my internet-regulation crontab

crontab

# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.

#===============================================================================
# Documentation:
  # https://askubuntu.com/questions/2368/how-do-i-set-up-a-cron-job
  # https://askubuntu.com/questions/1031552/re-create-default-crontab
  # https://gist.githubusercontent.com/ellvtr/c9f804e277d8bd3683766115c68a7877/raw/e6bcdbea7e89b95b75252fe593046fb7cd82ec53/crontab
#===============================================================================

SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

# m h dom mon dow user  command
17 *    * * *   root    cd / && run-parts --report /etc/cron.hourly
25 6    * * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6    * * 7   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6    1 * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
#






#===============================================================================
#   minute hour day-of-month month-of-year day-of-week user-to-run-as command
#===============================================================================




# every minute (11:00 P.M., 11:01 P.M., 11:02 P.M., etc.)

#=====================================================================
# re-allow internet
#  6:00 P.M.  (6:00 P.M., 6:01 P.M., 6:02 P.M., ...,  etc.)
*/1  6 * * * root iptables -P INPUT ACCEPT
*/1  7 * * * root iptables -P INPUT ACCEPT
# get started on work
*/1  8 * * * root iptables -P INPUT DROP
*/1  9 * * * root iptables -P INPUT DROP
*/1 10 * * * root iptables -P INPUT ACCEPT
*/1 11 * * * root iptables -P INPUT ACCEPT
*/1 12 * * * root iptables -P INPUT ACCEPT
*/1 13 * * * root iptables -P INPUT ACCEPT
# mid-afternoon dip: discourage slacking
*/1 14 * * * root iptables -P INPUT DROP
*/1 15 * * * root iptables -P INPUT DROP
# Tutoring (might be good to have the interwebs)
*/1 16 * * * root iptables -P INPUT ACCEPT
*/1 17 * * * root iptables -P INPUT ACCEPT
*/1 18 * * * root iptables -P INPUT ACCEPT

#=====================================================================
# KILL internet
#  7:00 P.M.  (7:00 P.M., 7:01 P.M., 7:02 P.M., ...,  etc.)
#  8:00 P.M.  (8:00 P.M., 8:01 P.M., 8:02 P.M., ...,  etc.)
#  9:00 P.M.  (9:00 P.M., 9:01 P.M., 9:02 P.M., ...,  etc.)
# 10:00 P.M.  (10:00 P.M., 10:01 P.M., 10:02 P.M., ...,  etc.)
# 11:00 P.M.  (11:00 P.M., 11:01 P.M., 11:02 P.M., ...,  etc.)
*/1 19 * * * root iptables -P INPUT DROP
*/1 20 * * * root iptables -P INPUT DROP
*/1 21 * * * root iptables -P INPUT DROP
*/1 22 * * * root iptables -P INPUT DROP
*/1 23 * * * root iptables -P INPUT DROP