Telnet; Vty Line And Access-Class Configuration; Vty Line Local Authentication And Authorization - Dell S4820T 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.
The Telnet server or client is VRF-aware. You can enable a Telnet server or client to listen to a specific
VRF by using the vrf vrf-instance-name parameter in the telnet command. This capability
enables a Telent server or client to look up the correct routing table and establish a connection.
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 69. 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:
882
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