The default SSH port is 22. If you wish to change the SSH port for your Linux server to for example 30200 you can do this the following way:

Connect to your server with the default SSH port with the SSH client of your preference.

Edit the configuration file with for example nano or vi

root@worldstream:~$ sudo vi /etc/ssh/sshd_config

search for “Port”

# What ports, IPs and protocols we listen for
Port 22

In this case we want to change the port to port 30200

Change the number to 30200,

# What ports, IPs and protocols we listen for
Port 30200

Exit the text editor and restart the service.

Restart the SSH service on Debian based systems:

root@worldstream:~$ sudo service ssh restart

Restart the SSH service on Red-hat based systems:

root@worldstream:~$ sudo service sshd restart

You are now able to connect to your server with port 30200