Comment by remram

You can do this with ssh (and socat or mkfifo):

  # receiver
  socat UNIX-RECV:/tmp/foobar - | my-command

  # sender
  my-command | ssh host socat - UNIX-SENDTO:/tmp/foobar

You can relay through any other SSH server if your target is behind a firewall or subject to NAT (for example the public service ssh-j.com). This is end-to-end encrypted (SSH inside SSH):

  # receiver
  ssh [email protected] -N -R ssh:22:localhost:22
  socat UNIX-RECV:/tmp/foobar - | my command

  # sender
  my-command | ssh -J [email protected] ssh socat - UNIX-SENDTO:/tmp/foobar

(originally posted on the thread for "beam": https://news.ycombinator.com/item?id=42593135)