It runs over port 22, SSH. On *nix, simply run the SSH daemon. On Windows, there are 3rd party SSH daemons available out there. Google it.
Our scars have the power to remind us that our past was real. -- Hannibal Lecter.
Talent is God given. Be humble. Fame is man-given. Be grateful. Conceit is self-given. Be careful. -- John Wooden