Avocent DSView 3 Guide de l'utilisateur télécharger pdf (Page 72)

66 DSView Installer/User Guide

In Plain Text mode, all data is sent unencrypted to the DS appliance. When

Plain Text mode is used, any Telnet application that supports VT52, VT100,

VT100+, VT102, VT220, VT320 or ASCII terminal emulation may be used to

access the DS appliance.

In SSL mode, all data sent to the device during the DSView Telnet session is

DES encrypted. The DS appliance supports anonymous Diffie-Hellman key

exchange. The exchange of certificates for authentication is not supported.

When SSL mode is used, only the built-in DSView Telnet application may be

used to access the DS appliance. The ports on a DS appliance have the same

security property as the device.

The security property is set in DSView and in the DS appliance from the Com-

mand Line Interface (CLI). When you initiate access to a DS appliance or port

via Telnet from DSView, DSView attempts to read the security property directly

from the DS appliance.

If the SSL property has not been enabled on the DS appliance, and DSView

receives confirmation from the DS appliance, DSView will automatically open

its built-in Telnet application and you will be prompted for a DS appliance

username and password.

After that information has been entered, an SSL connection to the DS appliance

is established over TCP port 8192. When that connection is established, the DS

appliance validates the user’s access privileges and port availability. In this case,

the Telnet property screen in DSView for that DS appliance will automatically be

set to SSL values, even if they previously held Plain Text mode values. The

property screen will be disabled, and you will not be allowed to change any of its

values. The DSView database will be updated with the information read from

the DS appliance.

If DSView does not receive a reply from the DS appliance, it will use the secu-

rity mode settings in the DSView database. In this case, the Telnet property

screen in DSView for that DS appliance will show the database values, and you

will be able to change them.

Setting the security property

The security property that is set when a DS appliance is added to the DSView

database depends on the method being used to add the device.

If the Run New Device Install wizard method is used, you are prompted to

select the security mode. It should match the DS appliance Server Security

Mode value that was set via the DS appliance CLI.

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Avocent DSView 3 Guide de l'utilisateur Page 72