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#!/bin/bash
 1 
#!/bin/bash
2 
# $Id: alcasar-iptables.sh 1332 2014-04-23 12:40:53Z richard $
 2 
# $Id: alcasar-iptables.sh 1339 2014-05-05 12:55:57Z richard $
3 
# Script de mise en place des regles du parefeu d'Alcasar (mode normal)
 3 
# Script de mise en place des regles du parefeu d'Alcasar (mode normal)
4 
# This script write the netfilter rules for ALCASAR
 4 
# This script writes the netfilter rules for ALCASAR
5 
# Rexy - 3abtux - CPN
 5 
# Rexy - 3abtux - CPN
6 
#
 6 
#
7 
# Reminders
 7 
# Reminders
8 
# There are four channels for log :
 8 
# There are four channels for log :
9 
#	1 tracability of the consultation equipment with The 'Netflow' kernel module (iptables target = NETFLOW);
 9 
#	1 tracability of the consultation equipment with The 'Netflow' kernel module (iptables target = NETFLOW);
10 
#	2 protection of ALCASAR with the Ulog group 1 (default group)
10 
#	2 protection of ALCASAR with the Ulog group 1 (default group)
11 
#	3 SSH on ALCASAR with the Ulog group 2;
 11 
#	3 SSH on ALCASAR with the Ulog group 2;
12 
#	4 extern access attempts on ALCASAR with the Ulog group 3.
 12 
#	4 extern access attempts on ALCASAR with the Ulog group 3.
13 
# The bootps/dhcp (67) port is always open on tun0/eth1 by coova
13 
# The bootps/dhcp (67) port is always open on tun0/eth1 by coova
14 
conf_file="/usr/local/etc/alcasar.conf"
 14 
conf_file="/usr/local/etc/alcasar.conf"
15 
private_ip_mask=`grep PRIVATE_IP= $conf_file|cut -d"=" -f2`
 15 
private_ip_mask=`grep PRIVATE_IP= $conf_file|cut -d"=" -f2`
16 
private_ip_mask=${private_ip_mask:=192.168.182.1/24}
 16 
private_ip_mask=${private_ip_mask:=192.168.182.1/24}
17 
PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1`			# ALCASAR LAN IP address
 17 
PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1`			# ALCASAR LAN IP address
18 
private_network=`/bin/ipcalc -n $private_ip_mask|cut -d"=" -f2`		# LAN IP address (ie.: 192.168.182.0)
 18 
private_network=`/bin/ipcalc -n $private_ip_mask|cut -d"=" -f2`		# LAN IP address (ie.: 192.168.182.0)
19 
private_prefix=`/bin/ipcalc -p $private_ip_mask|cut -d"=" -f2`		# LAN prefix (ie. 24)
 19 
private_prefix=`/bin/ipcalc -p $private_ip_mask|cut -d"=" -f2`		# LAN prefix (ie. 24)
20 
PRIVATE_NETWORK_MASK=$private_network/$private_prefix			# Lan IP address + prefix (192.168.182.0/24)
 20 
PRIVATE_NETWORK_MASK=$private_network/$private_prefix			# Lan IP address + prefix (192.168.182.0/24)
21 
public_ip_mask=`grep PUBLIC_IP= $conf_file|cut -d"=" -f2`		# ALCASAR WAN IP address
 21 
public_ip_mask=`grep PUBLIC_IP= $conf_file|cut -d"=" -f2`		# ALCASAR WAN IP address
22 
PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1`
 22 
PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1`
23 
dns1=`grep DNS1= $conf_file|cut -d"=" -f2`				# first public DNS server
 23 
dns1=`grep DNS1= $conf_file|cut -d"=" -f2`				# first public DNS server
24 
dns1=${dns1:=208.67.220.220}
 24 
dns1=${dns1:=208.67.220.220}
25 
dns2=`grep DNS2= $conf_file|cut -d"=" -f2`				# second public DNS server
 25 
dns2=`grep DNS2= $conf_file|cut -d"=" -f2`				# second public DNS server
26 
dns2=${dns2:=208.67.222.222}
 26 
dns2=${dns2:=208.67.222.222}
27 
DNSSERVERS="$dns1,$dns2"						# first and second DNS IP servers addresses
 27 
DNSSERVERS="$dns1,$dns2"						# first and second DNS IP servers addresses
28 
PROTOCOLS_FILTERING=`grep PROTOCOLS_FILTERING= $conf_file|cut -d"=" -f2`	# Network protocols filter (on/off)
 28 
PROTOCOLS_FILTERING=`grep PROTOCOLS_FILTERING= $conf_file|cut -d"=" -f2`	# Network protocols filter (on/off)
29 
PROTOCOLS_FILTERING=${PROTOCOLS_FILTERING:=off}
 29 
PROTOCOLS_FILTERING=${PROTOCOLS_FILTERING:=off}
30 
DNS_FILTERING=`grep DNS_FILTERING= $conf_file|cut -d"=" -f2`		# DNS and URLs filter (on/off)
 30 
DNS_FILTERING=`grep DNS_FILTERING= $conf_file|cut -d"=" -f2`		# DNS and URLs filter (on/off)
31 
DNS_FILTERING=${DNS_FILTERING:=off}
 31 
DNS_FILTERING=${DNS_FILTERING:=off}
32 
BL_IP_CAT="/usr/local/share/iptables-bl-enabled"			# categories files of the BlackListed IP
 32 
BL_IP_CAT="/usr/local/share/iptables-bl-enabled"			# categories files of the BlackListed IP
- 
 
