Telnet and secure shell (ssh), Telnet and, Secure shell (ssh) – Dell Managed PDU LED User Manual

Page 226: User’s guide

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USER’S GUIDE

Ma

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221

Telnet and Secure Shell (SSH)

While SSH is enabled, you cannot use Telnet to access the command line interface.
Enabling SSH enables SCP automatically.

To configure the options for Telnet and Secure Shell (SSH):

1. On the

Administration

tab of the Web interface, select

Network

on the top

menu bar, and select

access

under the

Console

heading on the left navigation

menu.

2. Configure the port settings for Telnet and SSH.

3. Under

Console

on the left navigation menu, select

ssh host key

, specify a

host key file previously created with the Rack PDU Security Wizard, and load it
to the Rack PDU.

If you do not specify a host key file here, if you install an invalid host key, or if you
enable SSH with no host key installed, the Rack PDU generates an RSA host key
of 2048 bits. For the Rack PDU to create a host key, it must reboot.

The Rack PDU

can take up to 1 minute to create this host key, and SSH is not accessible
during that time.

When SSH is enabled and its port is configured, no further configuration is
required to use Secure CoPy (SCP). SCP uses the same configuration as SSH.

To use SSH, you must have an SSH client installed. Most Linux and other
UNIX

®

platforms include an SSH client, but Microsoft

Windows operating

systems do not. SSH clients are available from various vendors.

For information on the extra security a non-standard port provides, see

Port assignments

.

Alternatively, from a command line interface such as the command
prompt on Windows operating systems, you can use FTP or Secure
CoPy (SCP) to transfer the host key file.

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