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672 richard 1
#/bin/bash
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# $Id: alcasar-bl.sh 885 2012-06-11 21:33:50Z richard $
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# alcasar-bl.sh
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# by Franck BOUIJOUX and Richard REY
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# This script is distributed under the Gnu General Public License (GPL)
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# Gestion de la BL pour le filtrage de domaine (via dnsmasq) et d'URL (via Dansguardian)
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# Manage the BL for DnsBlackHole (dnsmasq) and URL filtering (Dansguardian)
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DIR_CONF="/usr/local/etc"
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CONF_FILE="$DIR_CONF/alcasar.conf"
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private_ip_mask=`grep PRIVATE_IP= $CONF_FILE|cut -d"=" -f2`
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private_ip_mask=${private_ip_mask:=192.168.182.1/24}
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PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1`			# ALCASAR LAN IP address
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DIR_tmp="/tmp/blacklists"
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FILE_tmp="/tmp/fileFilter.txt"
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DIR_DG="/etc/dansguardian/lists"
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DIR_DG_BL="$DIR_DG/blacklists"
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BL_CATEGORIES="$DIR_CONF/alcasar-bl-categories"
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WL_CATEGORIES="$DIR_CONF/alcasar-wl-categories"
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BL_CATEGORIES_ENABLED="$DIR_CONF/alcasar-bl-categories-enabled"
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DIR_DNS_FILTER_AVAILABLE="$DIR_CONF/alcasar-dnsfilter-available"
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DIR_DNS_FILTER_ENABLED="$DIR_CONF/alcasar-dnsfilter-enabled"
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BL_SERVER="dsi.ut-capitole.fr"
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SED="/bin/sed -i"
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# Permet d'activer/désactiver les catégories de la BL
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function cat_choice (){
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	# un peu de ménage
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	rm -rf $DIR_DNS_FILTER_ENABLED/*
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	$SED "/\.Include/d" $DIR_DG/bannedsitelist $DIR_DG/bannedurllist
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	# on adapte le fichier $BL_CATEGORIES au choix de catégorie 
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	$SED "s?^[^#]?#&?g" $BL_CATEGORIES # on commente ce qui ne l'est pas
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	for ENABLE_CATEGORIE in `cat $BL_CATEGORIES_ENABLED` # on affecte les catégories à dansguardian et dnsmasq
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	do
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		$SED "/\/$ENABLE_CATEGORIE$/d" $BL_CATEGORIES
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		$SED "1i\/etc\/dansguardian\/lists\/blacklists\/$ENABLE_CATEGORIE" $BL_CATEGORIES
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		ln -s $DIR_DNS_FILTER_AVAILABLE/$ENABLE_CATEGORIE.conf $DIR_DNS_FILTER_ENABLED/$ENABLE_CATEGORIE
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		echo ".Include<$DIR_DG_BL/$ENABLE_CATEGORIE/domains>" >> $DIR_DG/bannedsitelist  # dansguardian s'occupe du contournement par proxy http ;-)
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		echo ".Include<$DIR_DG_BL/$ENABLE_CATEGORIE/urls>" >> $DIR_DG/bannedurllist
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	done
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	sort +0.0 -0.2 $BL_CATEGORIES -o $FILE_tmp
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	mv $FILE_tmp $BL_CATEGORIES
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}
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function bl_enable (){
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	$SED "s/^reportinglevel =.*/reportinglevel = 3/g" /etc/dansguardian/dansguardian.conf
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	if [ "$PARENT_SCRIPT" != "/usr/local/bin/alcasar-conf.sh" ] # don't launch on install stage
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	then
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		service dansguardian restart
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		service dnsmasq restart
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		/usr/local/bin/alcasar-iptables.sh
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	fi
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}
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function bl_disable (){
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	rm -rf $DIR_DNS_FILTER_ENABLED/*
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	$SED "s/^reportinglevel =.*/reportinglevel = -1/g" /etc/dansguardian/dansguardian.conf
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	if [ "$PARENT_SCRIPT" != "/usr/local/bin/alcasar-conf.sh" ] # don't launch on install stage
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	then
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		service dansguardian restart
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		service dnsmasq restart
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		/usr/local/bin/alcasar-iptables.sh
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	fi
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}
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usage="Usage: alcasar-bl.sh {-on or --on} | { -off or --off } | { -download or --download } | { -reload or --reload }"
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nb_args=$#
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args=$1
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if [ $nb_args -eq 0 ]
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then
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	DNS_FILTERING=`grep DNS_FILTERING $CONF_FILE|cut -d"=" -f2`		# DNS and URLs filter (on/off)
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	DNS_FILTERING=${DNS_FILTERING:=off}
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	echo "Set BlackList Filtering to $DNS_FILTERING"
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	if [ $DNS_FILTERING = on ]; then
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		cat_choice
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		bl_enable
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	else
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		bl_disable
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	fi
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	exit 0
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fi
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case $args in
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	-\? | -h* | --h*)
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		echo "$usage"
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		exit 0
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		;;
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	# activation du filtrage
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	-on | --on)	
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		cat_choice
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		$SED "s?^DNS_FILTERING.*?DNS_FILTERING=on?g" $CONF_FILE
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		bl_enable
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		;;
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	# désactivation du filtrage
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	-off | --off)
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		$SED "s?^DNS_FILTERING.*?DNS_FILTERING=off?g" $CONF_FILE
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		bl_disable
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		;;
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	# Récupération de l'archive de la BL Toulouse