 33 
BL_IP_OSSI="/usr/local/share/iptables-bl/ossi"				# ossi categoty
33 
QOS=`grep QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
 34 
QOS=`grep QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
34 
QOS=${QOS:=off}
 35 
QOS=${QOS:=off}
35 
SSH=`grep SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
 36 
SSH=`grep SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
36 
SSH=${SSH:=off}
 37 
SSH=${SSH:=off}
37 
SSH_ADMIN_FROM=`grep SSH_ADMIN_FROM= $conf_file|cut -d"=" -f2`
 38 
SSH_ADMIN_FROM=`grep SSH_ADMIN_FROM= $conf_file|cut -d"=" -f2`
38 
SSH_ADMIN_FROM=${SSH_ADMIN_FROM:="0.0.0.0/0.0.0.0"}			# WAN IP address to reduce ssh access (all ip allowed on LAN side)
 39 
SSH_ADMIN_FROM=${SSH_ADMIN_FROM:="0.0.0.0/0.0.0.0"}			# WAN IP address to reduce ssh access (all ip allowed on LAN side)
39 
LDAP=`grep LDAP= $conf_file|cut -d"=" -f2`				# LDAP external server active (on/off)
 40 
LDAP=`grep LDAP= $conf_file|cut -d"=" -f2`				# LDAP external server active (on/off)
40 
LDAP=${LDAP:=off}
 41 
LDAP=${LDAP:=off}
41 
LDAP_IP=`grep LDAP_IP= $conf_file|cut -d"=" -f2`			# WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
 42 
LDAP_IP=`grep LDAP_IP= $conf_file|cut -d"=" -f2`			# WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
42 
LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
 43 
LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
43 
EXTIF="eth0"
 44 
EXTIF="eth0"
44 
INTIF="eth1"
 45 
INTIF="eth1"
45 
TUNIF="tun0"								# listen device for chilli daemon
 46 
TUNIF="tun0"								# listen device for chilli daemon
46 
IPTABLES="/sbin/iptables"
 47 
IPTABLES="/sbin/iptables"
47 
 
 - 
 
- 
 
 48 
IP_REHABILITEES="/etc/dansguardian/lists/exceptioniplist"		# Rehabilitated IP
48 
 
 49 
 
49 
# loading of NetFlow probe (ipt_NETFLOW kernel module)
 50 
# loading of NetFlow probe (ipt_NETFLOW kernel module)
50 
modprobe ipt_NETFLOW destination=127.0.0.1:2055
 51 
modprobe ipt_NETFLOW destination=127.0.0.1:2055
51 
 
