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Azure Role-Based Access Control (RBAC)

  • A role-based access control service to manage user’s access to Azure resources including what they can do with those resources and what areas they can access.
  • It is an authorization system based on Azure Resource Manager, which provides fine-grained access management of Azure resources.

Concepts

  • A role assignment is composed of security principal, role definition, and scope.
    • Security Principal – an object representing a user, group, service principal, and managed identity that requests access to Azure resources.
    • Role Definition – a list of permissions that can be performed, such as read, write and delete.
    • Scope – set of resources to which access applies.
  • Attaching a role definition to a user, group, service principal, and managed identity to grant access to a particular scope is called role assignment.
  • You can attach multiple role assignments since RBAC is an additive model.
  • Azure RBAC supports both allow and deny assignments.

Roles

  • Classic subscription administrator roles have full access to an Azure subscription.
    • Account Administrator
      • You can only have 1 Account Administrator per Azure account.
      • This role is the billing owner of the Azure subscription.
      • It can manage subscriptions and billings in the account.
      • Create and cancel subscriptions.
    • Service Administrator
      • For this role, you can only have 1 Service Administrator per Azure subscription.
      • For new subscriptions, the Account Administrator is also the Service Administrator. This role has full access to the Azure portal.
      • It can assign users with a Co-Administrator role.
    • Co-Administrator
      • You can only create 200 Co-Administrator per Azure subscription.
      • This role has the same privileges as the Service Administrator, but it can’t change the association of subscriptions to Azure directories.
      • A user with this role can only assign a Co-Administrator role to other users.
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  • Azure Roles – Azure RBAC has over 70 built-in roles. The following are the four fundamental Azure roles:
    • Owner 
      • Full access to all Azure resources.
      • Delegate access to other users.
    • Contributor
      • Create and manage all types of resources in Azure.
      • The role can create a new tenant in Azure AD.
      • It cannot grant access to other users.
    • Reader
      • A user with this role can only view Azure resources.
    • User Access Administrator
      • It has permissions to manage user access to all types of resources.
  • Azure AD Roles – Provide access to manage Azure AD resources in a directory such as create users, assign administrative roles to others, manage licenses, reset passwords, and manage domains.
    • Global Administrator
      • This role can manage access to all the administrative features in Azure AD.
      • It can assign administrator roles to the users in your organization.
      • Reset the password of users and administrators in the account.
    • User Administrator
      • Create and manage different types of users and groups in Azure.
      • Manage support tickets and monitor service health.
      • This role can only change the passwords of users and administrators.
    • Billing Administrator
      • Make purchases in Azure.
      • The role can also monitor service health.
      • Manage subscriptions and support tickets.

Azure Roles

Azure AD Roles

Manage access to Azure resources.

Manage access to Azure Active Directory (Active AD) resources.

It supports custom roles.

It supports custom roles.

The scope can be specified at multiple levels (management group, subscription, resource group, resource).

The scope is only at the tenant level.

Role information can be accessed through Azure Portal, CLI, PowerShell, Resource Manager templates, and REST APIs.

Role information can be accessed through Azure Admin Portal, Microsoft 365 Admin Center, Microsoft Graph, and Azure AD PowerShell.

 

Best Practices

  • Use Azure RBAC to segregate duties within your team and only grant the access your users need.
  • Limit the number of subscription owners (max of 3) to reduce the potential for breach by a compromised owner.
  • You can use Azure AD PIM to protect privileged accounts from malicious cyber-attacks.

Validate Your Knowledge

Question 1

Question Type: Multiple-choice

Your company has an Azure subscription named ManilaSubscription that contains multiple virtual machines.

The subscription has a user named ManilaUser01 which has the following roles:

  • Backup Reader

  • Storage Blob Data Contributor

  • DevTest Labs User

You need to ensure that ManilaUser01 can assign a Reader role to all the users in the subscription.

What role should you assign?

  1. Assign the User Access Administrator role.
  2. Assign the Security Reader role.
  3. Assign the Virtual Machine Contributor role.
  4. Assign the Security Admin role.

Correct Answer: 1

Azure RBAC is an authorization system built on Azure Resource Manager that provides fine-grained access management of Azure resources. Access management for cloud resources is a critical function for any organization that is using the cloud. Azure role-based access control (Azure RBAC) helps you manage who has access to Azure resources, what they can do with those resources, and what areas they have access to.

The four fundamental Azure roles are Owner, Contributor, Reader, and User Access Administrator. To assign a Reader role to all the users in the Azure subscription, you must grant the user a User Access Administrator role. This role allows you to manage user access to the Azure resources.

Hence, the correct answer is: Assign the User Access Administrator role.

The option that says: Assign the Security Reader role is incorrect because this role only allows the user to view permissions in the Security Center.

The option that says: Assign the Virtual Machine Contributor role is incorrect because this role just lets you manage virtual machines. Take note that this role doesn’t allow you to access virtual machines directly nor assign a Reader role to all the users in the subscription.

The option that says: Assign the Security Admin role is incorrect. This role has the same permissions as the Security Reader role. The only difference is that, it can update the security policy and dismiss alerts and recommendations.

References:
https://docs.microsoft.com/en-us/azure/role-based-access-control/rbac-and-directory-admin-roles
https://docs.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#user-access-administrator

Tutorials Dojo Study Guide and Cheatsheet

Note: This question was extracted from our AZ-104 Microsoft Azure Administrator Practice Exams.

For more Azure practice exam questions with detailed explanations, check out the Tutorials Dojo Portal:

Microsoft Azure Practice Exams Tutorials Dojo

Sources:
https://docs.microsoft.com/en-us/azure/role-based-access-control/overview

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