This topic describes the system policies of Cloud Phone. You can use the information in this topic when you grant permissions on Cloud Phone to Resource Access Management (RAM) users.
A policy defines a set of permissions that are described based on the policy structure and syntax. You can use policies to describe the authorized resource sets, authorized operation sets, and authorization conditions. Alibaba Cloud Resource Access Management (RAM) provides system policies and custom policies. All system policies are created and updated by Alibaba Cloud. You can use system policies, but you cannot modify them. You can manage and update custom policies based on your business requirements. You can create, update, and delete custom policies. During service iteration, ECP adds new permissions to system policies to support new features and capabilities. The update of a system policy affects all RAM identities to which the policy is attached, including RAM users, RAM user groups, and RAM roles. For more information about RAM policies, see Policy overview.
System policies are designed for new users to quickly get started with Alibaba Cloud products on the management console, though they also enable the use of more advanced methods like API operations or CLI commands. If you are familiar with the advanced methods, we recommend that you use custom policies to implement finer-grained control on who is permitted to call what API operations, thereby improving security.
System policies can be classified into service system policies, service role policies, and service-linked role policies. Some cloud services provide only one or two of the three types of policies. For more information, see the policy types that are described in the following section.
System policies
AliyunECDFullAccess
You can assign the AliyunECDFullAccess policy to RAM users. This policy contains the permissions to manage cloud phones.
AliyunVPCFullAccess
Cloud phones depend on resources such as virtual private clouds (VPCs). Therefore, you must assign the AliyunVPCFullAccess policy to RAM users. This policy contains the permissions to manage virtual private clouds (VPCs).