Private Network Cloud Load Balancer is utilized for distributing requests originating from Tencent Cloud's private network, lacking a public IP and incapable of communicating with the public network. If you require using a Private Network Cloud Load Balancer and establish communication with the public network, you may opt to bind the Private Network Cloud Load Balancer to an Elastic Public IP, enabling public network access via the Elastic Public IP.
Limit
Region
Private network CLB instances are unavailable in Ji'nan, Fuzhou, Shijiazhuang, Wuhan, and Changsha regions. Therefore, this feature is not supported in these regions.
Product Attribute Limits
This feature is supported only for bill-by-IP accounts but not bill-by-CVM accounts.
This feature is supported only for CLB instances but not classic CLB instances.
This feature is supported only for private network CLB instances in VPCs but not in the classic network.
Functional limitations
Currently, private network CLB instances do not support port ranges.
A private network CLB instance can be bound to only an EIP that is in the same region as the CLB instance and not bound to other resources.
Each private network CLB instance can be bound to only one EIP.
After a private network CLB instance is bound to an EIP, its features will be similar to those of a public network CLB instance, but public network CLB cannot be split into private network CLB and EIP.
Security Group Limits
After a private network CLB instance is bound to an EIP, the security group of the instance takes effect for traffic from the instance but not from the EIP.
After a private network CLB instance is bound to an EIP and the "Allow by Default" feature is enabled in the security group of a backend CVM instance, the security group allows traffic from both the EIP and the CLB instance by default. That is, the security group does not take effect for both types of traffic. Therefore, we recommend not enabling the “Allow by Default” feature.
Directions
Method 1: Selecting an EIP when purchasing a CLB instance
1. Log in to the Tencent Cloud console and go to the Cloud Load Balancer purchase page.
2. Specify the following CLB configuration items as needed. For more information about the configuration, see Purchase Methods.
Parameter | Description |
Billing Method | Select the Pay-as-You-Go mode. |
Region | |
Instance type. | Only CLB instance type is supported. |
Network | Select the Public Network type. |
Elastic IP (EIP) | Select an Elastic Public IP, and Tencent Cloud will allocate an Elastic Public IP and a Private Network CLB for you. Supported Elastic Public IP types include: General IP, Accelerated IP, and Static Single-line IP. |
Method 2: Binding a private network CLB instance to an EIP
1. Log in to the Cloud Load Balancer console and click Instance management in the left sidebar.
2. In the upper left corner of the "Instance Management" page, select the region, then choose the target Private Network CLB instance from the instance list. In the "Actions" column on the right, select More > Bind Elastic Public IP.
3. In the pop-up window, select the EIP to be bound and click Submit to bind the EIP to the private network CLB instance.
4. (Optional) Select the target private network CLB instance in the instance list and choose More > Unbind EIP in the Operation column on the right to unbind the instance from the EIP.