|
| 1 | +--- |
| 2 | +title: Set up inbound private endpoint for Azure API Management - Standard v2 |
| 3 | +description: Learn how to restrict inbound access to an Azure API Management instance by using an Azure private endpoint and Azure Private Link. |
| 4 | +ms.service: azure-api-management |
| 5 | +author: dlepow |
| 6 | +ms.author: danlep |
| 7 | +ms.topic: how-to |
| 8 | +ms.date: 09/19/2024 |
| 9 | +--- |
| 10 | + |
| 11 | +# Set up inbound private endpoint for Azure API Management - Standard v2 |
| 12 | + |
| 13 | +[!INCLUDE [standard-v2.md](../../includes/api-management-availability-standard-v2.md)] |
| 14 | + |
| 15 | +You can configure an inbound [private endpoint](../private-link/private-endpoint-overview.md) (preview) for your API Management Standard v2 instance to allow clients in your private network to securely access the API Management gateway over [Azure Private Link](../private-link/private-link-overview.md). |
| 16 | + |
| 17 | +* The private endpoint uses an IP address from an Azure virtual network in which it's hosted. |
| 18 | + |
| 19 | +* Network traffic between a client on your private network and API Management traverses over the virtual network and a Private Link on the Microsoft backbone network, eliminating exposure from the public internet. |
| 20 | + |
| 21 | +* Configure custom DNS settings or an Azure DNS private zone to map the API Management hostname to the endpoint's private IP address. |
| 22 | + |
| 23 | +:::image type="content" source="media/private-endpoint-v2-tiers/private-endpoint.png" alt-text="Diagram that shows a secure inbound connection to API Management using private endpoint."::: |
| 24 | + |
| 25 | +With a private endpoint and Private Link, you can: |
| 26 | + |
| 27 | +- Create multiple Private Link connections to an API Management instance. |
| 28 | + |
| 29 | +- Use the private endpoint to send inbound traffic on a secure connection. |
| 30 | + |
| 31 | +- Use policy to distinguish traffic that comes from the private endpoint. |
| 32 | + |
| 33 | +- Limit incoming traffic only to private endpoints, preventing data exfiltration. |
| 34 | + |
| 35 | +- Combine with outbound [virtual network integration](integrate-vnet-outbound.md) to provide end-to-end network isolation of your API Management clients and backend services. |
| 36 | + |
| 37 | + |
| 38 | +## Limitations |
| 39 | + |
| 40 | +* Only the API Management instance's Gateway endpoint supports inbound Private Link connections. |
| 41 | +* Each API Management instance supports at most 100 Private Link connections. |
| 42 | +* The **Network** blade for the API Management Standard v2 instance in the Azure portal currently doesn't support creation or management of private endpoints. |
| 43 | + |
| 44 | + As shown in this article, you create or manage private endpoint resources independently from the API Management instance. |
| 45 | + |
| 46 | +## Prerequisites |
| 47 | + |
| 48 | +- An existing API Management Standard v2 instance. [Create one if you haven't already](get-started-create-service-instance.md). |
| 49 | +- A virtual network containing a subnet to host the private endpoint. The subnet may contain other Azure resources. |
| 50 | +- (Recommended) A virtual machine in the same or a different subnet in the virtual network, to test the private endpoint. |
| 51 | +[!INCLUDE [azure-cli-prepare-your-environment-no-header.md](~/reusable-content/azure-cli/azure-cli-prepare-your-environment-no-header.md)] |
| 52 | + |
| 53 | +## Approval method for private endpoint |
| 54 | + |
| 55 | +Typically, a network administrator creates a private endpoint. Depending on your Azure role-based access control (RBAC) permissions, a private endpoint that you create is either *automatically approved* to send traffic to the API Management instance, or requires the resource owner to *manually approve* the connection. |
| 56 | + |
| 57 | + |
| 58 | +|Approval method |Minimum RBAC permissions | |
| 59 | +|---------|---------| |
| 60 | +|Automatic | `Microsoft.Network/virtualNetworks/**`<br/>`Microsoft.Network/virtualNetworks/subnets/**`<br/>`Microsoft.Network/privateEndpoints/**`<br/>`Microsoft.Network/networkinterfaces/**`<br/>`Microsoft.Network/locations/availablePrivateEndpointTypes/read`<br/>`Microsoft.ApiManagement/service/**`<br/>`Microsoft.ApiManagement/service/privateEndpointConnections/**` | |
| 61 | +|Manual | `Microsoft.Network/virtualNetworks/**`<br/>`Microsoft.Network/virtualNetworks/subnets/**`<br/>`Microsoft.Network/privateEndpoints/**`<br/>`Microsoft.Network/networkinterfaces/**`<br/>`Microsoft.Network/locations/availablePrivateEndpointTypes/read` | |
