Re: Limiting internet access by time

[Lisi Reisz <lisi.reisz@gmail.com>]

On Friday 05 August 2016 11:40:28 Brian wrote:
> On Fri 05 Aug 2016 at 00:02:40 +0000, Mark Fletcher wrote:
> > On a stretch box I have, I want to allow access to the Internet between
> > the hours of 9am and 9pm and block it between 9pm and 9am. Ideally allow
> > local network access throughout but block Internet access between 9pm and
> > 9am, but I can accept total network blockage in the off times if
> > necessary.
>
> Your ideal is achievable.
>
>   ip route del default via <gateway_IP>
>
> Plus a cron job.
>
> > The machine is used as a desktop, so it is not up all the time. It might
> > be brought up before 9am, in which case it should come up blocked and
> > unblock at 9am, or it may be brought up after 9am, in which case it
> > should come up unblocked and block if it is still up at 9pm. Time
> > precision isn't important.
>
> If it came up unblocked before 9am cron could see to it that blocking
> happens.
>
> > An ideal solution would allow dhcp updates, ntp etc to continue but block
> > any normal user access eg web browsing etc.
>
> How essential is this? cron could
>
>   ip route add default via <gateway_IP>
>
> at specific times between 9pm and 9am and then remove the default route.
> If the machine isn't up all the time it seems unnecessary to me.

Perhaps he wants to stop his children/grandchildren/house guests surfing the 
web at 3:00 am.  

Lisi