In this tutorial, we will show you how to disable root SSH access on your CentOS 7. By default when you install CentOS 7 and SSH server, the root account automatically has remote access via SSH. This can be dangerous. If the root account password falls into the wrong hands, your server is at the mercy of the bad guys with the password. They can delete every file and folder on the server and take down the entire system with few commands. That’s why limiting the root account from directly accessing the server is recommended.
This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you through the step-by-step disable root SSH access on a CentOS 7 server.
Note: Before you disable SSH logins for the root account, you must create a normal user account. (Otherwise, you will be unable to access your server when you disable the root account for SSH logins.)
Disable Root SSH Access on CentOS 7
Step 1. First, let’s start by ensuring your system is up-to-date.
sudo yum clean all sudo yum -y update
Step 2. Disable Root SSH Access.
To disable that, open the SSH configuration file using the commands below:
nano /etc/ssh/sshd_config
Modify the line as follows:
PermitRootLogin no
Save the file and restart the SSH server by running the commands below:
systemctl restart sshd.service
To re-enable the root account, just put the # symbol for the PermitRootLogin directive in the file and save it. Then restart the SSH server.
Congratulations! You have successfully disabled root SSH access. Thanks for using this tutorial to disable root SSH access on CentOS 7 system. For additional help or useful information, we recommend you check the official SSH website.