 52 
 
52 
# Effacement des règles existantes
 53 
# Effacement des règles existantes
53 
# Flush all existing rules
 54 
# Flush all existing rules
54 
$IPTABLES -F
 55 
$IPTABLES -F
55 
$IPTABLES -t nat -F
 56 
$IPTABLES -t nat -F
56 
$IPTABLES -t mangle -F
 57 
$IPTABLES -t mangle -F
57 
$IPTABLES -F INPUT
 58 
$IPTABLES -F INPUT
58 
$IPTABLES -F FORWARD
 59 
$IPTABLES -F FORWARD
59 
$IPTABLES -F OUTPUT
 60 
$IPTABLES -F OUTPUT
60 
 
 61 
 
61 
# Suppression des chaines utilisateurs sur les tables filter et nat
 62 
# Suppression des chaines utilisateurs sur les tables filter et nat
62 
# Flush non default rules on filter and nat tables
 63 
# Flush non default rules on filter and nat tables
63 
$IPTABLES -X
 64 
$IPTABLES -X
64 
$IPTABLES -t nat -X
 65 
$IPTABLES -t nat -X
65 
 
 66 
 
66 
# Stratégies par défaut
 67 
# Stratégies par défaut
67 
# Default policies
 68 
# Default policies
68 
$IPTABLES -P INPUT DROP
 69 
$IPTABLES -P INPUT DROP
69 
$IPTABLES -P FORWARD DROP
 70 
$IPTABLES -P FORWARD DROP
70 
$IPTABLES -P OUTPUT DROP
 71 
$IPTABLES -P OUTPUT DROP
71 
$IPTABLES -t nat -P PREROUTING ACCEPT
 72 
$IPTABLES -t nat -P PREROUTING ACCEPT
72 
$IPTABLES -t nat -P POSTROUTING ACCEPT
 73 
$IPTABLES -t nat -P POSTROUTING ACCEPT
73 
$IPTABLES -t nat -P OUTPUT ACCEPT
 74 
$IPTABLES -t nat -P OUTPUT ACCEPT
74 
 
 75 
 
75 
# destruction de tous les SET
 76 
# destruction de tous les SET
76 
# destroy all SET
 77 
# destroy all SET
77 
ipset destroy
 78 
ipset destroy
78 
 
