# NAT Gateway for HA

Use NAT gateways so that instances in a private subnet can connect to services outside your Virtual Private Cloud (VPC). External services cannot initiate a connection with these instances.

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See this [AWS Documentation](https://docs.aws.amazon.com/vpc/latest/userguide/vpc-nat-gateway.html) for more information on NAT Gateways.
{% endhint %}

## Enabling AWS NAT Gateway for HA

1. In the DuploCloud Portal, navigate to **Administrator** -> **Infrastructure**. The **Infrastructure** page displays.
2. Select the Infrastructure for which you want to enable NAT Gateway from the **Name** column.
3. Click the **Settings** tab.
4. Click **Add**. The **Infra - Set Custom Data** pane displays.
5. In the **Setting Name** field, select **Enable HA NAT Gateway** from the list box.
6. Select **Enable**.
7. Click **Set**.

<div align="left"><figure><img src="https://2471407984-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F68cb0s9ce5UIUKWPuYs8%2Fuploads%2F61wNvgunARuyqunm2Xae%2FAWS_infra_set_nat.png?alt=media&#x26;token=d1518f31-4502-4ecf-ba0a-3d5b0c241052" alt=""><figcaption><p><strong>Infra - Set Custom Data</strong> pane with <strong>Enable HA NAT Gateway</strong> setting</p></figcaption></figure></div>