If you install CSF (ConfigServer Security & Firewall) you will find in their recommend list that you need to change your SSH port for security reasons. And changing SSH port in both Ubuntu or CentOS is not hard.To change SSH port in Linux (Ubuntu or CentOS): 1. Open your terminal with root access 2. Edit ssh_config file:3. Change the port4. Save and close. Then restart your SSH Server:It's easy right? Now when you connect to SSH from putty probably, you need to use port … Read more...