APC AP9290 Manuel D’Utilisation

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The Secure SHell (SSH) protocol provides a secure mechanism to access 
computer consoles or shells remotely. The protocol authenticates the server 
(in this case, the VCPS) and encrypts all transmissions between the SSH 
client and the server.

• SSH is an alternative to Telnet, which does not provide encryption.

• SSH protects the username and password, the credentials for 

authentication, from anyone intercepting network traffic.

• To authenticate the SSH server (the VCPS) to the SSH client, SSH 

uses a host key that is unique to the SSH server and that provides an 
identification that cannot be falsified. Therefore, an invalid server on 
the network cannot obtain a user name and password from a user by 
presenting itself as a valid server.

• The VCPS supports versions 1 and 2 of SSH.

• If you enable SSH, you should disable Telnet for a higher level of 

security for your system.

• The interface, user accounts, and user access rights are the same 

whether you access the control console through SSH or Telnet.

Secure CoPy (SCP) is a secure file transfer application that you can use 
instead of FTP. SCP uses the SSH protocol as the underlying transport 
protocol for encryption of user names, passwords, and files.

• When you enable and configure SSH, you automatically enable and 

configure SCP. No further configuration of SCP is needed.

• If you enabled SSH and SCP, you should disable FTP for a higher level 

of security for your system.

For information on supported SSH client applications, see