 79 
 
79 
# Création et peuplement du SET alcasar_ip_blocked
 - 
 
80 
# creation and first populating of alcasar_ip_blocked SET
 - 
 
81 
ipset create alcasar_ip_blocked hash:net hashsize 1024
 - 
 
82 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
- 
 
83 
	while read ip_line
 - 
 
84 
	do
 - 
 
85 
		ip_on=`echo $ip_line|cut -b1`
 - 
 
86 
		if [ $ip_on != "#" ]
 - 
 
87 
		then
- 
 
88 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
 - 
 
89 
			ipset add alcasar_ip_blocked $ip_blocked
 - 
 
90 
		fi
 - 
 
91 
	done < /usr/local/etc/alcasar-ip-blocked
 - 
 
92 
fi
 - 
 
93 
 
 - 
 
94 
# Création et initialisation du SET authenticated_ip (dynamiquement peuplé par les scripts conup/condown)
 80 
# Création et initialisation du SET authenticated_ip (dynamiquement peuplé par les scripts conup/condown)
95 
# creation and initialization of authenticated_ip_ SET (populated dynamicly by conup/condown scripts)
 81 
# creation and initialization of authenticated_ip_ SET (populated dynamicly by conup/condown scripts)
96 
ipset create authenticated_ip hash:net hashsize 1024
 82 
ipset create authenticated_ip hash:net hashsize 1024
97 
OLDIFS=$IFS
 83 
OLDIFS=$IFS
98 
IFS=$'\n'
 84 
IFS=$'\n'
99 
for equipment in `/usr/sbin/chilli_query list |grep -v "\.0\.0\.0"`
 85 
for equipment in `/usr/sbin/chilli_query list |grep -v "\.0\.0\.0"`
100 
do
 86 
do
101 
	active_ip=`echo $equipment |cut -d" " -f2`
 87 
	active_ip=`echo $equipment |cut -d" " -f2`
102 
	active_session=`echo $equipment |cut -d" " -f5`
 88 
	active_session=`echo $equipment |cut -d" " -f5`
103 
	if [[ $(expr $active_session) -eq 1 ]]
 89 
	if [[ $(expr $active_session) -eq 1 ]]
104 
	then
 90 
	then
105 
		ipset add authenticated_ip $active_ip
 91 
		ipset add authenticated_ip $active_ip
106 
	fi
 92 
	fi
107 
done
 93 
done
108 
IFS=$OLDIFS
 94 
IFS=$OLDIFS
109 
 
 95 
 
110 
# Calcul de la taille du SET blacklist_ip_blocked
 96 
# Calcul de la taille de l'ipset
111 
# Computing the length of the blacklist_ip_blocked set
 - 
 
112 
cd $BL_IP_CAT
 97 
cd $BL_IP_CAT
113 
ipset_length=$(wc -l * | awk '{print $1}' | tail -n 1)
 98 
ipset_length=$(($(wc -l * | awk '{print $1}' | tail -n 1)+$(wc -l $BL_IP_OSSI | awk '{print $1}')))
114 
 
 - 
 
115 
# Ajout du delta (ip entrées manuellement)
 - 
 
116 
# Addition of the delta (ip entered manually)
 - 
 
117 
((ipset_length=$ipset_length+10))
 - 
 
118 
 
 99 
 
119 
# Création du fichier ipset temporaire, remplissage, chargement et suppression
 100 
# Création du fichier set temporaire, remplissage, chargement et suppression
120 
echo "create blacklist_ip_blocked hash:net family inet hashsize 1024 maxelem $ipset_length" > ipset_save
 101 
echo "create blacklist_ip_blocked hash:net family inet hashsize 1024 maxelem $ipset_length" > /tmp/ipset_save
121 
for category in `ls -1 | cut -d '@' -f1`
 102 
for category in `ls -1 | cut -d '@' -f1`
122 
do
 103 
do
123 
	cat $BL_IP_CAT/$category >> ipset_save
 104 
	cat $BL_IP_CAT/$category >> /tmp/ipset_save
124 
done
 105 
done
- 
 
 106 
cat $BL_IP_OSSI >> /tmp/ipset_save
125 
ipset -! restore < ipset_save
 107 
ipset -! restore < /tmp/ipset_save
126 
rm -f ipset_save
 108 
rm -f /tmp/ipset_save
127 
 
 109 
 
- 
 
 110 
# Extraction des ip réhabilitées
- 
 
 111 
for ip in $(cat $IP_REHABILITEES)
- 
 
 112 
do
- 
 
 113 
	ipset del blacklist_ip_blocked $ip
- 
 
 114 
done
- 
 
 115 
 
128 
# Sauvegarde de tous les ipset (pour restaurer après redémarrage)
 116 
# Sauvegarde de tous les set (pour restaurer après redémarrage)
129 
ipset save > /etc/sysconfig/ipset_save
 117 
ipset save > /etc/sysconfig/ipset_save
130 
 
 118 
 
131 
#############################
 119 
#############################
132 
#       PREROUTING          #
 120 
#       PREROUTING          #
133 
#############################
 121 
#############################
134 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
 122 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
135 
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
 123 
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
136 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j ULOG --ulog-prefix "RULE direct-proxy -- DENY "
 124 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j ULOG --ulog-prefix "RULE direct-proxy -- DENY "
137 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
 125 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
138 
 
 126 
 
139 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
 127 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
140 
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
 128 
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
141 
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
 129 
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
142 
# Remark : this port is only open when filtering is on
 130 
# Remark : this port is only open when filtering is on
143 
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "
 131 
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "
144 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
 132 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
145 
 
