Android. Forwarding usb over the Internet, really?

Question

Android

Good, you need to unlock the bootloader on the sony sl, but there is no direct access to the PC. I decided to try to share usb and connect via otg. I use Lenovo p780 and the usb network gate program, the PC is a virtual machine with win7 x64, as a test it was possible to connect the USB flash drive without problems. I connect sony in fastboot mode, the device is not detected, not by the program, not by Lenovo itself at all. I connect Sony in the usual mode. On lenovo I see an inscription saying MTP device is not connected. And at the same time, until you turn off the cable, do not press anything. The question is what can be done? And does Lenovo give 5v to otg at all? Measure nothing. Conditions are very limited.