| 62 | + |
| 63 | +## Steps to configure private endpoint |
| 64 | + |
| 65 | +1. [Get available private endpoint types in subscription](#get-available-private-endpoint-types-in-subscription) |
| 66 | +1. [Create private endpoint - portal](#create-private-endpoint---portal) |
| 67 | +1. [List private endpoint connections to the instance](#list-private-endpoint-connections-to-the-instance) |
| 68 | +1. [Approve pending private endpoint connections](#approve-pending-private-endpoint-connections) |
| 69 | +1. [Optionally disable public network access](#optionally-disable-public-network-access) |
| 70 | + |
| 71 | +### Get available private endpoint types in subscription |
| 72 | + |
| 73 | +Verify that the API Management private endpoint type is available in your subscription and location. In the portal, find this information by going to the **Private Link Center**. Select **Supported resources**. |
| 74 | + |
| 75 | +You can also find this information by using the [Available Private Endpoint Types - List](/rest/api/virtualnetwork/available-private-endpoint-types) REST API. |
| 76 | + |
| 77 | +```rest |
| 78 | +GET https://management.azure.com/subscriptions/{subscriptionId}/providers/Microsoft.Network/locations/{region}/availablePrivateEndpointTypes?api-version=2021-03-01 |
| 79 | +``` |
| 80 | + |
| 81 | +Output should include the `Microsoft.ApiManagement.service` endpoint type: |
| 82 | + |
| 83 | +```JSON |
| 84 | +[...] |
| 85 | + |
| 86 | + "name": "Microsoft.ApiManagement.service", |
| 87 | + "id": "/subscriptions/{subscriptionId}/providers/Microsoft.Network/AvailablePrivateEndpointTypes/Microsoft.ApiManagement.service", |
| 88 | + "type": "Microsoft.Network/AvailablePrivateEndpointTypes", |
| 89 | + "resourceName": "Microsoft.ApiManagement/service", |
| 90 | + "displayName": "Microsoft.ApiManagement/service", |
| 91 | + "apiVersion": "2021-04-01-preview" |
| 92 | + } |
| 93 | +[...] |
| 94 | +``` |
| 95 | + |
| 96 | +### Create private endpoint - portal |
| 97 | + |
| 98 | +1. In the [Azure portal](https://portal.azure.com/), go to the **Private Link Center**. |
| 99 | + |
| 100 | +1. Select **Private endpoints** > **+ Create**. |
| 101 | + |
| 102 | +1. In the **Basics** tab of **Create a private endpoint**, enter or select the following information: |
| 103 | + |
| 104 | + | Setting | Value | |
| 105 | + | ------- | ----- | |
| 106 | + | **Project details** | | |
| 107 | + | Subscription | Select your subscription. | |
| 108 | + | Resource group | Select an existing resource group, or create a new one. It must be in the same region as your virtual network.| |
| 109 | + | **Instance details** | | |
| 110 | + | Name | Enter a name for the endpoint such as *myPrivateEndpoint*. | |
| 111 | + | Network Interface Name | Enter a name for the network interface, such as *myInterface* | |
| 112 | + | Region | Select a location for the private endpoint. It must be in the same region as your virtual network. It may differ from the region where your API Management instance is hosted. | |
| 113 | + |
| 114 | +1. Select the **Next: Resource** button at the bottom of the screen. The following information about your API Management instance is already populated: |
| 115 | + * Subscription |
| 116 | + * Resource type |
| 117 | + * Resource name |
| 118 | + |
| 119 | +1. In **Resource**, in **Target sub-resource**, select **Gateway**. |
| 120 | + |
| 121 | + :::image type="content" source="media/private-endpoint/create-private-endpoint.png" alt-text="Screenshot showing settings to create a private endpoint in the Azure portal."::: |
| 122 | + |
| 123 | + > [!IMPORTANT] |
| 124 | + > Only **Gateway** is supported for API Management. Other sub-resources aren't supported. |
| 125 | +
|
| 126 | +1. Select the **Next: Virtual Network** button at the bottom of the screen. |
| 127 | + |
| 128 | +1. In **Networking**, enter or select this information: |
| 129 | + |
| 130 | + | Setting | Value | |
| 131 | + | ------- | ----- | |
| 132 | + | Virtual network | Select your virtual network. | |
| 133 | + | Subnet | Select your subnet. | |
| 134 | + | Network policy for private endpoints | Leave the default of **Disabled**. | |
| 135 | + | Private IP configuration | In most cases, select **Dynamically allocate IP address.** | |
| 136 | + | Application security group | Optionally select an [application security group](../virtual-network/application-security-groups.md). | |
| 137 | + |
| 138 | +1. Select the **Next: DNS** button at the bottom of the screen. |
| 139 | + |
| 140 | +1. In **Private DNS integration**, enter or select this information: |
| 141 | + |
