How to Change the SSH Port on CentOS 8

We can change the default SSH port CentOS 8 as an added security concerns. To Change the SSH Port on CentOS 8 systems connect to server with root privileges.

 

This article describes How to Change the SSH Port on CentOS 8 System.

 

Step 1: SSH Configuration: open and edit the below ssh configuration file. Find the below parameter Port 22 and change from Port 22 to Port xxxx (Port 2234) as desire:

 

[root@linuxcnf ~]# vi /etc/ssh/sshd_config ……………………. Port 2234 ……………………. [root@linuxcnf ~]#

 

Step 2. SELinux Rule: Run the following command to add a rule in SELinux:

 

[root@linuxcnf ~]# semanage port -a -t ssh_port_t -p tcp 2234 [root@linuxcnf ~]#

 

Step 3: Restart SSH Service: Restart the sshd service by running the following command:

 

[root@linuxcnf ~]# systemctl restart sshd [root@linuxcnf ~]#

 

Step 4. Validate the Port Number: Run the following command to validate//verify if the port number is changed or not:

 

[root@linuxcnf ~]# netstat -tulnp|grep ssh tcp        0      0 0.0.0.0:2234            0.0.0.0:*               LISTEN      2680/sshd tcp6       0      0 :::2234                 :::*                    LISTEN      2680/sshd [root@linuxcnf ~]#

 

Done!!! Now the SSH service would accessible on port 2234 only.