Hi drmax
There is solution on this matter, of all the place is in Xbox website.
Xbox One
Do read and select the option that suit you.
Basically, you need to do
Family setting (do include yourself &or spouse &or whoever when you are not around as
Administrator ) and
Timing allow for the child to use and play, as a reward.
Family setting
How do you get rid of parental control on Xbox one?
How a parent can change the privacy and online safety settings for a child account. ...
Add a new member to your family on Xbox One. ...
Grant an exception to your child's content limits on Xbox One. ...
Remove an account from an Xbox One console. ...
Promote a child account to an adult account on Xbox One.
How do I set time limits on Xbox one?
To set the Family Timer
On your console, go to Settings, and then select Family.
Select On to turn on Console Safety.
Enter a 4-button pass code using your controller.
Select Family Timer.
Select whether you want to set a Daily or Weekly timer.
Router wifi is rather weak.
I did asked DLink technician on about wireless security.
He mentioned on hiding the wifi SSID, in setting in the router, by not display.
But there is an warning to take note.
That is if you forget the SSID, you may unable to log in.
Of course, there is a need to have an administrator login with the password secure.
Hence, i conclude that router setting is rather weak.
Even Parent Control is limited.
Eric.