I don't know of any RDP server that runs on *nix but there are a few VNC servers that I have tried. This then requires that you can either install the client on Win at work or run it from a thumb drive.
The best server side vnc over ssh package I have used is nxserver from nomachine. I don't know if they are still around, updated, or compatible with newer distros.
To phone home these days I now just RDP or SSH from my smartphone.