Hi all, I would like some help if possible.

I am running a dreambox sharing with 2 friends of mine. We all have dreambox. And cccam 2.1.4.
Has been working great for a long time now, the other day I went in to check the status of my cccam and I noticed other people on it, all watching tv from my dreambox.
Someone somewhere has managed to hack into my dreambox and alter the config file.
Scenes then I have reflash my box and my 2 friends.
How can I stop others getting in again?

Your help would be gratefully.