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
