Windows Security can alert you if the firewall is blocking an app, but there are other signs to look for if it doesn't. You can check if the firewall is blocking an app on the Allowed Apps screen ...

Type Windows Security in the search box and hit Enter to open the Windows Security app. Click on Firewall & Network Protection to open the following panel. You will see the Firewall status for the ...

To allow VPN through Firewall in Windows 11 or Windows 10, you need to add the VPN app to the exception list. In other words, you need to allow the VPN app through firewall on your computer.