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Smart Cabinet Distribution Unit Advanced Operations • 51

Installation and Operations Manual

SSH

Secure Shell (SSH) version 2 enables secure network terminal sessions between a Sentry Remote

Power Manager and a remote user over insecure network. SSH provides 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 Sentry for configuration and power management, the SSH session may 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: A restart of the Sentry is required after setting or changing ANY SSH configurations. See Performing a warm

boot on page 39 for more information.

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 Smart 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 may be changed using the Set SSH Port command.

To change the SSH port:

At the Smart CDU: prompt, type set ssh port, followed by the port number and press Enter.

Example

The following changes the SSH port number to 65535:

Smart 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

Sentry SSH server supports two authentication methods for security and validation: Password and

Keyboard-Interactive.

For more information on SSH authentication methods, see

Enabling or disabling SSH server authentication

methods:

on page 16.

To enable the SSH authentication methods:

At the Smart 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:

Smart CDU: set ssh authmethod kbint enabled<Enter>

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