Faceit Client connection error

I have firewall with outbound connections are blocked and with set of custom rules. So I add a outbound rule for faceit app located at C:\Users\user\AppData\Local\FACEITApp\FACEIT.exe but gives me a error messege "Network error, trying to reconnect ". When I turn outbound connections allow faceit client connected. So I need to know the what app(s) are need internet access. (I dont wanna Allow outbound connection because it allow all apps to connect internet) Can anyone help me to solve this?