What is a system policy?
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, Ga 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.
Service system policies
AliyunGlobalAccelerationFullAccess
The AliyunGlobalAccelerationFullAccess policy: Provides full access to Global Acceleration via Management Console. It can be attached to RAM identities.
AliyunGlobalAccelerationFullAccess
AliyunGlobalAccelerationReadOnlyAccess
The AliyunGlobalAccelerationReadOnlyAccess policy: Provides read-only access to Global Acceleration via Management Console. It can be attached to RAM identities.
Service-linked role policies
AliyunServiceRolePolicyForGaAlb
Ga assumes the AliyunServiceRolePolicyForGaAlb service-linked role to access the resources in other cloud services. The AliyunServiceRolePolicyForGaAlb policy is the dedicated authorization policy of the AliyunServiceRoleForGaAlb service-linked role. This policy is defined and used by Ga. You cannot modify or delete the policy. Do not attach this policy to a RAM identity other than the service-linked role.
AliyunServiceRolePolicyForGaAlb
AliyunServiceRolePolicyForGaAntiDdos
Ga assumes the AliyunServiceRolePolicyForGaAntiDdos service-linked role to access the resources in other cloud services. The AliyunServiceRolePolicyForGaAntiDdos policy is the dedicated authorization policy of the AliyunServiceRoleForGaAntiDdos service-linked role. This policy is defined and used by Ga. You cannot modify or delete the policy. Do not attach this policy to a RAM identity other than the service-linked role.
AliyunServiceRolePolicyForGaAntiDdos
AliyunServiceRolePolicyForGaCdt
Ga assumes the AliyunServiceRolePolicyForGaCdt service-linked role to access the resources in other cloud services. The AliyunServiceRolePolicyForGaCdt policy is the dedicated authorization policy of the AliyunServiceRoleForGaCdt service-linked role. This policy is defined and used by Ga. You cannot modify or delete the policy. Do not attach this policy to a RAM identity other than the service-linked role.
AliyunServiceRolePolicyForGaCdt
AliyunServiceRolePolicyForGaFlowlog
Ga assumes the AliyunServiceRolePolicyForGaFlowlog service-linked role to access the resources in other cloud services. The AliyunServiceRolePolicyForGaFlowlog policy is the dedicated authorization policy of the AliyunServiceRoleForGaFlowlog service-linked role. This policy is defined and used by Ga. You cannot modify or delete the policy. Do not attach this policy to a RAM identity other than the service-linked role.
AliyunServiceRolePolicyForGaFlowlog
AliyunServiceRolePolicyForGaNlb
Ga assumes the AliyunServiceRolePolicyForGaNlb service-linked role to access the resources in other cloud services. The AliyunServiceRolePolicyForGaNlb policy is the dedicated authorization policy of the AliyunServiceRoleForGaNlb service-linked role. This policy is defined and used by Ga. You cannot modify or delete the policy. Do not attach this policy to a RAM identity other than the service-linked role.
AliyunServiceRolePolicyForGaNlb
AliyunServiceRolePolicyForGaOss
Ga assumes the AliyunServiceRolePolicyForGaOss service-linked role to access the resources in other cloud services. The AliyunServiceRolePolicyForGaOss policy is the dedicated authorization policy of the AliyunServiceRoleForGaOss service-linked role. This policy is defined and used by Ga. You cannot modify or delete the policy. Do not attach this policy to a RAM identity other than the service-linked role.
AliyunServiceRolePolicyForGaOss
AliyunServiceRolePolicyForGaVpcEndpoint
Ga assumes the AliyunServiceRolePolicyForGaVpcEndpoint service-linked role to access the resources in other cloud services. The AliyunServiceRolePolicyForGaVpcEndpoint policy is the dedicated authorization policy of the AliyunServiceRoleForGaVpcEndpoint service-linked role. This policy is defined and used by Ga. You cannot modify or delete the policy. Do not attach this policy to a RAM identity other than the service-linked role.
References
By default, RAM identities do not have any permissions. RAM identities can access cloud resources within an Alibaba Cloud account only after an account administrator grants the required permissions to the RAM identities. To ensure resource security, we recommend that you grant only the required permissions to the RAM identities based on the principle of least privilege. For more information, see the following topics: