My ISP is running NAT and DHCP service so it dynamically assigns IP's to clients and gives one public IP to thousands of users through the internet, so I have to turn on my NAT service in my router so it translates my 192.168.x.x to a public IP given to me by my ISP which is given to many many clients at the same time but their port are different for sure because when I want to open a website ISP server forwards my packet with source and port to destination ip address which is 80 for example and send me back the request from webserver to my isp then forwarding it to me, now what?!!!
How can I determine my public ip address port assigned to me dynamically by ISP dhcp server? and if I find out about that can I do port forwarding on my router for the port number of my public ip that I know temporarily because it changes by dhcp and can I connect to it by remote desktop following a column with port number of my ip?