Specifications

Advanced Operations  83
Installation and Operations Manual
SSH
Secure Shell (SSH) version 2 enables secure network terminal sessions between a Remote Power
Manager and a remote user over insecure network. SSH provides an encrypted terminal sessions with
strong authentication of both the server and client, using public-key cryptography and is typically used
as a replacement for unencrypted Telnet. In addition to enabling secure network terminal sessions to the
unit for configuration and power management, the SSH session can be used for secure Pass-Thru
connections to attached devices.
SSH requires the configuration and use of a client agent on the client PC. There are many freeware,
shareware or for-purchase SSH clients available. Two examples are the freeware client PuTTY and the
for-purchase client SecureCRT by VanDyke Software. For configuration and use of these clients,
please refer to the applicable software documentation.
SSH Command Summary
Command Description
Set SSH Enables/disables SSH support
Set SSH AuthMethod Enables/disables the SSH server authentication methods
Set SSH Port Sets the SSH server port number
Enabling and Setting up SSH Support
NOTE: You will need to restart the PT22 after setting or changing any SSH configurations.
Enabling or disabling SSH support:
The Set SSH command is used to enable or disable SSH support.
To enable or disable SSH support:
At the Switched CDU: prompt, type set ssh, followed by enabled or disabled and press Enter.
Changing the SSH server port:
With SSH support enabled, the SSH server watches and responds to requests on the default SSH port
number 22. This port number can be changed using the Set SSH Port command.
To change the SSH port:
At the Switched CDU: prompt, type set ssh port, followed by the port number and press Enter.
Example
The following changes the SSH port number to 65535:
Switched CDU: set ssh port 65535<Enter>
Enabling or disabling SSH server authentication methods:
The Set SSH Authentication Method command is used to set the method of SSH server authentication. The
SSH server supports two authentication methods for security and validation: Password and Keyboard-
Interactive.
To enable the SSH authentication methods:
At the Switched CDU: prompt, type set ssh authmethod, followed by password or kbint, followed by
enabled or disabled, and press Enter.
Example
The following example sets the SSH authentication method to keyboard-interactive:
Switched CDU: set ssh authmethod kbint enabled<Enter>