Limiting internet access by time

From	Mark Fletcher <mark27q1@gmail.com>
Newsgroups	linux.debian.user
Subject	Limiting internet access by time
Date	2016-08-05 02:10 +0200
Message-ID	<s2AS5-af-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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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.

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.

An ideal solution would allow dhcp updates, ntp etc to continue but block
any normal user access eg web browsing etc.

I've got a solution in mind and would like to see if the community has any
better ideas.

I'm thinking of installing iptables, creating an iptables script that
blocks Internet access (not local addresses) except ntp and dhcp, and
another to open everything up again, and using a systemd service that runs
a script to check the time and run the appropriate iptables script. That
service then gets linked in multi-user.wants to get run at startup. Then
cron jobs can take care of the 9am and 9pm switch overs, calling the same
scripts as appropriate.

Is there a better way to do this?

Mark

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Thread

Limiting internet access by time Mark Fletcher <mark27q1@gmail.com> - 2016-08-05 02:10 +0200
  Re: Limiting internet access by time Lars Noodén <lars.nooden@gmail.com> - 2016-08-05 09:30 +0200
    Re: Limiting internet access by time Mark Fletcher <mark27q1@gmail.com> - 2016-08-05 17:40 +0200
  Re: Limiting internet access by time Brian <ad44@cityscape.co.uk> - 2016-08-05 12:50 +0200
    Re: Limiting internet access by time Lisi Reisz <lisi.reisz@gmail.com> - 2016-08-05 13:10 +0200
      Re: Limiting internet access by time Brian <ad44@cityscape.co.uk> - 2016-08-05 16:10 +0200
        Re: Limiting internet access by time David Wright <deblis@lionunicorn.co.uk> - 2016-08-05 18:00 +0200
        Re: Limiting internet access by time Mark Fletcher <mark27q1@gmail.com> - 2016-08-05 18:00 +0200
          Re: Limiting internet access by time Dan Ritter <dsr@randomstring.org> - 2016-08-05 19:50 +0200
            Re: Limiting internet access by time Brian <ad44@cityscape.co.uk> - 2016-08-05 21:10 +0200
              Re: Limiting internet access by time Brian <ad44@cityscape.co.uk> - 2016-08-06 03:40 +0200
            Re: Limiting internet access by time Mark Fletcher <mark27q1@gmail.com> - 2016-08-06 07:30 +0200
              Re: Limiting internet access by time Dan Ritter <dsr@randomstring.org> - 2016-08-07 03:00 +0200
                Re: Limiting internet access by time Mark Fletcher <mark27q1@gmail.com> - 2016-08-07 05:40 +0200
                Re: Limiting internet access by time Brian <ad44@cityscape.co.uk> - 2016-08-07 20:20 +0200
                Re: Limiting internet access by time Mark Fletcher <mark27q1@gmail.com> - 2016-08-08 02:10 +0200
                Re: Limiting internet access by time Dan Ritter <dsr@randomstring.org> - 2016-08-09 19:30 +0200
                Re: Limiting internet access by time Stefan Monnier <monnier@iro.umontreal.ca> - 2016-08-09 21:20 +0200
                Re: Limiting internet access by time Dan Ritter <dsr@randomstring.org> - 2016-08-10 15:40 +0200
                Re: Limiting internet access by time Stefan Monnier <monnier@iro.umontreal.ca> - 2016-08-10 17:00 +0200
                Re: Limiting internet access by time Dan Ritter <dsr@randomstring.org> - 2016-08-10 18:10 +0200
                Re: Limiting internet access by time Stefan Monnier <monnier@iro.umontreal.ca> - 2016-08-10 22:40 +0200
          Re: Limiting internet access by time Brian <ad44@cityscape.co.uk> - 2016-08-05 20:50 +0200
            Re: Limiting internet access by time Mark Fletcher <mark27q1@gmail.com> - 2016-08-06 07:30 +0200
      Re: Limiting internet access by time Mark Fletcher <mark27q1@gmail.com> - 2016-08-05 16:30 +0200
        Re: Limiting internet access by time pv29@gatech.edu - 2016-08-08 01:10 +0200
          Re: Limiting internet access by time Curt <curty@free.fr> - 2016-08-08 09:00 +0200
            Re: Limiting internet access by time pascalv@sdf.org - 2016-08-08 10:30 +0200
              Re: Limiting internet access by time Karol Augustin <karol@augustin.pl> - 2016-08-08 12:00 +0200

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