This article explains how to open a network port on Windows or Mac and why this is sometimes necessary. It also covers what to do with routers.
How to open a port on Windows and MAC firewall
When you install certain software on Windows, the installation wizard can automatically set up the necessary firewall rules for you. But if you install something and find that you are having problems using it, follow these steps:
Press the Windows key, type 'firewall' and select Windows Defender Firewall.
The window that appears will let you select a specific app by selecting Allow app or feature through Windows Defender Firewall. This tool allows you to easily select an installed app and open it on all networks you have set up.