 133 
 
146 
# Si le filtrage DNS est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
134 
# Si le filtrage DNS est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
147 
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
 135 
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
148 
if [ $DNS_FILTERING = on ]; then
 136 
if [ $DNS_FILTERING = on ]; then
149 
	# Compute exception IP
 137 
	# Compute exception IP
150 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
 138 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
151 
	if [ $nb_exceptions != "0" ]
 139 
	if [ $nb_exceptions != "0" ]
152 
	then
 140 
	then
153 
		while read ip_exception
141 
		while read ip_exception
154 
		do
 142 
		do
155 
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
 143 
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
156 
		done < /usr/local/etc/alcasar-filter-exceptions
 144 
		done < /usr/local/etc/alcasar-filter-exceptions
157 
	fi
 145 
	fi
158 
		$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
 146 
		$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
159 
fi
 147 
fi
160 
# Redirection des requêtes HTTP des IP admin bannies vers ALCASAR (page 'accès interdit')
 - 
 
161 
# Redirect HTTP requests of admin banned ip to ALCASAR (access deny window)
 - 
 
162 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -m set --match-set alcasar_ip_blocked dst -p tcp --dport http -j REDIRECT --to-port http
 - 
 
163 
 
 148 
 
164 
# Redirection des requêtes HTTP des IP de la blacklist vers ALCASAR (page 'accès interdit')
 149 
# Redirection des requêtes HTTP des IP de la blacklist vers ALCASAR (page 'accès interdit')
165 
# Redirect HTTP requests of blacklist ip to ALCASAR (access deny window)
 150 
# Redirect HTTP requests of blacklist ip to ALCASAR (access deny window)
166 
if [ $DNS_FILTERING = on ]; then
 151 
if [ $DNS_FILTERING = on ]; then
167 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -m set --match-set blacklist_ip_blocked dst -p tcp --dport http -j REDIRECT --to-port 80
 152 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -m set --match-set blacklist_ip_blocked dst -p tcp --dport http -j REDIRECT --to-port 80
168 
fi
 153 
fi
169 
 
 154 
 
170 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
 155 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
171 
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
 156 
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
172 
$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 "
 157 
$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 "
173 
 
 158 
 
174 
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent)
 159 
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent)
175 
# Redirect outbound HTTP requests to DansGuardian (transparent proxy)
 160 
# Redirect outbound HTTP requests to DansGuardian (transparent proxy)
176 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
 161 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
177 
 
 162 
 
178 
# Redirection des requêtes NTP vers le serveur NTP local
 163 
# Redirection des requêtes NTP vers le serveur NTP local
179 
# Redirect NTP request in local NTP server
 164 
# Redirect NTP request in local NTP server
180 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
 165 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
181 
 
 166 
 
182 
#############################
 167 
#############################
183 
#         INPUT             #
 168 
#         INPUT             #
184 
#############################
 169 
#############################
185 
 
 170 
 
186 
# Tout passe sur loopback
 171 
# Tout passe sur loopback
187 
# accept all on loopback
 172 
# accept all on loopback
188 
$IPTABLES -A INPUT -i lo -j ACCEPT
 173 
$IPTABLES -A INPUT -i lo -j ACCEPT
189 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
 174 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
190 
 
 175 
 
191 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
 176 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
192 
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
 177 
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
193 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
 178 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
194 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
 179 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
195 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
 180 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
196 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
 181 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
197 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
 182 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
198 
 
 183 
 
199 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
 184 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
200 
# Drop broadcast & multicast on EXTIF to avoid log
185 
# Drop broadcast & multicast on EXTIF to avoid log
201 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
 186 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
202 
 
 187 
 
203 
# On autorise les retours de connexions légitimes par INPUT
 188 
# On autorise les retours de connexions légitimes par INPUT
204 
# Conntrack on INPUT
 189 
# Conntrack on INPUT
205 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
 190 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
206 
 
 191 
 
207 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
 192 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
208 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
 193 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
209 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
 194 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
210 
 
