APC AP7900 ユーザーズマニュアル

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 Switched Rack PDU) 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 being used by anyone intercepting network traffic.

• To authenticate the SSH server (the Switched Rack PDU) 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 Switched Rack PDU supports versions 1 and 2 of SSH. The 

encryption mechanisms of the versions differ, and each version has 
advantages. Version 1 provides faster login to the Rack PDU, and 
version 2 provides improved protection from attempts to intercept, 
forge, or change data that are transmitted.

• When you enable SSH, Telnet is automatically disabled.
• The interface, user accounts, and user access rights are the same 

whether you access the control console through SSH or Telnet.

To create a host key, see 

For information on supported SSH client applications, see 

.