Kali Linux port forwarding tutorial:
Maybe it would be helpful for someone.
A port forward is a way of making a computer on your home or business network accessible to computers on the internet, even though they are behind a router. It is commonly used in gaming,
security camera setup, voice over IP, and downloading files. After you have forwarded a port you are said to have an open port.
http://link.coffee/portforwardingkalilinux