Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.14.1.0 - Page 789

47 Security This chapter describes several ways to provide security to the Dell EMC Networking system. For details about all the commands described in this chapter, refer to the Security chapter in the Dell EMC 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 • Support for Change of Authorization and Disconnect Messages packets • Role-Based Access Control • Two Factor Authentication (2FA) • Configuring the System to Drop Certain ICMP Reply Messages 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 EMC 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) • Suppressing AAA Accounting for Null Username Sessions (optional) • Configuring Accounting of EXEC and Privilege-Level Command Usage (optional) • Configuring AAA Accounting for Terminal Lines (optional) • Monitoring AAA Accounting (optional) Security 789