This content has 4 years. Some of the information in this post may be out of date or no longer work. Please, read this page keeping its age in your mind.Search for applications with “firewall” keyword. On Windows 10 – You will need Windows Defender Firewall with Advanced Security. Click on “Inbound rules”, and on the right pane, select “New Rule..”. If you want a specific port to unlock, select the port option. Select the correct transport protocol and port number on the next step You can name your rule. It is recommended to choose a name, that describes the application which uses this port. Your port now accessible on your local network. If you want to unlock a port to the Internet, you need to set up a port forward in your router’s settings.