Aws Generate Key Pair Putty

07.04.2020by
PART 1: SSH INTO AN EC2 INSTANCE FROM WINDOWS USING PUTTY
Video Walkthrough:
Key

https://www.youtube.com/watch?v=bi7ow5NGC-U

DOWNLOAD & Install PuTTY

Go to Windows Start menu → All Programs → PuTTY → PuTTYgen. Creating a new key pair for authentication. To create a new key pair, select the type of key to generate from the bottom of the screen (using SSH-2 RSA with 2048 bit key size is good for most people; another good well-known alternative is. PuTTYgen is used to generate public or private key pair for creating SSH keys. Below is the complete guidance about how to generate RSA key in the Windows operating system: Once you install the PuTTY on your machine, you can easily run PuTTYgen. For the same, go to Windows - Start Menu - All Programs - PuTTY - PuTTYgen. Putty is a free SSH client for Windows. This guide will show you how to use Putty to generate your SSH keys and connect to your AWS server. Begin by downloading and installing Putty and it's related SSH key generation tool. Download both the Putty client (putty.exe) and the putty key generator (puttygen.exe).

If you don’t have the PuTTY software installed on your system, you will need to download it from www.putty.org. Be sure to select the entire package as shown below, as it will include all the needed utilities such as puttygen and pageant.

DOWNLOAD YOUR EC2 KEY PAIR FILE

If you have not already downloaded (or cannot locate) your key pair (i.e my_key_pair.pem) you will need to create a new EC2 instance and download a new one. A key pair consists of a public key that AWS stores and a private key file that you store (downloaded as PEM file). PEM stands for Privacy Enhanced Mail and is a widely used X.509 encoding format used for security certificates. Together, the two keys enable you to securely connect to your EC2 instance using SSH.

CONVERT YOUR PEM FILE TO PPK FORMAT

PuTTY does not natively support the PEM format that AWS uses, so you need to first convert your PEM file to a PPK file (PPK = PuTTY Private Key). To do this, you use the PuTTYgen utility. To start the utility you can type puttygen in the Windows start dialog box:

On the PuTTYgen dialog box, click the Load Button and then select the .pem file that you downloaded from AWS. Note: when browsing for your pem file be sure to select All Files in the dropdown list that is located to the right of the File name field. PuTTYgen will then load and convert your file.


As the message indicates, you then need to click on “Save private key”. You will receive a warning message asking if you want to save this key without a passphrase. Be sure to select Yes.

Provide a name for your ppk file and click save.


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LAUNCH PuTTY

Now that you have converted the pem file to a ppk file, you are ready to use the PuTTY utility. In the Windows start dialog box, type in putty to start the utility.

ENTER HOST NAME

Enter your Host Name into the appropriate field. This will be in the format of: user_name@public_dns_name. Be sure to specify the appropriate user name for your AMI type. For example:

Microsoft office 2013 key generator free. •For an Amazon Linux AMI, the user name is ec2-user.

•For a RHEL AMI, the user name is ec2-user or root.

•For an Ubuntu AMI, the user name is ubuntu or root.

•For a Centos AMI, the user name is centos.

•For a Fedora AMI, the user name is ec2-user.

•For SUSE, the user name is ec2-user or root.

•Otherwise, if ec2-user and root don’t work, check with the AMI provider.

Here is an example for connecting to an Amazon Linux AMI:

SELECT YOUR PPK FILE

Next, click on the + button next to the SSH field to expand this section. Then click on Auth (which stands for authenticate) and enter the name of your private key file (i.e. the ppk file) where it says Private key file for authentication (if you click on browse you can easily search for the directory where you have stored it).

OPEN YOUR TERMINAL SESSION

Lastly, click on Open to start your SSH session.

Note: if this is the first time that you are logging into the instance, you will receive the following alert.

Click on Yes to continue.

If you did everything correctly, you will see a new window appear displaying your command line SSH session (troubleshooting hint: if the window appears but fails to connect, a common issue is that you likely have not created a rule to enable SSH inbound traffic on Port 22 in the Security Group that is attached to this instance….so double check that first).


