Aws Generate Key Pair Putty
I want to add new user accounts that can connect to my Amazon Elastic Compute Cloud (Amazon EC2) Linux instance using SSH. How do I do that?
Why does my OpenSSH key fingerprint not match the AWS EC2 console keypair fingerprint? Ask Question Asked 5 years, 10 months ago. If you created your key pair using AWS, you can use the OpenSSL tools to generate a fingerprint from the private key file. Jun 08, 2017 This video will show how to use a PuTTY private key to connect to your Amazon EC2 Linux instance. Prior to this, we were using ssh on the OS X terminal and our.pem key file in order to connect.
May 08, 2019 Before generating a key pair using PuTTYgen, you need to select which type of key you need. The current version of the SSH protocol, SSH-2, supports several different key types. PuTTYgen can generate: An RSA key for use with the SSH-2 protocol. A DSA key for use with the SSH-2 protocol. An ECDSA (elliptic curve DSA) key for use with the SSH-2. 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). Provides an EC2 key pair resource. A key pair is used to control login access to EC2 instances. Currently this resource requires an existing user-supplied key pair. This key pair's public key will be registered with AWS to allow logging-in to EC2 instances. When importing an existing key pair the public key material may be in any format. 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. To use the default private key that Lightsail generates, choose Download next to the default private key for the AWS Region where your instance is located. To create a new key pair in Lightsail, choose Create New. Choose the AWS Region where your instance is located, and choose Create. Enter a name, and choose Generate key pair.
Short Description
Every Amazon EC2 Linux instance launches with a default system user account with administrative access to the instance. If multiple users require access to the instance, it's a security best practice to use separate accounts for each user.
You can expedite these steps by using cloud-init and user data. For more information, see How can I give a user permissions to connect to my EC2 Linux instance using SSH?
Resolution
Create a key pair for the new user account
- Create a key pair, or use an existing one, for the new user.
- If you create your own key pair using the command line, follow the recommendations at create-key-pair or New-EC2KeyPair Cmdlet for key type and bit length.
- If you create your own key pair using a third-party tool, be sure that your key matches the guidelines at Importing Your Own Public Key to Amazon EC2.
Add a new user to the EC2 Linux instance
1. Connect to your Linux instance using SSH.
2. Use the adduser command to add a new user account to an EC2 instance (replace new_user with the new account name). The following example creates an associated group, home directory, and an entry in the /etc/passwd file of the instance:
Note: If you add the new_user to an Ubuntu instance, include the --disabled-password option to avoid adding a password to the new account:
3. Change the security context to the new_user account so that folders and files you create have the correct permissions:
Note: When you run the sudo su - new_user command, the name at the top of the command shell prompt changes to reflect the new user account context of your shell session.
4. Create a .ssh directory in the new_user home directory:
5. Use the chmod command to change the .ssh directory's permissions to 700. Changing the permissions restricts access so that only the new_user can read, write, or open the .ssh directory.
6. Use the touch command to create the authorized_keys file in the .ssh directory:
7. Use the chmod command to change the .ssh/authorized_keys file permissions to 600. Changing the file permissions restricts read or write access to the new_user.
Retrieve the public key for your key pair
Retrieve the public key for your key pair using the method that applies to your configuration:
Verify your key pair's fingerprint
After you import your own public key or retrieve the public key for your key pair, follow the steps at Verifying Your Key Pair's Fingerprint.
Update and verify the new user account credentials
After you retrieve the public key, use the command shell session that is running under the context of the new user account to confirm that you have permission to add the public key to the .ssh/authorized_keys file for this account:
1. Run the Linux cat command in append mode:
2. Paste the public key into the .ssh/authorized_keys file and then press Enter.
Note: For most Linux command line interfaces, the Ctrl+Shift+V key combination pastes the contents of the clipboard into the command line window. For the PuTTY command line interface, right-click to paste the contents of the clipboard into the PuTTY command line window.
3. Press and hold Ctrl+d to exit cat and return to the command line session prompt.
(Optional) Allow the new user to use sudo
Note: If you don't want to allow the new user to use sudo, proceed to Verify that the new user can use SSH to connect to the EC2 instance.
1. Use the passwd command to create a password for the new user:
Note: You're prompted to reenter the password. Enter the password a second time to confirm it.
2. Add the new user to the correct group.
For Amazon Linux, Amazon Linux 2, RHEL, and CentOS:
Use the usermod command to add the user to the wheel group.
For Ubuntu:
Use the usermod command to add the user to the sudo group.
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Verify that the new user can use SSH to connect to the EC2 instance
1. Verify that you can connect to your EC2 instance when using ssh as the new_user by running the following command from a command line prompt on your local computer:
To connect to your EC2 Linux instance using SSH from Windows, follow the steps at Connecting to Your Linux Instance from Windows Using PuTTY.
2. After you connect to your instance as the new_user by using SSH, run the id command from the EC2 instance command line to view the user and group information created for the new_user account:
The id command returns information similar to the following:
3. Distribute the private key file to your new user.
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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.
- If needed, download PuTTYgen from the PuTTY download page.(PuTTYgen might have been installed previously with PuTTY or WinSCP.)
- Launch the program, and then click the Generate button.The program generates the keys for you.
- 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.
- Save the public and private keys by clicking the Save public keyand Save private key buttons.
- 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 Putty For Iphone
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
- Under Advanced Options on the Create Server page, click Manage SSHKeys.
- Select public key for the cloud server from the SSH Keys listand click Add Public Key.
- Enter the key name, select the region, and paste the entire publickey into the Public Key field. Then click Add Public Key.
- Go back to the Create Server page, and confirm that your key is listedin the SSH Key list.
Assign a public key
- Under Advanced Options on the Create Server page, select the publickey you want to use from the SSH key drop-down menu.
- 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.
To edit the file (or create it), run the following command on the cloud server:
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.
If you created the authorized_keys file, change its permissionsafter you’re done editing it by running the following command:
Open PuTTY, and go to the SSH > Auth section.
Browse to the location of the key file, and load the private key.
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.
2020-2-7 This is the second example from the documentation of OpenSSL req: Create a private key and then generate a certificate request from it: openssl genrsa -out key.pem 1024 openssl req -new -key key.pem -out req.pem Note that, if you do this directly with req (see 3rd example), if you don't use the -nodes option, your private key will also be. Openssl generate private key from existing certificate. 2015-3-30 This article will show you how to manually generate a Certificate Signing Request (or CSR) in an Apache or Nginx web hosting environment using OpenSSL. Instruct it to generate an RSA private key using the DES3 cipher, and send it as an output to a file in the same directory where you ran the command. Instruct it to generate a. 2020-4-11 The first thing to do would be to generate a 2048-bit RSA key pair locally. This pair will contain both your private and public key. You can use Java key tool or some other tool, but we will be working with OpenSSL. To generate a public and private key with a certificate signing request (CSR), run the following OpenSSL command. 2020-2-5 Generate CSR from existing certificate. Ask Question Asked 4 years, 3 months ago. Can't you just create a new CSR with your existing key? Openssl req -out CSR.csr -key your-existing-key.key -new share. Use RSA private key to generate public key?
After you save your session, your key is loaded automatically when youconnect to your server.
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