This is not on a full router so I can’t do any blocking router based blocking so it would have to be OSMC itself.
I want to have my system setup so when I’m at work in the lunch room during break I can hookup my Pi to the TV and then control it and stream files to with Yatse on my phone with the Pi tethered to my phone. Which works great as it is using a old phone with no current service. But I want to not carry around the extra phone and just use my main one. I would also like to ensure that none of my phone data is used without just turning it off for everything.
How can I do this because at home in testing using iftop I have noticed contant connections to WAN addresses that would use my mobile data.
I’m asking here instead of a general Linux forum because I notice the networking setup is different then most because iptables is not installed so I want something clean for the OSMC distro.