> ## Documentation Index
> Fetch the complete documentation index at: https://docs.megaport.com/llms.txt
> Use this file to discover all available pages before exploring further.

# NAT Gateway Cloud Connectivity Overview

> This help topic provides an overview of NAT Gateway cloud connectivity.

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Megaport NAT Gateway (NAT Gateway) provides virtual routing capabilities for on-demand private connectivity at Layer 3.

NAT Gateway is preconfigured in data centers in key routing zones around the world, enabling data transfer between:

* Multicloud and hybrid cloud environments
* Network service providers
* Cloud service providers

Without physical infrastructure, you can use cloud-to-cloud networking, private peering between leading public cloud, <Gloss term="IaaS" anchor="iaas" /> and <Gloss term="SaaS" anchor="saas" /> providers, and direct connectivity to any provider on the Megaport software-defined network (SDN). There is no need to own and maintain equipment and no IP address or autonomous system numbers to procure.

Click a Cloud Service Provider link in the site navigation to get started.

For more information about NAT Gateway, see [Megaport NAT Gateway Overview](/nat).

## Using a service key

You can create a service key that allows you to share your service with another Megaport account holder.
For more information, see [Setting up Service Keys](/marketplace/service-keys/).