![]() ![]() Wrap Upīeing a Linux administrator, you must be aware of the importance of SSH, which is used to establish a remote connection. That’s how you can configure the SSH on Debian 12. Stop the SSH Server’s service: $ sudo systemctl stop sshĭeny the SSH Over Firewall $ sudo ufw deny ssh You can avoid such cases by disabling the SSH and disallowing the SSH over the firewall. However, this may happen on extremely exposed servers. What if you are now done with the SSH but still think some penetration can occur? Well, Linux is well-known for its security. The connection will be terminated instantly, as seen in our case: $ exit To break the connection, type exit and hit enter. Once the connection is established, you can see that the username and the hostname have been changed to the machine you are connected to. You have to write “yes” to continue connecting and then insert the password of the server’s username that you entered in the command. For example, we have created an SSH connection with a Linux server. Syntax: $ ssh the username and the IP address of the server to whom you are establishing the connection. The command’s syntax to connect to the machine via SSH is: Once you have done the above-listed steps, you can make a new SSH connection. To verify it, check the status of the ufw utility in verbose mode as follows: $ sudo ufw status verbose What if the SSH is listening to a port other than 22? Then, you have to specify the port number in the command: $ sudo ufw allow Now, use the allow option of the ufw utility to allow SSH on the firewall as follows: $ sudo ufw allow ssh To install the ufw on Debian 12, use the command: $ sudo apt install ufw ![]() Here, the ufw utility will allow SSH over the firewall. The SSH server listens to port 22, which depends on the approval of your system’s firewall. The output of the command shows that the SSH is also running in an active state and is enabled. To verify these, you need to check the status of the SSH service using the command: $ sudo systemctl status ssh Meanwhile, it is recommended to enable the SSH service as well to keep functioning the SSH after every restart: $ sudo systemctl enable ssh You can start the SSH service as follows: $ sudo systemctl start ssh Right after the installation, the SSH service will be started automatically. So, here the SSH keyword in commands will refer to the service that manages the SSH server on Debian 12. Note: The SSH server is associated with the service named “ ssh” on Debian 12. By enabling SSH, administrators gain the ability to manage their systems from any location remotely, eliminating the need for physical access. How to Configure and Enable SSH on Debian 12?Įnabling and configuring SSH on Debian 12 is of utmost importance as it allows for secure remote access and administration of Debian servers. The command to install SSH on Debian 12 is as follows: $ sudo apt install openssh-server ![]() Thus, before proceeding, you must ensure that the SSH is installed on your system. The purpose of the guide is to enable and configure SSH on Debian 12. ![]() We have prepared this guide to teach you how SSH can be enabled and configured on Debian 12. You might be wondering how to configure or enable SSH on Debian 12. SSH plays a vital role in enabling secure remote access, file transfers, and encrypted communication for Debian users, enhancing their systems’ overall security and flexibility.ĭebian 12, the latest LTS of the Debian distribution, has been released, which offers more advanced security features and an improved user experience. It allows users to log into and manage remote machines or servers securely. SSH (Secure Shell) is a cryptographic network protocol that provides secure remote access and control over a network. ![]()
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