How to forward SSH?

Question

SSH

Hello.
In the picture, my scheme for accessing the Internet

How to forward the SSH port for access from the Internet?

Answer 1

1. Is it possible to connect via ssh to PC Win8.1 with Lubuntu? If not, we turn the firewall settings on Win8.1 and allow packets to go to the Router, if so, look further
2. Does Yota allow incoming connections from the Internet? No - we turn the settings, Yes - we look further
3. On Lubuntu we put a farwall (iptables ? ...) and forward packets from the external interface to the internal interface, to IP Win8.1 and port 22 tcp
That's it.
In general, sequentially, starting from the tail, we open everything

Answer 2

It was already similar - How to set up ssh to a computer in a foreign local network?