- Rsa-2048 Decrypter
- Rsa 2048 Encryption
- Ubuntu Generate Rsa Private Key
- Crypto Key Generate Rsa 2048
- Ubuntu Generate Rsa 2048 Keys
SSH stands for “Secure Shell” and is an encrypted protocol used to log in and manage a remote server. SSH also supports various authentication mechanisms. SSH uses password-based authentication and public key-based authentication for a secure connection between a client and a server. SSH key-based authentication is more secure than password-based authentication because keys are very hard to guess or crack using currently available computing power.
In this tutorial, we will show you how to set up SSH key-based authentication on an Ubuntu 18.04 server.
Prerequisites
- Two fresh Ubuntu 18.04 VPS on the Atlantic.Net Cloud Platform.
- Root passwords configured on both servers.
Step 1 – Create an Atlantic.Net Cloud Server
First, log in to your Atlantic.Net Cloud Server. Create a new server, choosing Ubuntu 18.04 as the operating system with at least 2GB RAM. Connect to your Cloud Server via SSH and log in using the credentials highlighted at the top of the page.
May 05, 2019 1st create the keys and RSA will create public and private keys. If you no need add passphrase on your key then you can add passphrase with key but I skipped the passphrase on server. Dec 07, 2019 What is SSH Key? How To Generate SSH Key in Linux? By Sohail December 7, 2019 December 7, 2019 0. Let us follow the following steps to generate RSA keys –. How To Set Up Canonical Livepatch On Ubuntu 20.04 “Focal Fossa”.
Rsa-2048 Decrypter
Once you are logged into your Ubuntu 18.04 server, run the following command to update your base system with the latest available packages.
Step 2 – Generate the SSH Key on the Client Machine
First, log in to your client machine and generate a new SSH key pair by running the following command:
You will need to press Enter to accept the default file location and provide a passphrase to add an extra layer of security, as shown below:
The above command will generate a 2048-bit RSA key pair with a secure passphrase to prevent unauthorized users from logging in.
You can see the generated public and private keys with the following command:
You should see the following output:
At this point, you have public and private keys that you can use to authenticate with your Ubuntu server.
Step 3 – Copy the Public Key to the Ubuntu Server
Next, you will need to copy the public key from the client machine to your Ubuntu 18.04 server. You can copy the public key with ssh-copy-id utility as shown below:
You should see the following output:
Type “yes” and press ENTER to continue. You should see the following output:
Rsa 2048 Encryption
Next, you will be prompted to enter the remote username and password. After the successful authentication, the content of the public key ~/.ssh/id_rsa.pub will be appended to the remote user ~/.ssh/authorized_keys file as shown below:
Step 4 – Disable SSH Password Authentication
Ubuntu Generate Rsa Private Key
Next, log in to your Ubuntu 18.04 server machine and disable SSH password-based authentication to add an extra layer of security to your server.
You can disable password-based authentication by editing the file /etc/ssh/sshd_config:
Find the following lines and change the value to “no”:
Save and close the file, then restart SSH service to apply the configuration:
Step 5 – Log in to the Server using SSH Keys
At this point, SSH key-based authentication is configured. Now it’s time to log in to the Ubuntu 18.04 server machine with the public key.
You can login to your Ubuntu 18.04 server by simply running the following command:
If you are logging in for the first time, you will be prompted as shown below:
Type Yes and hit Enter key to continue. Next, you will be prompted to enter the passphrase for your private key as shown below:
Provide your private key passphrase and hit Enter to log in to your server.
Crypto Key Generate Rsa 2048
Conclusion
Ubuntu Generate Rsa 2048 Keys
In the above tutorial, we learned how to set up an SSH key-based authentication with a passphrase on Ubuntu 18.04. The connection between your client machine and Ubuntu 18.04 server machine is now highly secure. You can also use the same key for another remote server. If you’re ready to get started with SSH key-based authentication, try VPS hosting with Atlantic.Net today.