Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 813

49 Security This chapter describes several ways to provide access security to the Dell Networking system. For details about all the commands described in this chapter, refer to the Security chapter in the Dell Networking OS Command Reference Guide. Topics: • Role-Based Access Control • AAA Accounting • AAA Authentication • AAA Authorization • RADIUS • TACACS+ • Protection from TCP Tiny and Overlapping Fragment Attacks • Enabling SCP and SSH • Telnet • VTY Line and Access-Class Configuration 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 section contains the following sections: • Overview of RBAC • Privilege-or-role Mode versus Role-only Mode • Configuring Role-based Only AAA Authorization • System-Defined RBAC User Roles • User Roles • Role Accounting • AAA Authentication and Authorization for Roles • Display Information About User Roles 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 Security 813