= Secure SHell (SSL) =

In this lab we are using your host machine as the ssh client and your Ubuntu VM as the ssh server. Download following applications 
 - PuTTY (the Telnet and SSH client itself)
 - PuTTYgen (an RSA and DSA key generation utility

== Password Based Authentication ==
 - Start PuTTY utility, by double-clicking on its .exe file.
 - In the Host Name field, enter the IP address/Hostname of ssh server


 - Click open.
 - It will ask for username followd by password.
 - Username apnic and password training
 - Logout/close this session.

== Public Key Authentication ==

=== Generating OpenSSH-compatible Keys for Use with PuTTY ===
To generate a set of RSA keys with PuTTYgen

 - Start the PuTTYgen utility, by double-clicking on its .exe file.
 - For Type of key to generate, select SSH-2 RSA.
 - In the Number of bits in a generated key field, specify either 2048 or 4096 (increasing the bits makes it harder to crack the key by brute-force methods).
 - Click the Generate button.
 - Move your mouse pointer around in the blank area of the Key section, below the progress bar (to generate some randomness) until the progress bar is full.
 - A private/ public key pair has now been generated.
 - In the Key comment field, enter your email address.
 - The Key passphrase field & re-type the same passphrase in the Confirm passphrase field.9. Click the Save private key button and save as private_key .
 -  Right-click in the text field labeled Public key for pasting into OpenSSH authorized_keys file and choose Select All.
 - Right-click again in the same text field and choose Copy.
 - Open notepad; paste the public key and save it as txt file.

=== Save The Public Key On The Server ===
Now, you need to paste the copied public key in the file ~/.ssh/authorized_keys on your server.

 - Log in to your destination server using putty with username apnic
 - If your SSH folder does not yet exist, create it manually
{{{
mkdir ~/.ssh
chmod 0700 ~/.ssh
touch ~/.ssh/authorized_keys
chmod 0644 ~/.ssh/authorized_keys
}}}
 - Paste the SSH public key into your ~/.ssh/authorized_keys file:
{{{
sudo vi ~/.ssh/authorized_keys
}}}
 - Tap the '''i''' key on your keyboard & right-click your mouse to paste.
 - To save, tap the following keys on your keyboard (in this order): '''Esc, :wq''' Enter.

=== Create a PuTTY Profile to Save Your Server’s Settings ===
In PuTTY, you can create (and save) profiles for connections to your various SSH servers, so you don't have to remember, and continually re-type, redundant information.
 - Start PuTTY by double-clicking its executable file.
 - PuTTY's initial window is the Session Category (navigate PuTTY's various categories, along the left- hand side of the window).
 - In the Host Name field, enter the IP address/Hostname of ssh server
 - Enter the port number in the Port field as 22 .5. Along the left-hand side of the window, select Connection > SSH > Auth
 - Browse your file system and select your previously-created private key.
 - Return to the Session Category and enter a name for this profile in the Saved Sessions field.
 - Click the Save button for the Load, Save or Delete a stored session area.
Now you can go ahead and log in and you will not be prompted for a password. However, if you had set a passphrase on your public key, you will be asked to enter the passphrase at that time (and every time you log in, in the future).