Any protected firewall available is there any protected firewall available? I have tried many &amp; 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..
Try making them device administrators. I know that AFwall+ can be set as device admistrator. I have not used Netguard except for testing purposes in the last year but I believe it is also possible to set it as device admistrator.