Cloud Enterprise Network:Manage access to PrivateZone

Limits

• On-premises networks associated with an IPsec-VPN connection can use only Enterprise Edition transit routers to access PrivateZone.

• If a VBR is connected to a Basic Edition transit router, the on-premises networks connected to the VBR can use only the Basic Edition transit router and VPC in the same region as the VBR to access PrivateZone. The on-premises networks cannot access PrivateZone across regions.

  For example, a VBR is deployed in the China (Beijing) region. In this case, the on-premises networks connected to the VBR can use only the Basic Edition transit router and VPC in the China (Beijing) region to access PrivateZone.

Prerequisites

• PrivateZone is deployed. For more information, see Getting Started.

• The VPC of PrivateZone, and the VBR, IPsec-VPN connection, or CCN instance that is connected to the on-premises network are connected to the transit router. For more information, see Connect VPCs, Connect VBRs, Attach an IPsec-VPN connection to a transit router, or Associate a CCN instance with a transit router.

  If the on-premises network needs to access PrivateZone across region, create an inter-region connection between the transit routers in the regions. For more information, see Manage inter-region connections.

• If your on-premises network uses a CCN instance to connect to Alibaba Cloud, and the CCN instance and the VPC or transit router belong to different Alibaba Cloud accounts, you must grant the required permissions to the CCN instance. For more information, see Authorize CCN instances to use the PrivateZone service.

Use an Enterprise Edition transit router to enable access to PrivateZone

Enable access to PrivateZone

1. Log on to the CEN console.

2. On the Instances page, click the ID of the CEN instance that you want to manage.

3. On the Basic Settings > Transit Router tab, click the ID of the transit router in the region of the VPC in which PrivateZone is deployed.

4. On the details page of the transit router, click the Route Table tab.

5. On the Route Table tab, click the ID of the route table that you want to manage in the left-side list. In the Route Table Details section, click the Route Entry tab, and then click Add Route Entry.

6. In the Add Route Entry dialog box, set the following parameters and click OK.

   Parameter	Description
   Route Table	By default, the current route table is selected.
   Transit Router	By default, the current transit router is selected.
   Name	Enter a name for the route entry.
   Destination CIDR	Enter the CIDR blocks of PrivateZone. PrivateZone uses 100.100.2.136/32 and 100.100.2.138/32 to provide services. Repeat this step to add all the two CIDR blocks to the route table of the transit router.
   Blackhole Route	Select whether to specify the route as a blackhole route. Valid values: Yes: specifies the route as a blackhole route. Traffic that matches the route is dropped. No: specifies that the route is not a blackhole route. In this case, you must specify a next hop for the route. No is selected in this example.
   Next Hop	Select a next hop. Select the ID of the VPC connection on the transit router.
   Description	Enter a description for the route entry.

Disable access to PrivateZone

1. Log on to the CEN console.

2. On the Instances page, click the ID of the CEN instance that you want to manage.

3. On the Basic Settings > Transit Router tab, click the ID of the transit router in the region of the VPC in which PrivateZone is deployed.

4. On the details page of the transit router, click the Route Table tab.

5. On the Route Table tab, click the route table that you want to manage in the left-side route table list. Then, click the Route Entry tab in the Route Table Details section, and find the route that points to PrivateZone.

6. Then, click Delete in the Actions column. In the Delete Route Entry message, click OK.

Enable access to PrivateZone from an Enterprise Edition transit router by calling API operations

You can use tools such as Alibaba Cloud SDKs (recommended), Alibaba Cloud CLI, Terraform, and Resource Orchestration Service (ROS) to call API operations to add and manage routes for an Enterprise Edition transit router. For more information, see the following API references:

• CreateTransitRouterRouteEntry: Adds a route to a route table of an Enterprise Edition transit router.

• DeleteTransitRouterRouteEntry: Removes a static route from a route table of an Enterprise Edition transit router.

Use a Basic Edition transit router to enable access to PrivateZone