Dell S4048T User Manual

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)
48
Security 903

Dell S4048T Specifications

General

Switching Capacity	1.44 Tbps
Rack Units	1U
Form Factor	Rack-mountable
Power Device	Internal power supply
Power Redundancy	Optional
Product Type	Switch
Jumbo Frame Support	Yes
Routing Protocol	OSPF, BGP, RIP, VRRP, PIM-SM, IGMP
Remote Management Protocol	SNMP, RMON, Telnet, SSH
Features	Quality of Service (QoS), Jumbo Frames Support, Virtual Route Redundancy Protocol (VRRP), VLAN support, sFlow, Multiple Spanning Tree Protocol (MSTP), Rapid Spanning Tree Protocol (RSTP), IPv6 support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, IEEE 802.3ae
Dimensions (W x D x H)	17.3 in x 16 in x 1.7 in
Operating Temperature	0°C to 40 °C
Operating Humidity	10% to 90% (non-condensing)