I have Shell Access (as Admin) to a "Cloud" System (Ubuntu 16.04 Server, but due to be Reinstalled as Debian 9.4. Go Debian!)
When I ssh in, to my "Regular Account", I type "who", and get the External IP Address for my Spectrum Broadband access.
What I got, just a few minutes ago, was the following response:
>> chronos@localhost:~$ who
>> chronos pts/0 2018-05-26 00:47 (173.95.180.12)
>> chronos@localhost:~$
(This is a Dynamic IP, from Spectrum, formerly Time Warner Cable, formerly Roadrunner. You know the drill: Small fish, eaten by a medium-sized fish, who is, then gobbled up by a Big Fish).
I haven't reviewed the Source Code for the "who" command, to see how it gets that IP Address. Anybody?
Thank you and best regards,
Kenneth Parker, Troubleshooter