hello i want to open single port in spesific lan ip. Also i have static external ip. So i want to open port 20123 in 192.168.3.185 and from outside world i want to type externalstaticip:20123 to join. How can i do that? I know that to do this must go to virtual server. But i dont know how. I attached some screenshot to help understanding.
If you can tell me exatly what must to write in Rule.