17.04.2020

Generate And Use An Ssh Key Putty With Centos7

Generate And Use An Ssh Key Putty With Centos7 7,8/10 8034 votes

Home Key-Based SSH Logins With PuTTY - Page 2 Scan your Web-Server for Malware with ISPProtect now. Get Free Trial. Key-Based SSH Logins With PuTTY - Page 2. Make sure you select SSH-2 RSA under Type of key to generate and specify 1024 as the Number of bits in a generated key. Generate RSA keys with SSH by using PuTTYgen. Last updated on: 2016-06-23; Authored by: Rackspace Support; One effective way of securing SSH access to your cloud server is to use a public-private key pair. This means that a public key is placed on the server and a private key is placed on your local workstation. If you want to use this key generated directly, I would suggest you use something like MINGW32/MINGW64, Cygwin, etc. Which allow you to use the ssh command in Command Prompt or some other terminal-like window. How to Generate SSH Keys on PuTTY. SSH keys are one of the most secure SSH authentication options. It is definitely more secure than the usual SSH password authentication. Therefore, it is highly recommended to use SSH Key authentication. How To Configure SSH Keys Authentication With PuTTY And Linux Server In 5 Quick Steps. This tutorial explains how you can replace password-based SSH authentication with key-based authentication which is more secure because only the people that own the key can log in. Jan 01, 2019 One Microsoft Windows based client and a CentOS 7 based server. Generate SSH Keys using PuTTYgen: PuTTYgen is included with PuTTY SSH client. Both are free and open source and distributed under MIT License. Therefore, it is available for free download at PuTTY official website. We have already installed PuTTY SSH client on our MS Windows client.

Generate And Use An Ssh Key Putty With Centos 7 1
Generate And Use An Ssh Key Putty With Centos 7 Download

Apr 12, 2018 SSH-key-based authentication provides a more secure alternative to password-based authentication. In this tutorial we'll learn how to set up SSH-key-based authentication on a CentOS 7 installation.

Introduction

In this post I will show you how to login to your Linux Server with SSH key from Windows using PuTTY. PuTTY is an open source software and SSH and telnet client developed for the Windows platform.

I will connect to CentOS 7 (Linux) VPS server with SSH key from Windows operating system using PuTTY client.

Prerequisites

In order to connect to remote server with SSH key pair using PuTTY you need to generate private/public SSH key pair. You can find the tutorial Manually SSH key generation in Windows to generate SSH key pair.

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Add Public Key to Linux Server

Read the following steps to setup the public SSH key in Linux server generated using PuTTYgen utility for a particular user, for example, roytuts.

Open Putty by double clicking on PuTTY.EXE.
Enter your server’s IP address and port. The default port is 22 if you have not changed it.

Click on Open button at the bottom right.
Now when you get the blank window input username (roytuts) followed by password.
Now you are in user’s home directory. Create a new directory called .ssh by executing the command $ mkdir .ssh. Note you don’t need to type $ as it is already there.
Restrict the permission of directory .ssh by executing the command $ chmod 700 .ssh.
Now create a file in .ssh directory called authorized_keys with a vi editor. This vi editor is by default available in the Unix based CentOS 7 system. Execute command $ vi .ssh/authorized_keys to create the file.
Now you will see that the file authorized_keys has been opened once created. Now press i to enter INSERT mode. Without INSERT mode you won’t be able to write anything in this file.
Now copy public key which you generated using PuTTYgen utility and paste into it by right clicking on the file editor.
To save and exit from the file editor, type :wq from your keyboard.
Now restrict the permissions of the authorized_keys file with the command $ chmod 600 .ssh/authorized_keys.

You are done setting up with your public in remote Linux server (CentOS 7).

In this section we have seen how to connect to Linux server using password and we also setup the public SSH key in the user’s home directory. The next section will guide you how to connect to Linux server using SSH key pair. This time you don’t need to put user’s password but passphrase which you set during public/private key generation.

Connect to Linux Server using SSH Key

Go through the following steps one by one to connect to Linux server:

Open Putty by double clicking on PuTTY.EXE.
Enter your server’s IP address and port. The default port is 22 if you have not changed it.
Make sure you select SSH radio button.
Now click on Connection -> SSH -> Auth. Browse and select file for loading the private key which you saved during public/private key pair generation using PuTTYgen utility.

Now click on Open button to connect to remote server. You will now see black window where you need to enter your username followed by passphrase (password) you had set during public/private key generation using PuTTYgen utility.

Now you can see the terminal where you can execute commands as per your needs to perform certain operations.

That’s all. Hope you got how to connect to Linux server with SSH key pair using PuTTY from Windows environment.

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