Any protected firewall available?

[JKarhani]

Hello,
Is there any protected firewall available? I have tried many & the problem was as follow: - it works very well but ANY user can simply uninstall it!! how didn't they put this into consideration. - i used a program to hide it, and when I hide it it becomes disabled.

I used AFwall+ (root), Netguard..

 

[chanchan05]

Just hide it from launcher. I don't know what you used to hide it that disables it. I hide apps all the time.

Anyway, why is a user uninstalling it a concern? The idea being its your phone and you installed it, and you'll only uninstall it if you don't like it. If you are trying to use it on somebody else's phone to control their internet access, then it's a parental control app you want, not a simple firewall.