ALOHA load balancer
SSH public key access

Target diagram

Standard SSH access, as bellow:

Context

The client uses SSH to get connected to the Aloha.

Client side configuration

Linux host

To do only if you don’t currently have a SSH key.

1. Generate the key pair with the command ssh-keygen –t rsa:

user:~$ 
ssh-keygen -t rsa

Generating public/private rsa key pair.
Enter file in which to save the key (/home/user/.ssh/id_rsa):
Created directory '/home/user/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/user/.ssh/id_rsa.
Your public key has been saved in /home/user/.ssh/id_rsa.pub.
The key fingerprint is:
9a:1a:37:da:11:0b:9f:0e:fb:e8:b4:93:46:f8:3d:ec user@krusty
The key's randomart image is:
+--[ RSA 2048]----+
|                 |
|                 |
|                 |
|                 |
|    .. . S       |
|   . .o *        |
|    o++X         |
|    .=%+o        |
|    oB+E.        |
+-----------------+

Since our purpose is to get connected to the Aloha without typing anything, we don’t enter a passphrase.

2. Upload your pubic key to the Aloha:

user:~$ scp .ssh/id_rsa.pub admin@192.168.0.100:/tmp/
admin@192.168.0.100's password:
id_rsa.pub 					100% 	393 	0.4KB/s 	00:00

ALOHA configuration

Get connected on the Aloha through SSH:

user:~$ ssh admin@192.168.0.100
admin@192.168.0.100's password:
admin@ALOHA1:~$

Get root access:

admin@ALOHA1:~$ root

Copy the user’s public key into authorized keys dir:

root@ALOHA1:~# cp /tmp/id_rsa.pub /etc/ssh/authorized_keys/admin

To add a key, just concatenate it to the end of the file:

root@ALOHA1:~# cat /tmp/id_rsa.pub >> /etc/ssh/authorized_keys/admin