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#!/bin/bashinfo=`cat /var/log/wirefall | grep "$1"`if [ "$info" != "" ]then	exist="yes"else	exist="no"fiif [ ! -e /var/log/wirefall ]then touch /var/log/wirefallfiif [ "$2" == "on" ]then	if [ "$exist" = "yes" ]	then		echo "Error: $1 already blocked"		exit 1	else        APPEND="-A"        INSERT="-I"	echo $1 >> /var/log/wirefall	echo "$1 locked"	fielif [ "$2" == "off" ]then	info=`cat /var/log/wirefall | grep "$1"`	if [ "$exist" = "no" ]	then		echo "Error: $1 not locked"		exit 1	else        APPEND="-D"        INSERT="-D"	touch /var/log/delete	cat /var/log/wirefall | grep -v $1 > /var/log/delete 	mv /var/log/delete /var/log/wirefall	echo "$1 unlocked"	fielse        echo "Usage: IP "	echo "\"on\" or \"off\" are expected as second argument"	exit 1fi	#iptables $INSERT INPUT   -s $1 -j DROP#iptables $INSERT OUTPUT  -d $1 -j DROP#iptables $INSERT FORWARD -d $1 -j DROP #echo "IP \"${1}\" drop ${2}."exit 0