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On this page

Permissions Management

Updated on 2025-01-10 GMT+08:00

You can use Identity and Access Management (IAM) to manage NAT Gateway permissions and control access to your resources. IAM provides identity authentication, permissions management, and access control.

With IAM, you can create IAM users and assign permissions to control their access to specific resources. For example, you can create IAM users for software developers and assign specific permissions to allow them to use NAT Gateway resources but prevent them from being able to delete resources or perform any high-risk operations.

If your account does not require individual IAM users for permissions management, you can skip this section.

IAM is a free service. You only pay for the resources in your account. For more information about IAM, see Identity and Access Management User Guide.

NAT Gateway Permissions

New IAM users do not have any permissions assigned by default. You need to first add them to one or more groups and attach policies or roles to these groups. The users then inherit permissions from the groups and can perform specified operations on cloud services based on the permissions they have been assigned.

NAT Gateway is a project-level service deployed and accessed in specific physical regions. When assigning NAT Gateway permissions to a user group, specify region-specific projects where the permissions will take effect. If you select All projects, the permissions will be granted for all region-specific projects. When accessing NAT Gateway, the users need to switch to a region where they have been authorized to use this service.

You can grant users permissions by using roles and policies.

  • Roles: A type of coarse-grained authorization mechanism that provides only a limited number of service-level roles. Cloud services depend on each other. When using roles to grant permissions, you also need to assign dependency roles. However, roles are not an ideal choice for fine-grained authorization and secure access control.
  • Policies: A type of fine-grained authorization mechanism that defines permissions required to perform operations on specific cloud resources under certain conditions. This mechanism allows for more flexible policy-based authorization for more secure access control. For example, the account administrator can grant users only permission to manage a certain type of NAT gateways and SNAT rules. Most policies define permissions based on APIs. For the API actions supported by NAT Gateway, see section "Permissions Policies and Supported Actions" in the NAT Gateway API Reference.
Table 1 lists all the system-defined roles and policies supported by NAT Gateway.
Table 1 System-defined roles and policies supported by NAT Gateway

Policy Name

Description

Type

NAT FullAccess

All operations on NAT Gateway resources.

System-defined policy

NAT ReadOnlyAccess

Read-only permissions for all NAT Gateway resources.

System-defined policy

NAT Administrator

All operations on NAT Gateway resources. To be granted this permission, users must also have the Tenant Guest permissions.

System-defined role

Table 2 lists the common operations supported by each NAT Gateway system policy or role. Select the policies or roles as required.

Table 2 Common operations supported by each system-defined policy or role of NAT Gateway

Operation

NAT FullAccess

NAT ReadOnlyAccess

NAT Gateway Administrator

Creating a NAT gateway

x

Querying NAT gateways

Querying NAT gateway details

Updating a NAT gateway

x

Deleting a NAT gateway

x

Adding an SNAT rule

x

Viewing an SNAT rule

Modifying an SNAT rule

x

Deleting an SNAT rule

x

Adding a DNAT rule

x

Viewing a DNAT rule

Modifying a DNAT rule

x

Deleting a DNAT rule

x

Creating a transit subnet

x

Querying transit subnets

Querying details of a transit subnet

Modifying a transit subnet

x

Deleting a transit subnet

x

Assigning a transit IP address

x

Querying a transit IP address

Releasing a transit IP address

x

NOTE:
  • Note the following when creating a DNAT rule:
    • If you set Instance Type to Server and select an ECS, you also need to obtain the ECS ReadOnlyAccess permissions or the fine-grained permissions for actions ecs:cloudServers:get and ecs:cloudServers:list. For details, see the Elastic Cloud Server API Reference.
    • If you set Instance Type to Server and select a BMS, you also need to obtain the BMS ReadOnlyAccess permissions or the fine-grained permissions for actions bms:servers:get and bms:servers:list. For details, see the Bare Metal Server API Reference.
    • If you create a DNAT rule on a private NAT gateway and select Load balancer for Instance Type, you need to obtain the ELB ReadOnlyAccess permissions or the fine-grained permissions for actions elb:loadbalancers:get and elb:loadbalancers:list. For details, see the Elastic Load Balance API Reference.
    • After a DNAT rule is created, add a security group rule to allow the Internet to access servers for which the DNAT rule is configured. Otherwise, the DNAT rule does not take effect. Obtain the VPC FullAccess permissions or the fine-grained permissions for action vpc:securityGroups:create by referring to the Virtual Private Cloud API Reference.
  • To view metrics, obtain the CES ReadOnlyAccess permissions. For details, see the Cloud Eye API Reference.
  • To view access logs, obtain the LTS ReadOnlyAccess permissions. For details, see the Log Tank Service API Reference.

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