That does sound interesting, would you mind sharing what camera hardware you use?
I didn't mention it in my other comment but about 6 months ago I did set up a "YI" brand dome camera[1] for my mother-in-law. It comes with a slick little iPhone/Android app for controlling it, and the setup process / onboarding the device onto her WiFi network was very smooth.
So anyway I was demoing their mobile app to her, and I was going to show her how you'd have to be on her WiFi network with the admin password to be able to access the video stream / device. So I disabled the WiFi on her phone to demo that. My jaw about hit the floor when the video stream was still working over her cellular modem (in other words the video was streaming over the Internet by default)! Note this was fresh out of the box, she didn't sign up for YI's cloud platform option or anything like that.
So yeah I would be very heavy on iptables rules if I were you.
I'm using the official raspberry pi camera module both with a model B and a zero-w. For night vision in my garage, I found a standalone infrared light similar to [1]
I didn't mention it in my other comment but about 6 months ago I did set up a "YI" brand dome camera[1] for my mother-in-law. It comes with a slick little iPhone/Android app for controlling it, and the setup process / onboarding the device onto her WiFi network was very smooth.
So anyway I was demoing their mobile app to her, and I was going to show her how you'd have to be on her WiFi network with the admin password to be able to access the video stream / device. So I disabled the WiFi on her phone to demo that. My jaw about hit the floor when the video stream was still working over her cellular modem (in other words the video was streaming over the Internet by default)! Note this was fresh out of the box, she didn't sign up for YI's cloud platform option or anything like that.
So yeah I would be very heavy on iptables rules if I were you.
[1]: https://www.amazon.com/gp/product/B01CW4BN5M