Administrator Guide

The following example shows creating rhosts.
admin@Unix_client# ls
id_rsa id_rsa.pub rhosts shosts
admin@Unix_client# cat rhosts
10.16.127.201 admin
Using Client-Based SSH Authentication
To SSH from the chassis to the SSH client, use the following command.
If the SSH port is a non-default value, use the ip ssh server port number command to change the default port number. You may
only change the port number when SSH is disabled. Then use the -p option with the ssh command.
• SSH from the chassis to the SSH client.
ssh ip_address
DellEMC#ssh 10.16.127.201 ?
-c Encryption cipher to use (for v2 clients only)
-l User name option
-m HMAC algorithm to use (for v2 clients only)
-p SSH server port option (default 22)
-v SSH protocol version
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 EMC 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: 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
DellEMC(conf)#ip telnet server enable
DellEMC(conf)#no ip telnet server enable
VTY Line and Access-Class Configuration
Various methods are available to restrict VTY access in . These depend on which authentication scheme you use — line, local, or remote.
Table 84. VTY Access
Authentication Method VTY access-class support? Username access-class
support?
Remote authorization
support?
Line YES NO NO
Local NO YES NO
Security 691