 195 
 
211 
# Autorisation des connexions légitimes à DansGuardian
196 
# Autorisation des connexions légitimes à DansGuardian
212 
# Allow connections for DansGuardian
 197 
# Allow connections for DansGuardian
213 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
 198 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
214 
 
 199 
 
215 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
 200 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
216 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
 201 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
217 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
 202 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
218 
 
 203 
 
219 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
 204 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
220 
# Allow connections for DNSMASQ (with blackhole)
 205 
# Allow connections for DNSMASQ (with blackhole)
221 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
 206 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
222 
 
 207 
 
223 
# Accès direct aux services internes
 208 
# Accès direct aux services internes
224 
# Internal services access
 209 
# Internal services access
225 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
 210 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
226 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
 211 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
227 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
 212 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
228 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport https -j ACCEPT	# Pages d'authentification et MCC # authentication pages and MCC
 213 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport https -j ACCEPT	# Pages d'authentification et MCC # authentication pages and MCC
229 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport http -j ACCEPT	# Page d'avertissement filtrage # Filtering warning pages
 214 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport http -j ACCEPT	# Page d'avertissement filtrage # Filtering warning pages
230 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 3990 -j ACCEPT	# Requêtes de deconnexion usagers # Users logout requests
 215 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 3990 -j ACCEPT	# Requêtes de deconnexion usagers # Users logout requests
231 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport ntp -j ACCEPT	# Serveur local de temps # local time server
 216 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport ntp -j ACCEPT	# Serveur local de temps # local time server
232 
 
 217 
 
233 
# SSHD rules if activate
218 
# SSHD rules if activate
234 
if [ $SSH = on ]
 219 
if [ $SSH = on ]
235 
	then
 220 
	then
236 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -m state --state NEW -j ULOG --ulog-nlgroup 2 --ulog-prefix "RULE ssh-from-LAN -- ACCEPT"
 221 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -m state --state NEW -j ULOG --ulog-nlgroup 2 --ulog-prefix "RULE ssh-from-LAN -- ACCEPT"
237 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
 222 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
238 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW --syn -j ULOG --ulog-nlgroup 2 --ulog-prefix "RULE ssh-from-WAN -- ACCEPT"
 223 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW --syn -j ULOG --ulog-nlgroup 2 --ulog-prefix "RULE ssh-from-WAN -- ACCEPT"
239 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
 224 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
240 
fi
 225 
fi
241 
 
 226 
 
242 
# Insertion de règles locales
 227 
# Insertion de règles locales
243 
# Here, we add local rules (i.e. VPN from Internet)
 228 
# Here, we add local rules (i.e. VPN from Internet)
244 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
 229 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
245 
        . /usr/local/etc/alcasar-iptables-local.sh
 230 
        . /usr/local/etc/alcasar-iptables-local.sh
246 
fi
 231 
fi
247 
 
 232 
 
248 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
 233 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
249 
# Deny and log on INPUT from the LAN
 234 
# Deny and log on INPUT from the LAN
250 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
 235 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
251 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 236 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
252 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
 237 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
253 
 
 238 
 
254 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
 239 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
255 
# Reject INTIF access (only when chilli is down)
 240 
# Reject INTIF access (only when chilli is down)
256 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
 241 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
257 
$IPTABLES -A INPUT -i $INTIF -j REJECT
 242 
$IPTABLES -A INPUT -i $INTIF -j REJECT
258 
 
 243 
 
259 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
 244 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
260 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
 245 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
261 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
 246 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
262 
 
 247 
 
263 
 
 248 
 
264 
#############################
 249 
#############################
265 
#        FORWARD            #
 250 
#        FORWARD            #
266 
#############################
 251 
#############################
267 
 
 252 
 
268 
# Rejet des requêtes DNS vers Internet
 253 
# Rejet des requêtes DNS vers Internet
269 
# Deny forward DNS
 254 
# Deny forward DNS
270 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
 255 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
271 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
 256 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
272 
 
