NAT Gateway

What is Azure NAT Gateway ? 

Azure NAT Gateway is a service that allows your private resources in Azure to access the internet without revealing their private IP addresses. It does this by translating the private IP addresses to a public IP address.

Imagine you have a bunch of computers in your house, and you want them to be able to access the internet. But you don't want to give each computer a public IP address, because that would be expensive and insecure.

Instead, you can use a NAT gateway. The NAT gateway sits between your computers and the internet, and it translates the private IP addresses of your computers to a single public IP address. This way, your computers can access the internet, but their private IP addresses are hidden from the world.

Azure NAT Gateway is a managed service, which means that Microsoft takes care of all the maintenance and updates for you. You just need to create a NAT gateway resource and associate it with a subnet. Once the NAT gateway is associated with a subnet, all of the resources in that subnet will be able to access the internet through the NAT gateway.

Here are some of the benefits of using Azure NAT Gateway:

  • Security: Azure NAT Gateway helps to improve the security of your Azure networks by hiding your private IP addresses from the internet. This makes it more difficult for attackers to target your resources.
  • Scalability: Azure NAT Gateway is a highly scalable service that can handle large volumes of traffic. This makes it a good choice for customers with large or growing networks.
  • Cost: Azure NAT Gateway can help you to reduce your costs by allowing you to use private IP addresses for your internal resources. This can save you money on public IP addresses, which are typically more expensive.

If you have any private resources in Azure that need to access the internet, Azure NAT Gateway is a good option to consider.


Nat Gateway cannot associated with

  • A load balancer with a Basic SKU
  • A public IP address with a Basic SKU
  • An IPv6 address space
  • An existing NAT gateway
  • A virtual network gateway

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