Is it? If you have the IP of the sender/receiver, it's trivial to use even something like netcat to send/receive files. Samba works as well if you want somethin

Is it? If you have the IP of the sender/receiver, it's trivial to use even something like netcat to send/receive files. Samba works as well if you want something more user-friendly and integrated with the traditional file explorers on various OSes.