 440,000 concurrent connections to a unique destination by adding multiple IP addresses to same NAT Gateway.

A NAT Gateway enables instances in a private subnet to connect to services outside the subnet using the IP address associated with the NAT Gateway. Prior to this launch, you could associate one IP address to your NAT Gateway which supports 55,000 concurrent connections to a unique destination. A unique destination is identified by a unique combination of destination IP address, the destination port, and the protocol (TCP/UDP/ICMP). This feature allows you to associate up to a total of eight IP addresses to further increase this limit by eight times to 440,000 concurrent connections to a single destination.

This feature is available in all AWS regions including AWS GovCloud (US) Regions. To learn more about VPC NAT Gateway and this feature, please visit our documentation.