Dell S4048-ON, Configuration Manual

Page: 760 / 1039

Example of Configuring VTY Authorization Based on MAC ACL for the Line (Per MAC Address)
Dell(conf)#mac access-list standard sourcemac
Dell(config-std-mac)#permit 00:00:5e:00:01:01
Dell(config-std-mac)#deny any
Dell(conf)#
Dell(conf)#line vty 0 9
Dell(config-line-vty)#access-class sourcemac
Dell(config-line-vty)#end
Role-Based Access Control
With Role-Based Access Control (RBAC), access and authorization is controlled based on a user’s role. Users are granted
permissions based on their user roles, not on their individual user ID. User roles are created for job functions and through those roles
they acquire the permissions to perform their associated job function.
This chapter consists of the following sections:
• Overview
• Privilege-or-Role Mode Versus Role-only Mode
• Configuring Role-based Only AAA Authorization
• System-Defined RBAC User Roles
• Creating a New User Role
• Modifying Command Permissions for Roles
• Adding and Deleting Users from a Role
• Role Accounting
• Configuring AAA Authentication for Roles
• Configuring AAA Authorization for Roles
• Configuring an Accounting for Roles
• Applying an Accounting Method to a Role
• Displaying Active Accounting Sessions for Roles
• Configuring and RADIUS VSA Attributes for RBAC
• Displaying User Roles
• Displaying Accounting for User Roles
• Displaying Information About Roles Logged into the Switch
• Display Role Permissions Assigned to a Command
Overview of RBAC
With Role-Based Access Control (RBAC), access and authorization is controlled based on a user’s role. Users are granted
permissions based on their user roles, not on their individual user ID. User roles are created for job functions and through those roles
they acquire the permissions to perform their associated job function. Each user can be assigned only a single role. Many users can
have the same role.
The Dell Networking OS supports the constrained RBAC model. With a constrained RBAC model, you can inherit permissions when
you create a new user role, restrict or add commands a user can enter and the actions the user can perform. This allows for greater
flexibility in assigning permissions for each command to each role and as a result, it is easier and much more efficient to administer
user rights. If a user’s role matches one of the allowed user roles for that command, then command authorization is granted.
A constrained RBAC model provides for separation of duty and as a result, provides greater security than the hierarchical RBAC
model. Essentially, a constrained model puts some limitations around each role’s permissions to allow you to partition of tasks.
However, some inheritance is possible.
Default command permissions are based on CLI mode (such as configure, interface, router), any specific command settings, and the
permissions allowed by the privilege and role commands. The role command allows you to change permissions based on the role. You
760
Security