I am able to establish guest network connection(from Linux) with the host, on the host's network. I can access user files on this network with the right password. Looking from "there" to here on the guest is still difficult.
It was some combination of the commands below. Basically I enabled ssh and discovered what the Linux network IP was in the settings, and forced port 22 open. I'm not saying it was exactly those steps...but it was awesome! I was able to long onto to an Ubuntu session with puTTY and then of course, VS 2017 C++ connection to Linux. Right now I am stumbling around trying to find my executable.