 257 
 
273 
# Blocage des IPs du SET alcasar_ip_blocked
 - 
 
274 
# Deny IPs of the SET alcasar_ip_blocked
258 
if [ $DNS_FILTERING = on ]; then
275 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p icmp -j REJECT --reject-with icmp-port-unreachable
 - 
 
276 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
 - 
 
277 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset
 - 
 
278 
 
 - 
 
279 
# Blocage des IPs du SET blacklist_ip_blocked
 259 
	# Blocage des IPs du SET blacklist_ip_blocked
280 
# Deny IPs of the SET blacklist_ip_blocked
260 
	# Deny IPs of the SET blacklist_ip_blocked
281 
if [ $DNS_FILTERING = on ]; then
 - 
 
282 
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked -p icmp -j REJECT --reject-with icmp-port-unreachable
 261 
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked -p icmp -j REJECT --reject-with icmp-port-unreachable
283 
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
 262 
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
284 
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked -p tcp -j REJECT --reject-with tcp-reset
 263 
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked -p tcp -j REJECT --reject-with tcp-reset
285 
fi
 264 
fi
286 
 
 265 
 
287 
# Autorisation des retours de connexions légitimes
 266 
# Autorisation des retours de connexions légitimes
288 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
 267 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
289 
 
 268 
 
290 
#  If protocols filter is activate
269 
#  If protocols filter is activate
291 
if [ $PROTOCOLS_FILTERING = on ]; then
 270 
if [ $PROTOCOLS_FILTERING = on ]; then
292 
	# Compute exception IP (IP addresses that shouldn't be filtered)
 271 
	# Compute exception IP (IP addresses that shouldn't be filtered)
293 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
 272 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
294 
	if [ $nb_exceptions != "0" ]
 273 
	if [ $nb_exceptions != "0" ]
295 
	then
 274 
	then
296 
		while read ip_exception
275 
		while read ip_exception
297 
		do
 276 
		do
298 
#			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
 277 
#			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
299 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j NETFLOW
 278 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j NETFLOW
300 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
 279 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
301 
		done < /usr/local/etc/alcasar-filter-exceptions
 280 
		done < /usr/local/etc/alcasar-filter-exceptions
302 
	fi
 281 
	fi
303 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
282 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
304 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
 283 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
305 
	if [ $nb_uamallowed != "0" ]
 284 
	if [ $nb_uamallowed != "0" ]
306 
	then
 285 
	then
307 
		while read ip_allowed_line
286 
		while read ip_allowed_line
308 
		do
 287 
		do
309 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
 288 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
310 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
 289 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
311 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
 290 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
312 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
 291 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
313 
		done < /usr/local/etc/alcasar-uamallowed
 292 
		done < /usr/local/etc/alcasar-uamallowed
314 
	fi
 293 
	fi
315 
	# Autorisation des protocoles non commentés
 294 
	# Autorisation des protocoles non commentés
316 
	# Allow non comment protocols
 295 
	# Allow non comment protocols
317 
	while read svc_line
 296 
	while read svc_line
318 
	do
 297 
	do
319 
		svc_on=`echo $svc_line|cut -b1`
 298 
		svc_on=`echo $svc_line|cut -b1`
320 
		if [ $svc_on != "#" ]
 299 
		if [ $svc_on != "#" ]
321 
		then
300 
		then
322 
			svc_name=`echo $svc_line|cut -d" " -f1`
 301 
			svc_name=`echo $svc_line|cut -d" " -f1`
323 
			svc_port=`echo $svc_line|cut -d" " -f2`
 302 
			svc_port=`echo $svc_line|cut -d" " -f2`
324 
			if [ $svc_name = "icmp" ]
 303 
			if [ $svc_name = "icmp" ]
325 
			then
 304 
			then
326 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
 305 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
327 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
306 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
328 
			else
 307 
			else
329 
 
