Telnet; Vty Line And Access-Class Configuration; Vty Line Local Authentication And Authorization - Dell Force10 Z9000 Configuration Manual

If the IP address in the RSA key does not match the IP address from which you attempt to log in, the following message appears. In
this case, verify that the name and IP address of the client is contained in the file /etc/hosts: RSA Authentication Error.

Telnet

To use Telnet with SSH, first enable SSH, as previously described.
By default, the Telnet daemon is enabled. If you want to disable the Telnet daemon, use the following command, or disable Telnet in
the startup config. To enable or disable the Telnet daemon, use the [no] ip telnet server enable command.
Example of Using Telnet for Remote Login
Dell(conf)#ip telnet server enable
Dell(conf)#no ip telnet server enable

VTY Line and Access-Class Configuration

Various methods are available to restrict VTY access in Dell Networking OS. These depend on which authentication scheme you use
— line, local, or remote.
Table 48. VTY Access
Authentication Method
Line
Local
TACACS+
RADIUS
Dell Networking OS provides several ways to configure access classes for VTY lines, including:
•

VTY Line Local Authentication and Authorization

• VTY Line Remote Authentication and Authorization
VTY Line Local Authentication and Authorization
Dell Networking OS retrieves the access class from the local database.
To use this feature:
1. Create a username.
2. Enter a password.
3. Assign an access class.
4. Enter a privilege level.
You can assign line authentication on a per-VTY basis; it is a simple password authentication, using an access-class as authorization.
Configure local authentication globally and configure access classes on a per-user basis.
Dell Networking OS can assign different access classes to different users by username. Until users attempt to log in, Dell Networking
OS does not know if they will be assigned a VTY line. This means that incoming users always see a login prompt even if you have
excluded them from the VTY line with a deny-all access class. After users identify themselves, Dell Networking OS retrieves the
access class from the local database and applies it. (Dell Networking OS then can close the connection if a user is denied access.)
NOTE: If a VTY user logs in with RADIUS authentication, the privilege level is applied from the RADIUS server only if you
configure RADIUS authentication.
VTY access-class support?
YES
NO
YES
YES
Username access-class
support?
NO
YES
NO
NO
Remote authorization
support?
NO
NO
YES (with Dell Networking OS
version 5.2.1.0 and later)
YES (with Dell Networking OS
version 6.1.1.0 and later)
Security
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