How to set up port forwarding to access my ubuntu 20 LAN remotely via SSH?

Question

Computer networks

I wanted to study on devops to do independent work - to stir up a home server and connect to it remotely, but I did not find a sensible answer to my question. The trouble is this - there is a router from the provider d-link DPN-5402, it comes from a wifi xiaomi 3c access point and then a home computer with a gray ip (then I'll buy a white one). Where to start and in which direction to move? You can configure internal ip, internal, external port and transfer protocol. But where to indicate what and what to do next with it is not clear. I ask for help sensible or at least a detailed article on this issue

Answer 1

Excellent _independent_ work.
I propose to start by reading the literature on networking.
PS read what a white IP is, find out if your provider issues it to you.
Or use crutches with a dedicated external server and VPN.

Answer 2

ports specify ssh'nye it is necessary to do forwarding from long to xiaomi and from xiaomi to a computer with ssh