Alcatel-Lucent 6850-48 Manuale Supplementare

Logging Into the Switch

Using Secure Shell

OmniSwitch AOS Release 6 Switch Management Guide

page 2-11

The OmniSwitch Secure Shell feature provides a secure mechanism that allows you to log in to a remote 
switch, to execute commands on a remote device, and to move files from one device to another. Secure 
Shell provides secure, encrypted communications even when your transmission is between two untrusted 
hosts or over an unsecure network. Secure Shell protects against a variety of security risks including the 
following:

• IP spoofing

• IP source routing

• DNS spoofing

• Interception of clear-text passwords and other data by intermediate hosts

• Manipulation of data by users on intermediate hosts

Note. The OmniSwitch supports Secure Shell Version 2 only.

The OmniSwitch includes both client and server components of the Secure Shell interface and the Secure 
Shell FTP file transfer protocol. SFTP is a subsystem of the Secure Shell protocol. All Secure Shell FTP 
data are encrypted through a Secure Shell channel. 

Since Secure Shell provides a secure session, the Secure Shell interface and SFTP are recommended 
instead of the Telnet program or the FTP protocol for communications over TCP/IP for sending file 
transfers. Both Telnet and FTP are available on the OmniSwitch but they do not support encrypted 
passwords. 

Note. Secure Shell may only be used to log into the switch to manage the switch. It cannot be used for 
Layer 2 authentication through

 

the switch.

The Secure Shell interface is invoked when you enter the 

 command, and the Secure Shellv6 interface 

is invoked by using the 

 command in an IPv6 environment. After the authentication process between 

the client and the server is complete, the remote Secure Shell interface runs in the same way as Telnet. 
Refer to 

 to for detailed information.

Secure Shell FTP is the standard file transfer protocol used with Secure Shell version 2. Secure Shell FTP 
is an interactive file transfer program (similar to the industry standard FTP) which performs all file 
transfer operations over a Secure Shell connection. 

You can invoke the Secure Shell FTP session by using the 

 command, and the SFTPv6 session by 

using the 

 command in an IPv6 environment. Once the authentication phase is complete, the Secure 

Shell FTP subsystem runs. Secure Shell FTP connects and logs into the specified host, then enters an