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cipher-list-: Enter a space-delimited list of ciphers the SSH Client supports.
The following ciphers are available.
● 3des-cbc
● aes128-cbc
● aes192-cbc
● aes256-cbc
● aes128-ctr
● aes192-ctr
● aes256-ctr
The default cipher list is in the given order: aes256-ctr, aes256-cbc, aes192-ctr, aes192-cbc, aes128-ctr, aes128-cbc, 3des-cbc.
Example of Configuring a Cipher List
The following example shows you how to configure a cipher list.
DellEMC(conf)#ip ssh cipher aes128-ctr aes128-cbc 3des-cbc
Troubleshooting SSH
To troubleshoot SSH, use the following information.
You may not bind id_rsa.pub to RSA authentication while logged in via the console. In this case, this message displays:%Error:
No username set for this term.
Enable host-based authentication on the server (Dell Networking system) and the client (Unix machine). The following message
appears if you attempt to log in via SSH and host-based is disabled on the client. In this case, verify that host-based
authentication is set to “Yes” in the file ssh_config (root permission is required to edit this file): permission denied (host
based).
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: getname info 8
failed.
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 methods depend on which authentication
scheme you use — line, local, or remote.
Table 77. VTY Access
Authentication Method VTY access-class support? Username access-class
support?
Remote authorization
support?
Line YES NO NO
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