If you need it exposed to the internet you can at least attempt to change your port forwarding settings on your router to use a different port on the public sid

If you need it exposed to the internet you can at least attempt to change your port forwarding settings on your router to use a different port on the public side of the connection, for example, routing port 10000 to 192.168.1.x:500 or whatever the case is. Not sure why you'd want to print to your home/office printer while you're not there though.