Startup/shutdown question

Hi,
I installed serviio successfully on my RaspberryPi model 2B.
Data location is on a nfs mounted share on a NAS. Everything works well, even media access over the internet as well as administration using ServiiDroid on my Android based smartphone.

Unfortunately the NAS does not go into sleep mode any more, since > 2 weeks meanwhile. Serviio is set up to refresh the data every 24 hours. I would expect this refresh to take a few minutes, as long as nothing has changed meanwhile. But as I said: NAS is accessed permanently, so that it can't go to sleep mode any more.

To fix this issue I'm thinking about shutdown serviio remotely as long as I don't need it and start it up in same way as soon as I'd like to access my media. It is not so handy to open a Linux console on an Android smartphone and remotely log in to the RaspberryPi from anywhere, so I'm looking for an alternative solution. Ideally I would simply have an icon on the smartphone which would (maybe password protected) startup or shutdown Serviio on the RaspberryPi. Does anyone know how to realize this, or is an alternative solution for the described issue possible?

[atc98092]

I could see having a script on a local network computer to stop/start Serviio on a different machine, but accessing from outside the firewall seems to be too much of a security hole for someone to attempt to exploit. It is possible to open a port on the firewall to reach the Serviio console and stop the server (but the base Serviio process remains running, which might not allow the NAS to sleep) but because the console has no security at all (not even a basic password) it's really not a good idea.

Of course, my personal opinion is there's no issue with a NAS running full time. I have all of my PCs set to never sleep, and they use much more power than a NAS. But that's a personal decision for someone to make.