MikroTik Back-To-Home 没有公网IP都可以access到！！！

https://help.mikrotik.com/docs/display/ROS/Back+To+Home
https://help.mikrotik.com/docs/display/ROS/Back+To+Home

Overview

Sub-menu: /ip cloud
Packages required: routeros
RouterOS version required: v7.12 and newer
Hardware requirements: ARM/ARM64/TILE architecture devices

Back To Home is a convenience feature, that configures your device for secure VPN access from anywhere in the world to your router and your network, even if your router does not have a public IP address, is behind NAT or Firewall.

Configuration is done with MikroTik Back to Home app (Android, iPhone).

If the VPN server (your home router) has a public IP address, the VPN app will create a direct VPN connection between the phone and the router. However, if the router is not directly reachable from the internet, the connection will be made through the MikroTik relay servers. The connection is always end-to-end encrypted, the relay server or any other device does not have access to the encryption keys, in essence, the relay only helps your device to reach the router. The connection will appear as going out from your router, not from the relay. In case of going through relay, speed could be limited.

This feature is a convenient option to access your home network or view content available in your home country, from locations, where some content is not available. It is not meant for anonymity, it is for simple one click access to your home network. For more granular security controls, we recommend to manually configure and secure a VPN connection using the advanced RouterOS options.