In AWS, when you launch any EC2 Linux instance, you should select a key pair for that particular instance. AWS key pair will be in the standard private key format with.pem file extension. But if you are using PuTTY on your Windows laptop to login to AWS instance, you have a problem. PuTTY doesn’t support PEM format. This guide describes how to generate and use a private/public key pair to log in to a remote system with SSH using PuTTY.PuTTY is an SSH client that is available for Windows and Linux (although it is more common on Windows systems). To create a key pair using a third-party tool. Generate a key pair with a third-party tool of your choice. Save the public key to a local file. For example, /.ssh/my-key-pair.pub (Linux) or C: keys my-key-pair.pub (Windows). The file name extension for this file is not important. Generating a Secure Shell (SSH) Public/Private Key Pair Several tools exist to generate SSH public/private key pairs. The following sections show how to generate an SSH key pair on UNIX, UNIX-like and Windows platforms.

Using a Public/Private key to authenticate when logging into SSH can provide added convenience or added security. The Public/Private key can be used in place of a password so that no username/password is required to connect to the server via SSH. Instead the unique public and private key provide the secure authentication. The keys may also be generated with a different password from your cpanel password if desired.

1. In the Bluehost cPanel click on the SSH/Shell Access icon under the Security category.
2. Open the Manage SSH Keys tool.
3. Click Generate a New Key and complete the fields shown. We recommend the RSA key type and a 4096 bit key size for maximum security.
   Note: There is bug in cPanel at this time that does not allow you to create a 2048 or 4096 bit DSA key
4. The location of the newly generated public and private key will be shown as well as the key fingerprint.
5. Click Go Back.
6. Next to the Public Key you generated, click Manage Authorization then click Authorize to activate this public key.
7. Click Go Back.
8. To the right of the Private Key, click on View/Download. Then click the Download Key button. Save the file to your computer and click go back.

You may now use the private key saved on your computer to SSH securely to our server. If you are using PuTTY, please see the configuration steps below.

Generate A Key Pair Putty For Windows

1. Download and open PuTTYgen from the PuTTY Download Page
2. Click Load


3. Locate the private SSH key that you have downloaded.
Note: You will need choose to display All Files* from the menu to the right of the File Name field.
4. Enter the password for your SSH Key



5. Click the Save private key button to create the ppk file.

Generate A Key Pair Putty Key

1. In PuTTY, under Session, enter your Host Name


2. Under Connection choose Data
3. Enter your cPanel username as the Auto-login username



4. Under SSH, choose 2 from Preferred SSH Protocol Version
5. Under SSH -> Auth, you will need to specify where your private key can be found. Remember this is where you saved the private key on your local computer. Click Browse to locate the file on your computer.


6. Under Sessions, type a name (such as 'my site') in the Saved Sessions box and click Save.

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