| 142 | + | Setting | Value | |
| 143 | + | ------- | ----- | |
| 144 | + | Integrate with private DNS zone | Leave the default of **Yes**. | |
| 145 | + | Subscription | Select your subscription. | |
| 146 | + | Resource group | Select your resource group. | |
| 147 | + | Private DNS zones | The default value is displayed: **(new) privatelink.azure-api.net**. |
| 148 | + |
| 149 | +1. Select the **Next: Tabs** button at the bottom of the screen. If you desire, enter tags to organize your Azure resources. |
| 150 | + |
| 151 | + 1. Select the **Next: Review + create** button at the bottom of the screen. |
| 152 | + |
| 153 | +1. Select **Create**. |
| 154 | + |
| 155 | +### List private endpoint connections |
| 156 | + |
| 157 | +After the private endpoint is created and the service updated, it appears in the list on the **Private endpoints** page in the **Private Link Center**. |
| 158 | + |
| 159 | +Confirm that the endpoint's **Connection status** is **Approved**. |
| 160 | + |
| 161 | +### Optionally disable public network access |
| 162 | + |
| 163 | +To optionally limit incoming traffic to the API Management instance only to private endpoints, disable public network access. |
| 164 | + |
| 165 | +> [!NOTE] |
| 166 | +> Disabling the public network access property only affects API Management instances configured with a private endpoint. |
| 167 | +
|
| 168 | +To disable public network access using the Azure CLI, run the following [az apim update](/cli/azure/apim#az-apim-update) command, substituting the names of your API Management instance and resource group: |
| 169 | + |
| 170 | +```azurecli |
| 171 | +az apim update --name my-apim-service --resource-group my-resource-group --public-network-access false |
| 172 | +``` |
| 173 | + |
| 174 | +You can also use the [API Management Service - Update](/rest/api/apimanagement/api-management-service/update) REST API to disable public network access, by setting the `publicNetworkAccess` property to `Disabled`. |
| 175 | + |
| 176 | +## Validate private endpoint connection |
| 177 | + |
| 178 | +After the private endpoint is created, confirm its DNS settings in the portal: |
| 179 | + |
| 180 | +1. In the **Private Link Center**, select **Private endpoints** <name of your private endpoint>. |
| 181 | + |
| 182 | +1. In the left-hand navigation, under **Settings**, select **DNS configuration**. |
| 183 | + |
| 184 | +1. Review the DNS records and IP address of the private endpoint. The IP address is a private address in the address space of the subnet where the private endpoint is configured. |
| 185 | + |
| 186 | +### Test in virtual network |
| 187 | + |
| 188 | +Connect to a virtual machine you set up in the virtual network. |
| 189 | + |
| 190 | +Run a utility such as `nslookup` or `dig` to look up the IP address of your default Gateway endpoint over Private Link. For example: |
| 191 | + |
| 192 | +``` |
| 193 | +nslookup my-apim-service.azure-api.net |
| 194 | +``` |
| 195 | + |
| 196 | +Output should include the private IP address associated with the private endpoint. |
| 197 | + |
| 198 | +API calls initiated within the virtual network to the default Gateway endpoint should succeed. |
| 199 | + |
| 200 | +### Test from internet |
| 201 | + |
| 202 | +From outside the private endpoint path, attempt to call the API Management instance's default Gateway endpoint. If public access is disabled, output includes an error with status code `403` and a message similar to: |
| 203 | + |
| 204 | +``` |
| 205 | +Request originated from client public IP address xxx.xxx.xxx.xxx, public network access on this 'Microsoft.ApiManagement/service/my-apim-service' is disabled. |
| 206 | + |
| 207 | +To connect to 'Microsoft.ApiManagement/service/my-apim-service', please use the Private Endpoint from inside your virtual network. |
| 208 | +``` |
| 209 | + |
| 210 | +## Related content |
| 211 | + |
| 212 | +* Use [policy expressions](api-management-policy-expressions.md#ref-context-request) with the `context.request` variable to identify traffic from the private endpoint. |
| 213 | +* Learn more about [private endpoints](../private-link/private-endpoint-overview.md) and [Private Link](../private-link/private-link-overview.md), including [Private Link pricing](https://azure.microsoft.com/pricing/details/private-link/). |
| 214 | +* [Manage private endpoint connections](../private-link/manage-private-endpoint.md). |
| 215 | +* [Troubleshoot Azure private endpoint connectivity problems](../private-link/troubleshoot-private-endpoint-connectivity.md). |
| 216 | + |
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