Dell Configuration Guide for the S4048–ON System 9.14.2.6

Using RSA Authentication of SSH

The following procedure authenticates an SSH client based on an RSA key using RSA authentication. This method uses SSH version 2.

1. On the SSH client (Unix machine), generate an RSA key, as shown in the following example.
2. Copy the public key id_rsa.pub to the Dell EMC Networking system.
3. Disable password authentication if enabled.
   CONFIGURATION mode
   no ip ssh password-authentication enable
4. Enable RSA authentication in SSH.
   CONFIGURATION Mode
   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 specific 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.

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.