Reference Guide

Security | 829
Figure 42-266. Client-based SSH Authentication
Troubleshooting SSH
• You may not bind id_rsa.pub to RSA authentication while logged in via the console. In this case,
Message 37 appears.
• Host-based authentication must be enabled on the server (Dell Force10system) and the client (Unix
machine). Message 38 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).
• If the IP address in the RSA key does not match the IP address from which you attempt to log in,
Message 39 appears. In this case, verify that the name and IP address of the client is contained in the
file /etc/hosts.
Telnet
To use Telnet with SSH, you must first enable SSH, as described above.
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.
Use the [
no] ip telnet server enable command to enable or disable the Telnet daemon.
Message 37 RSA Authentication Error
%Error: No username set for this term.
Message 38 Host-based Authentication Error
permission denied (host based)
Message 39 RSA Authentication Error
getname info 8 failed
FTOS#ssh 10.16.127.201 ?
-l User name option
-p SSH server port option (default 22)
-v SSH protocol version
FTOS(conf)#ip telnet server enable
FTOS(conf)#no ip telnet server enable