Log into your dedicated or cloud server as administrator.
Start
Click on: Administrative Tools
Under: Administrative Tools
Double click on: Windows Firewall with Advanced Security
Under: Windows Firewall with Advanced Security
Under: Windows Firewall with Advanced Security on Local Computer (Left Pane)
Right click on: Inbound Rules
Click on: New Rule
Under: New Inbound Rule Wizard
Click on: Port (Rule that controls connections for a TCP or UDP port)
Click on: Next
Click on: TCP
Click on: Specific Local Ports: (Ex:21) Open port for FTP
Click on: Next
Click on: Allow the connection
Click on: Next (Default)
Under: Name (Ex: FTPPort-21)
Click on: Finish