Dell PowerConnect 5548 User Guide - Page 29

Due to the complexity of 802.1x setup and configuration, many mistakes can be made that might cause loss of connectivity or incorrect behavior. The 802.1x Monitor mode enables applying 802.1x functionality to the switch, with all necessary RADIUS and/or domain servers active, without actually taking any action that may cause unexpected behavior. In this way, the user can test the 802.1x setup before actually applying it. For more information, see "RADIUS" on page 284. SSH Secure Shell (SSH) is a protocol that provides a secure, remote connection to a device. SSH version 2 is currently supported. The SSH server feature enables an SSH client to establish a secure, encrypted connection with a device. This connection provides functionality that is similar to an inbound telnet connection. SSH uses RSA and DSA Public Key cryptography for device connections and authentication. For more information, see "Security Management and Password Configuration" on page 71. TACACS+ TACACS+ provides centralized security for validation of users accessing the device. TACACS+ provides a centralized, user management system, while still retaining consistency with RADIUS and other authentication processes. For more information, see "TACACS+" on page 275. Password Management Password management provides increased network security and improved password control. Passwords for SSH, Telnet, HTTP, HTTPS, and SNMP access are assigned security features. For more information, see "Password Management" on page 279. The switch provides the ability to demand strong passwords, meaning that they must contain both upper and lower-case letters, numbers, and punctuation marks. For more information, see "Password Management" on page 279. Dell PowerConnect 55xx Systems User Guide 29