Azure RBAC is Role-based Access Control it is the gateway for any access (access management of Azure resources) and this service will help you to manage the access and to know who has access and what is kind of access he should take it.
How RBAC Works
Based on the above diagram we have some steps for access:
Security principal it is just an object for anything asking for access like (User, Group or service) after that when the security principle ask for access it is directly going for Role assignment and this is a group of access and role definition and scope or we can say a collection of permissions and it is defined into two thing Role definition and SCOPE, Role definition inside it we have multiple of rules like (owner, contributor, Managed Application) and many other Rules, inside each Rule, we have a list of permissions related to this Rule and for each permission, we can define two things (actions and Nonactions) What he should do and what he shouldn’t do
e.g. you can find below some of the Rules if we selected for example Contributor Rule you will find one it lists of access and permissions
So, what is scope: With a scope, we can assign assess for the user on a specific azure resource at this time the system will know what is the services that this user should use it.
Final scenario for access
when the user tries to access the Azure Services the Security principal once Entered the Active directory will ask the Role assignment What is the Role definition for this user and from the Role definition, we will get the list of access of this user and what is the actions allowed to this user to do it and what is the actions not allowed to this user to do it and from the Scope, we will get the list of azure resource that user has access on it, at this time the system will know what the azure resource allowed for this user and what is the actions he allowed and not allowed to do it, the combination of the Role Definition + Scope = RBAC.
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