Part 2: Connecting to a Linux Instance that is Running in a Private Subnet

USE PuTTYGEN TO CREATE A PRIVATE PPK FILE

You will first need to use PuTTYGen to convert your PEM file into a private PPK file that has a password. So, in PuTTYGen, choose Conversions > Import Key and select your PEM-formatted private key. Enter a passphrase and then click Save private key, as shown in the following screenshot. Save the key as a .ppk file

OPEN THE PAGEANT UTILITY THAT IS PART OF THE PuTTY PACKAGE

Pageant is an SSH authentication agent and allows you to hold your private key in memory, so that it can in turn be forwarded by PuTTY. To start the utility you can type pageant in the Windows start dialog box:

Putty Create Key Pair


ADD YOUR PPK KEY FILE INTO PAGEANT

Find the Pageant icon in your Windows task bar (generally found at the bottom of your screen…look for computer terminal with a black hat on top of it). Double click on this icon then select Add Key and in the pop up dialog window navigate to the folder that contains your PPK file and select it, followed by clicking on Open. When you select the PPK file, you’re prompted to enter the passphrase you chose when you converted the key. You can then close the Pageant Key List window after your key has been added:

OPEN UP THE MAIN PuTTY UTILITY

On the main screen (Session) enter the Host Name information for your instance as was described earlier in this guide (i.e. user_name@public_dns_name). Then click on SSH and select the Auth tab. Click on Allow agent forwarding and leave the Private key file for authentication empty as shown here:

Then click on Open and it should connect you to your publically accessible EC2 instance (in this scenario, this instance would be referred to as the Bastion host or a jump box).

Aws Generate Key Pair Putty Kit

CONNECTING TO THE PRIVATE INSTANCE
Once you are logged into the Bastion host you can then “jump” to the private instance by using the private IP address of the instance. This is done by issuing an SSH command in your terminal session:
ssh user_name@private_IP_address (i.e., something like this: ssh ec2-user@10.0.3.25).
You should then see a second log-in occur within your PuTTY session. If you did everything correctly you will now be logged into the private instance via SSH.
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Aws Create Ssh Key Pair

Generate RSA keys with SSH by using PuTTYgen

One effective way of securing SSH access to your cloud server is to usea public-private key pair. This means that a public key is placed onthe server and a private key is placed on your local workstation.Using a key pair makes it impossible for someone to log in by using justa password, as long as you set up SSH to deny password-basedauthentication.

This article provides steps for generating RSA keys by using PuTTYgen onWindows for secure SSH authentication with OpenSSH.

Generate keys

In Windows, use PuTTYgen to generate your public and private keys.

  1. If needed, download PuTTYgen from the PuTTY download page.(PuTTYgen might have been installed previously with PuTTY or WinSCP.)
  2. Launch the program, and then click the Generate button.The program generates the keys for you.
  3. Enter a unique key passphrase in the Key passphrase andConfirm passphrase fields.For additional information about using passphrases,see Log in with a SSH Private Key on Windows.
  4. Save the public and private keys by clicking the Save public keyand Save private key buttons.
  5. From the Public key for pasting into OpenSSH authorized_keys filefield at the top of the window, copy all the text (starting with ssh-rsa)to your clipboard by pressing Ctrl-C.You need this key available on your clipboard to paste eitherinto the public key tool in the Control Panel or directly into theauthorized keys on your cloud server.

Use the key pair

You can use the RSA key pair in the following ways.

Specify your SSH key when creating a new cloud server

Aws Generate Key Pair Puttygen

When you create a cloud server, you can assign a public key from the list of keys.If your key is not already in the list, you may add it, and then assign it.

Add a new public key to the list

  1. Under Advanced Options on the Create Server page, click Manage SSHKeys.
  2. Select public key for the cloud server from the SSH Keys listand click Add Public Key.
  3. Enter the key name, select the region, and paste the entire publickey into the Public Key field. Then click Add Public Key.
  4. Go back to the Create Server page, and confirm that your key is listedin the SSH Key list.

Assign a public key

  1. Under Advanced Options on the Create Server page, select the publickey you want to use from the SSH key drop-down menu.
  2. When you are done specifying the all the other details for the server,click Create Server.

Assign your SSH Key to an existing cloud server

To make use of your newly generated RSA key pair, you must tell PuTTY touse it when connecting to your cloud server.

  1. To edit the file (or create it), run the following command on the cloud server:

  2. Paste the text onto its own line in the file.

    You must have the key available in your clipboard to paste it. The key and itsassociated text (the ssh-rsa identified at the start and the comment at the end)must be on one line in the file. If the text is word-wrapped onto multiple linesan error might occur when connecting.

  3. If you created the authorized_keys file, change its permissionsafter you’re done editing it by running the following command:

  4. Open PuTTY, and go to the SSH > Auth section.

  5. Browse to the location of the key file, and load the private key.

  6. Go to the Session page, and save the session. This saves the configurationso that PuTTY uses the key every time that you connect to your cloudserver.

After you save your session, your key is loaded automatically when youconnect to your server.

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Aws Generate Key Pair Putty Key

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