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	-download | --download)
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		rm -rf /tmp/con_ok.html
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		`/usr/bin/curl $BL_SERVER -# -o /tmp/con_ok.html`
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		if [ ! -e /tmp/con_ok.html ]
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		then
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			echo "Erreur : le serveur de blacklist ($BL_SERVER) n'est pas joignable"
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		else 
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			rm -rf /tmp/con_ok.html $DIR_tmp
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			mkdir $DIR_tmp
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			wget -P $DIR_tmp http://$BL_SERVER/blacklists/download/blacklists.tar.gz
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			md5sum $DIR_tmp/blacklists.tar.gz | cut -d" " -f1 > $DIR_tmp/md5sum
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			chown -R apache:apache $DIR_tmp
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		fi
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		;;		
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	# Adaptation de la BL de Toulouse à notre structure (dnsmasq + DG)
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	-adapt | --adapt)
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		if [ -f $DIR_tmp/blacklists.tar.gz ]
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		then
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			[ -d $DIR_DG_BL/ossi ] && mv -f $DIR_DG_BL/ossi $DIR_tmp
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			rm -rf $DIR_DG_BL
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			mkdir $DIR_DG_BL
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			tar zxf $DIR_tmp/blacklists.tar.gz --directory=$DIR_DG/
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			[ -d $DIR_tmp/ossi ] && mv -f $DIR_tmp/ossi $DIR_DG_BL/
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			rm -rf $DIR_tmp
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			chown -R dansguardian:apache $DIR_DG
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			chmod -R g+w $DIR_DG
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		fi
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		rm -f $BL_CATEGORIES $WL_CATEGORIES $DIR_DNS_FILTER_AVAILABLE/*
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		touch $BL_CATEGORIES $WL_CATEGORIES
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		find $DIR_DG_BL/ -type f -name domains > $FILE_tmp # On récupère le nom des répertoire (catégories)
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		$SED "s?\/domains??g" $FILE_tmp # On supprime le suffixe "/domains"
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		for categorie in `cat $FILE_tmp` # creation des deux fichiers de categories (BL / WL)
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		do
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			if [ -e $categorie/usage ]
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			then
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				is_whitelist=`grep white $categorie/usage|wc -l`
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			else
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				is_whitelist=0 # si le fichier 'usage' n'existe pas, on considère que la catégorie est une BL
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			fi
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			if [ $is_whitelist -eq "0" ]
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			then
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				echo "$categorie" >> $BL_CATEGORIES
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			else
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				echo "$categorie" >> $WL_CATEGORIES
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			fi
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		done
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		rm -f $FILE_tmp
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		echo -n "Toulouse BlackList migration process. Please wait : "
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		for PATH_FILE in `cat $BL_CATEGORIES`  # pour chaque catégorie
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		do
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			echo -n "."
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		  	if [ ! -f $PATH_FILE/urls ] # on crée le fichier 'urls' s'il n'existe pas
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			then
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				touch $PATH_FILE/urls
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				chown dansguardian:apache $PATH_FILE/urls
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			fi
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			# suppression des @IP, de caractères acccentués et des lignes commentées
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			egrep  -v "([0-9]{1,3}\.){3}[0-9]{1,3}" $PATH_FILE/domains > $FILE_tmp
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			$SED "/[äâëêïîöôüû]/d" $FILE_tmp
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			$SED "/^#.*/d" $FILE_tmp
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			$SED "s?.*?address=/&/$PRIVATE_IP?g" $FILE_tmp  # Mise en forme dnsmasq
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			DOMAINE=`basename $PATH_FILE`
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			mv $FILE_tmp $DIR_DNS_FILTER_AVAILABLE/$DOMAINE.conf
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		done
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		echo
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		;;
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	# regénération suite à modification du choix des catégories 
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	-reload | --reload)
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		# pour Dansguardian
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		chown -R dansguardian:apache $DIR_DG_BL/ossi
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		chmod -R g+w $DIR_DG_BL/ossi
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		cat_choice
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		# pour dnsmasq (noms de domaine réhabilités)
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		if [ `wc -w $DIR_DG/exceptionsitelist|cut -d " " -f1` != "0" ]
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		then
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			for i in `cat $DIR_DG/exceptionsitelist`
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			do
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				$SED "/$i/d" $DIR_DNS_FILTER_AVAILABLE/*
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			done
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		fi
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		cp -f $DIR_DG_BL/ossi/domains $DIR_DNS_FILTER_AVAILABLE/ossi.conf
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		$SED "s?.*?address=/&/$PRIVATE_IP?g" $DIR_DNS_FILTER_AVAILABLE/ossi.conf
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		DNS_FILTERING=`grep DNS_FILTERING $CONF_FILE|cut -d"=" -f2`		# DNS and URLs filter (on/off)
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		DNS_FILTERING=${DNS_FILTERING:=off}
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		if [ $DNS_FILTERING = on ]; then
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			bl_enable
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		else
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			bl_disable
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		fi
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		;;
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	*)
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		echo "Argument inconnu :$1";
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		echo "$usage"
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		exit 1
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		;;
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esac
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