If you select Do Not Use EIP when you apply for an ECS, your ECS will be unable to access the Internet of Things (IoT) and cannot be accessed by the Internet. You can manage ECSs only through remote login to the Console.

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If the IPv4 address information of an ECS contains only an Intranet address and no a public address, it indicates that no EIP is bound to the ECS.

You can subscribe to an EIP and bind it to an ECS to enable the ECS to access resources on the Internet. If an enterprise’s applications are deployed on the ECS, the ECS can be accessed by the Internet through the EIP to provide end users of the enterprise with services.

In the scenario where ECSs need to access each other across regions, you can also bind an EIP to each ECS to enable the ECSs to access the Internet and achieve the mutual access via the Internet.

Steps to subscribe to an EIP and attach it to an ECS:

Log in to the network Console and click Apply for EIP .
Set basic information about an EIP, for example, region and name. The region must be the same as that of the ECS. It is recommended that the billing mode of the EIP is the same as that of the ECS.
Select the quantity of ECSs required to access the Internet. Here given that only one ECS needs to access the Internet, select 1 for the quantity.
Click Next and complete the order according to prompts.
Find the EIP that is newly purchased from the list in the Console and click Bind .
Select One-to-One Mapping .
On the pop-up, select an ECS to bind and click OK .

After an EIP is bound to the ECS or ELB, the EIP will show Boundstatus in the list on the Console.

Go back to the ECS Console. You can see that the EIP newly bound has been added to the IPv4 information column of the ECS.
Log in to the ECS and its network status shows Connected . You can access https://www.esurfingcloud.com by using the browser and find you have successful access to the Internet.

Elastic IP

Enable an ECS to Access the Internet through EIP