Firewall to be stored in /etc/init.d as filename firewall

firewall

#! /bin/sh
### BEGIN INIT INFO
# Provides:          iptables
# Required-Start:    $remote_fs
# Required-Stop:     $remote_fs
# Should-Start:      $network $syslog
# Should-Stop:       $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Firewall script
# Description:       Start iptables-based firewall
### END INIT INFO

RETVAL=0

do_start() {
    /etc/firewall.sh
    /etc/init.d/fail2ban restart
    RETVAL=0
}

do_stop() {
    /etc/flush_iptables.sh
    /etc/init.d/fail2ban restart
    RETVAL=0
}

case $1 in
start)
do_start
 ;;
stop)
do_stop
 ;;
restart)
do_stop
do_start
 ;;
status)
/sbin/iptables -L
RETVAL=0
 ;;
*)
echo "Usage: firewall {start|stop|restart|status}"
RETVAL=1
esac

exit