How to change SSH default port on OpenSUSE

In this article, you will learn how to change SSH default port on OpenSUSE. A network protocol called Secure Shell (SSH) enables remote server access for users. Additionally, it secures communication between a client and private server by encrypting it.

Nevertheless, utilising the default Transmission Control Protocol (TCP) port 22 for SSH might be dangerous since it is exposed to a number of online dangers, including brute-force assaults, a hacking technique used to obtain encrypted sensitive data.

Therefore, one of the greatest methods to safeguard your SSH server is to change your default port.

Prerequisites

• vim, vi or any other text editor installed on server to modify config files

• Super user or SUDO user privileges.

Steps to change the default port of SSH

Step 1: Open SSH configuration file using below command in your favorite editor.

vim /etc/ssh/sshd_config

Now, on line number 13, you can see that the line is commented. to set a custom port for ssh service to listen on, follow the below step.

Step 2: Add “Port 2222” in the next line then save and exit the file.

Note:: This process is done when the SeLinux policy was in disabled mode. If you are using Enforce SeLinux policy, you need to follow the Step 7 of this article

Step 3: Restart ssh service using below command

systemctl restart sshd

Step 4: Now, to ensure that you ssh server is listening on your custom defined port, use netstat commad.

netstat -tunlp

Step 5: Enable the port in OS firewall

firewall-cmd --permanent --add-port=2222/tcp
firewall-cmd --reload

Now, you have successfully learnt how to change SSH default port on OpenSUSE.