Concept Guide

ip ssh rsa-authentication enable
5 Install user’s public key for RSA authentication in SSH.
EXEC Privilege Mode
ip ssh rsa-authentication username username my-authorized-keys flash://public_key
If you provide the username, the Dell EMC Networking OS installs the public key for that specic user. In case, no user is associated
with the current logged-in session, the system displays the following error message.
NOTE: If no user is associated with the current logged-in session, the system displays the following error message. %
Error: No username set for this term.
Example of Generating RSA Keys
admin@Unix_client#ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/admin/.ssh/id_rsa):
/home/admin/.ssh/id_rsa already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/admin/.ssh/id_rsa.
Your public key has been saved in /home/admin/.ssh/id_rsa.pub.
Conguring Host-Based SSH Authentication
Authenticate a particular host. This method uses SSH version 2.
To congure host-based authentication, use the following commands.
1 Congure RSA Authentication. Refer to Using RSA Authentication of SSH.
2 Create shosts by copying the public RSA key to the le shosts in the directory .ssh, and write the IP address of the host to the le.
cp /etc/ssh/ssh_host_rsa_key.pub /.ssh/shosts
Refer to the rst example.
3 Create a list of IP addresses and usernames that are permitted to SSH in a le called rhosts.
Refer to the second example.
4 Copy the le shosts and rhosts to the Dell EMC Networking system.
5 Disable password authentication and RSA authentication, if congured
CONFIGURATION mode or EXEC Privilege mode
no ip ssh password-authentication or no ip ssh rsa-authentication
6 Enable host-based authentication.
CONFIGURATION mode
ip ssh hostbased-authentication enable
7 Bind shosts and rhosts to host-based authentication.
CONFIGURATION mode
ip ssh pub-key-file flash://filename or ip ssh rhostsfile flash://filename
Examples of Creating shosts and rhosts
The following example shows creating shosts.
admin@Unix_client# cd /etc/ssh
admin@Unix_client# ls
moduli sshd_config ssh_host_dsa_key.pub ssh_host_key.pub
780
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