WebSVN – ALCASAR – Diff – /scripts/alcasar-iptables.sh

 #!/bin/bash
-# $Id: alcasar-iptables.sh 1392 2014-06-18 22:23:02Z richard $
+# $Id: alcasar-iptables.sh 1393 2014-06-19 08:44:51Z richard $
 # Script de mise en place des regles du parefeu d'Alcasar (mode normal)
 # This script writes the netfilter rules for ALCASAR
 # Rexy - 3abtux - CPN
+#
 # Reminders
 PROTOCOLS_FILTERING=`grep ^PROTOCOLS_FILTERING= $conf_file|cut -d"=" -f2`	# Network protocols filter (on/off)
 PROTOCOLS_FILTERING=${PROTOCOLS_FILTERING:=off}
 BL_IP_CAT="/usr/local/share/iptables-bl-enabled"			# categories files of the BlackListed IP
 BL_IP_OSSI="/usr/local/share/iptables-bl/ossi"				# ossi categoty
 WL_IP_OSSI="/usr/local/share/ossi-ip-wl"				# ip of the whitelist
+DNSMASQ_WL_ENABLED="/usr/local/share/dnsmasq-wl-enabled"		# enabled domain names for the Whitelist
 TMP_users_set_save="/tmp/users_set_save"				# tmp file for backup users set
 TMP_set_save="/tmp/ipset_save"						# tmp file for blacklist and whitelist creation
 QOS=`grep ^QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
 QOS=${QOS:=off}
 SSH=`grep ^SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
 # destroy all SET
 ipset destroy
 # Calcul de la taille du set de la blacklist
 # Compute the blacklist set length
-cd $BL_IP_CAT
-set_bl_length=$(($(wc -l * | awk '{print $1}' | tail -n 1)+$(wc -l $BL_IP_OSSI | awk '{print $1}')))
+bl_set_length=$(($(wc -l $BL_IP_CAT/* | awk '{print $1}' | tail -n 1)+$(wc -l $BL_IP_OSSI | awk '{print $1}')))
 # Création du fichier set temporaire, remplissage, chargement et suppression
 # Creating the temporary set file, filling, loading and deleting
-echo "create blacklist_ip_blocked hash:net family inet hashsize 1024 maxelem $set_bl_length" > $TMP_set_save
+echo "create blacklist_ip_blocked hash:net family inet hashsize 1024 maxelem $bl_set_length" > $TMP_set_save
-for category in `ls -1 | cut -d '@' -f1`
+for category in `ls -1 $BL_IP_CAT | cut -d '@' -f1`
 do
 	cat $BL_IP_CAT/$category >> $TMP_set_save
 done
 cat $BL_IP_OSSI >> $TMP_set_save
 ipset -! restore < $TMP_set_save
 for ip in $(cat $IP_REHABILITEES)
 do
 	ipset del blacklist_ip_blocked $ip
 done
+# Calcul de la taille du set de la whitelist
+# Compute the whitelist set length
+wl_set_length=$(($(wc -l $DNSMASQ_WL_ENABLED/* | awk '{print $1}' | tail -n 1)*3))
 # Création du fichier set temporaire, remplissage, chargement et suppression
 # Creating the temporary set file, filling, loading and deleting
-echo "create whitelist_ip_allowed hash:net family inet hashsize 1024" > $TMP_set_save
+echo "create whitelist_ip_allowed hash:net family inet hashsize 1024 maxelem $wl_set_length" > $TMP_set_save
 cat $WL_IP_OSSI >> $TMP_set_save
 ipset -! restore < $TMP_set_save
 rm -f $TMP_set_save
 # Restoration des SET des utilisateurs connectés si ils existent sinon création des SET
 # Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8091 pour pouvoir les rejeter en INPUT
 # Mark (and log) the 8091 direct attempts to REJECT them in INPUT rules
 $IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8091 -j MARK --set-mark 5
-# Aiguillage des flux DNS
-# Switching DNS streams
 # havp_bl_set --> redirection vers le port 54
 # havp_bl_set --> redirect to port 54
 $IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl_set src -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
 # havp_wl_set --> redirection vers le port 55
 # havp_wl_set --> redirect to port 55
 $IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl_set src -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 55
 # Redirection des requêtes HTTP des IP de la blacklist vers ALCASAR (page 'accès interdit') pour le set havp_bl_set
+# Redirect outbound HTTP requests from blacklist IP to ALCASAR ('access denied' page) for the set havp_bl_set
 $IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl_set src -m set --match-set blacklist_ip_blocked dst -p tcp --dport http -j REDIRECT --to-port 80
+# Redirection des requêtes HTTP des IP qui ne sont pas dans la whitelist vers ALCASAR (page 'accès interdit') pour le set havp_wl_set
+# Redirect outbound HTTP requests from IP which are not in the whitelist to ALCASAR ('access denied' page) for the set havp_wl_set
+$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl_set src -m set ! --match-set whitelist_ip_allowed dst -p tcp --dport http -j REDIRECT --to-port 80
 # Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
 ## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
 $IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -m state --state NEW -j ULOG --ulog-prefix "RULE F_http -- ACCEPT "
 # Redirection des requêtes HTTP sortantes vers HAVP (8091) pour le set havp_set
 # Deny and log on INPUT from the LAN
 $IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
 $IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 $IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
-# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
+# Interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
 # Reject INTIF access (only when chilli is down)
 $IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
 $IPTABLES -A INPUT -i $INTIF -j REJECT
 # Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)

Subversion Repositories ALCASAR

(root)/scripts/alcasar-iptables.sh @ 2668 – Rev 1392 → 1393