Filamama answers on your home network. It has no tunnel, no proxy and no public certificate built in, and it should never be exposed by forwarding port 5400 on your router.
To reach it from outside the house without opening a port, read the remote access guide on filamama.com.
While you're away
Phones back up when they're home. Photos taken on a trip go to the server when you're back. See How a backup works.