Administrator Guide

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 Conguration

• Two Factor Authentication (2FA)

• Conguring the System to Drop Certain ICMP Reply Messages

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

• Conguring Role-based Only AAA Authorization

• System-Dened 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.

868 Security