Keys Authentication!

Keys Authentication!

Configure SSH server to login with Keys Authentication. It is needed for it to make private key for client and public key for server. [1]
Login as a user you'd like to configure for Keys Authentication.

[cent@ns ~]$ ssh-keygen -t rsa

Generating public/private rsa key pair.
Enter file in which to save the key (/home/cent/.ssh/id_rsa):
Created directory '/home/cent/.ssh'.
Enter passphrase (empty for no passphrase): // set any password you like

Enter same passphrase again: // verify


Your identification has been saved in /home/cent/.ssh/id_rsa.
Your public key has been saved in /home/cent/.ssh/id_rsa.pub.
The key fingerprint is:
e0:f7:97:60:a4:06:27:81:42:5b:69:e2:54:50:7b:50 info@quantrinet.com

[cent@ns ~]$ cd .ssh

[cent@ns .ssh]$ mv id_rsa.pub authorized_keys

[cent@ns .ssh]$ chmod 600 authorized_keys

[cent@ns .ssh]$ vi id_rsa


// Copy all in this file like below and Paste into a file on Windows client computer.


-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
*******************************
*******************************
-----END RSA PRIVATE KEY-----

[cent@ns .ssh]$ su -

Password:

[root@ns ~]# vi /etc/ssh/sshd_config


PasswordAuthentication no // line 60: change to 'no'



[root@ns ~]# /etc/rc.d/init.d/sshd restart

[2] Download PuTTYgen and start it on Windows client computer. And next, Click [File]-[Load private key] like below. Then, Choose a file which is private key that you made in section [1]



[3] You need to answer with passphrase for private key which you set in section [1].



[4] Click the button 'Save private key' and Save it in any place you like on your computer.



[5] Start putty and move to 'Auth' section like below. next, Select the private key you saved in previous section.




[6] Back to the 'Session' section and input server's IP address to login.