 308 
 
330 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_TCP-$svc_name -- ACCEPT "
 309 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_TCP-$svc_name -- ACCEPT "
331 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
 310 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
332 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
 311 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
333 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_UDP-$svc_name -- ACCEPT "
 312 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_UDP-$svc_name -- ACCEPT "
334 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
 313 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
335 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
 314 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
336 
			fi
 315 
			fi
337 
		fi
 316 
		fi
338 
	done < /usr/local/etc/alcasar-services
 317 
	done < /usr/local/etc/alcasar-services
339 
	# Rejet explicite des autres protocoles
 318 
	# Rejet explicite des autres protocoles
340 
	# reject the others protocols
 319 
	# reject the others protocols
341 
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
 320 
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
342 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 321 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
343 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
 322 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
344 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
323 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
345 
fi
 324 
fi
346 
 
 325 
 
347 
#  If QOS is activate  #
 326 
#  If QOS is activate  #
348 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
 327 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
349 
	. /usr/local/etc/alcasar-iptables-qos.sh
328 
	. /usr/local/etc/alcasar-iptables-qos.sh
350 
fi
 329 
fi
351 
 
 330 
 
352 
# Autorisation des connections sortant du LAN
331 
# Autorisation des connections sortant du LAN
353 
# Allow forward connections with log
 332 
# Allow forward connections with log
354 
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
 333 
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
355 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
 334 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
356 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
 335 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
357 
 
 336 
 
358 
#############################
 337 
#############################
359 
#         OUTPUT            #
 338 
#         OUTPUT            #
360 
#############################
 339 
#############################
361 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
 340 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
362 
# Everything is allowed but traffic through outside network interface
 341 
# Everything is allowed but traffic through outside network interface
363 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
 342 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
364 
 
 343 
 
365 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
344 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
366 
# Allow DNS requests to identified DNS servers
 345 
# Allow DNS requests to identified DNS servers
367 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
 346 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
368 
 
 347 
 
369 
# On autorise les requêtes HTTP sortantes
 348 
# On autorise les requêtes HTTP sortantes
370 
# HTTP requests are allowed
 349 
# HTTP requests are allowed
371 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
 350 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
372 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
 351 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
373 
 
 352 
 
374 
# On autorise les requêtes FTP
353 
# On autorise les requêtes FTP
375 
# FTP requests are allowed
 354 
# FTP requests are allowed
376 
modprobe ip_conntrack_ftp
 355 
modprobe ip_conntrack_ftp
377 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
 356 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
378 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
 357 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
379 
 
 358 
 
380 
# On autorise les requêtes NTP
359 
# On autorise les requêtes NTP
381 
# NTP requests are allowed
 360 
# NTP requests are allowed
382 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
 361 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
383 
 
 362 
 
384 
# On autorise les requêtes ICMP (ping)
363 
# On autorise les requêtes ICMP (ping)
385 
# ICMP (ping) requests are allowed
 364 
# ICMP (ping) requests are allowed
386 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
 365 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
387 
 
 366 
 
388 
# On autorise les requêtes LDAP si un serveur externe est configué
 367 
# On autorise les requêtes LDAP si un serveur externe est configué
389 
# LDAP requests are allowed if an external server is declared
 368 
# LDAP requests are allowed if an external server is declared
390 
if [ $LDAP = on ]
 369 
if [ $LDAP = on ]
391 
	then
 370 
	then
392 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
 371 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
393 
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
 372 
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
394 
fi
 373 
fi
395 
 
 374 
 
396 
 
 375 
 
397 
#############################
 376 
#############################
398 
#       POSTROUTING         #
 377 
#       POSTROUTING         #
399 
#############################
 378 
#############################
400 
# Traduction dynamique d'adresse en sortie
 379 
# Traduction dynamique d'adresse en sortie
401 
# Dynamic NAT on EXTIF
 380 
# Dynamic NAT on EXTIF
402 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
 381 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
403 
 
 382 
 
404 
# Save all rules
 383 
# Save all rules
405 
/etc/init.d/iptables save
 384 
/etc/init.d/iptables save
406 
 
 385 
 
407 
# End of script
 386 
# End of script
408 
 
 387 
 
409 
 
 388