Users Guide

Security

This chapter describes several ways to provide 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:

• AAA Accounting

• AAA Authentication

• Obscuring Passwords and Keys

• 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

AAA Accounting

Accounting, authentication, and authorization (AAA) accounting is part of the AAA security model.

For details about commands related to AAA security, refer to the Security chapter in the Dell Networking OS

Command Reference Guide.

AAA accounting enables tracking of services that users are accessing and the amount of network resources

being consumed by those services. When you enable AAA accounting, the network server reports user activity

to the security server in the form of accounting records. Each accounting record comprises accounting

attribute/value (AV) pairs and is stored on the access control server.

As with authentication and authorization, you must configure AAA accounting by defining a named list of

accounting methods and then applying that list to various virtual terminal line (VTY) lines.

Configuration Task List for AAA Accounting

The following sections present the AAA accounting configuration tasks.

• Enabling AAA Accounting (mandatory)

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