How to ping a computer connected via a 4g modem?

Question

Windows

If both external and local Ip are known, how to ping a computer connected via a 4g modem to the Internet.

Answer 1

Ping ip-modem
You can't ping the computer. In theory, you can forward some port through dst-nat and check availability, but doubts gnaw at me that a 4g modem can do this.

Answer 2

For example, a megaphone behind nat gave me non-gray addressing when connected via a modem.
That is, on the interface, I saw something like 100.20.xx and white, something like 83.15.xx
That would be a laugh if, for example, the address of my site would match the address on the interface.
In general, they do not do a megaphone well ...
According to your problem, I will say that with a modem connection, you will always get a gray ipv4 address and it is not possible to ping it from outside.
There is an option, connect from this PC to your VPN and be, for example, on the same network as the PC from which you want to ping. In this case, you can also cling via SSH, and so on ...