Private network CLB is used to distribute requests from Tencent Cloud's private network. It doesn't have a public IP and cannot communicate with the public network. If you need to use a private network CLB instance and want it to communicate with the public network, you can bind it to an EIP for public network access.
Note:
The feature of binding an EIP to a private network CLB instance is in beta testing. To try it out, please submit a ticket. Use Limits
Region limits
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.
Feature limits
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 CLB purchase page.
2. Specify the following CLB configuration items as needed. For more information about the configuration, see Purchase Methods.
|
Billing Mode | Select the Pay-as-You-Go mode. |
Region | Select a region. For more information about the regions supported by CLB, see Region List. |
Instance Type | Only CLB instance type is supported. |
Network Type | Select the Public network type. |
EIP | Select EIP. Tencent Cloud will assign you an EIP and a private network CLB instance. Supported EIP 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 CLB console and click Instance management in the left sidebar. 2. Select a region in the top-left corner of the Instance management page, select the target private network CLB instance in the instance list, and choose More > Bind EIP in the Operation column on the right.
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.
Note:
The accelerated IPs and static single-line IPs are in beta testing. To try them out, please submit a ticket. 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.
References
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