crontab

# do daily/weekly/monthly maintenance
# min	hour	day	month	weekday	command
*/15	*	*	*	*	run-parts /etc/periodic/15min
0	*	*	*	*	run-parts /etc/periodic/hourly
0	2	*	*	*	run-parts /etc/periodic/daily
0	3	*	*	6	run-parts /etc/periodic/weekly
0	5	1	*	*	run-parts /etc/periodic/monthly


# Block the following IP addresses at 9PM.
# Uncomment one of the two lines below. The first one will not log any output from the script. The second will send it to a text file.
#0	21	*	*	*	 /usr/bin/php /add_block_firewall.php 192.168.200.10 192.168.200.11 192.168.200.12  > /dev/null
#0	21	*	*	*	 /usr/bin/php /add_block_firewall.php 192.168.200.10 192.168.200.11 192.168.200.12    >> /var/log/blockfile.txt 2>&1


# Unblock these IP addresses at 7AM. The same applies here.
#0	7	*	*	*	 /usr/bin/php /del_block_firewall.php 192.168.200.10 192.168.200.11 192.168.200.12  > /dev/null
#0	7	*	*	*	 /usr/bin/php /del_block_firewall.php 192.168.200.10 192.168.200.11 192.168.200.12    >> /var/log/blockfile.txt 2>&1