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#!/bin/bash
 1 
#!/bin/bash
2 
# $Id: alcasar-iptables.sh 1291 2014-01-10 17:49:15Z richard $
 2 
# $Id: alcasar-iptables.sh 1294 2014-01-12 23:03:00Z 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 write 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 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 with the ulog group 2;
 11 
#	3 SSH on ALCASAR with the Ulog group 2;
12 
#	4 extern access attempts 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"				# categories files of the BlackListed IP
33 
QOS=`grep QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
 33 
QOS=`grep QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
34 
QOS=${QOS:=off}
 34 
QOS=${QOS:=off}
35 
SSH=`grep SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
 35 
SSH=`grep SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
36 
SSH=${SSH:=off}
 36 
SSH=${SSH:=off}
37 
SSH_ADMIN_FROM=`grep SSH_ADMIN_FROM= $conf_file|cut -d"=" -f2`
 37 
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)
 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 
LDAP=`grep LDAP= $conf_file|cut -d"=" -f2`				# LDAP external server active (on/off)
 39 
LDAP=`grep LDAP= $conf_file|cut -d"=" -f2`				# LDAP external server active (on/off)
40 
LDAP=${LDAP:=off}
 40 
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)
 41 
LDAP_IP=`grep LDAP_IP= $conf_file|cut -d"=" -f2`			# WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
42 
LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
 42 
LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
43 
EXTIF="eth0"
 43 
EXTIF="eth0"
44 
INTIF="eth1"
 44 
INTIF="eth1"
45 
TUNIF="tun0"								# listen device for chilli daemon
 45 
TUNIF="tun0"								# listen device for chilli daemon
46 
IPTABLES="/sbin/iptables"
 46 
IPTABLES="/sbin/iptables"
47 
 
 47 
 
48 
 
 48 
 
49 
# loading of NetFlow probe (ipt_NETFLOW kernel module)
 49 
# loading of NetFlow probe (ipt_NETFLOW kernel module)
50 
modprobe ipt_NETFLOW destination=127.0.0.1:2055
 50 
modprobe ipt_NETFLOW destination=127.0.0.1:2055
51 
 
 51 
 
52 
# Effacement des règles existantes
 52 
# Effacement des règles existantes
53 
# Flush all existing rules
 53 
# Flush all existing rules
54 
$IPTABLES -F
 54 
$IPTABLES -F
55 
$IPTABLES -t nat -F
 55 
$IPTABLES -t nat -F
56 
$IPTABLES -t mangle -F
 56 
$IPTABLES -t mangle -F
57 
$IPTABLES -F INPUT
 57 
$IPTABLES -F INPUT
58 
$IPTABLES -F FORWARD
 58 
$IPTABLES -F FORWARD
59 
$IPTABLES -F OUTPUT
 59 
$IPTABLES -F OUTPUT
60 
 
 60 
 
61 
# Suppression des chaines utilisateurs sur les tables filter et nat
 61 
# Suppression des chaines utilisateurs sur les tables filter et nat
62 
# Flush non default rules on filter and nat tables
 62 
# Flush non default rules on filter and nat tables
63 
$IPTABLES -X
 63 
$IPTABLES -X
64 
$IPTABLES -t nat -X
 64 
$IPTABLES -t nat -X
65 
 
 65 
 
66 
# Stratégies par défaut
 66 
# Stratégies par défaut
67 
# Default policies
 67 
# Default policies
68 
$IPTABLES -P INPUT DROP
 68 
$IPTABLES -P INPUT DROP
69 
$IPTABLES -P FORWARD DROP
 69 
$IPTABLES -P FORWARD DROP
70 
$IPTABLES -P OUTPUT DROP
 70 
$IPTABLES -P OUTPUT DROP
71 
$IPTABLES -t nat -P PREROUTING ACCEPT
 71 
$IPTABLES -t nat -P PREROUTING ACCEPT
72 
$IPTABLES -t nat -P POSTROUTING ACCEPT
 72 
$IPTABLES -t nat -P POSTROUTING ACCEPT
73 
$IPTABLES -t nat -P OUTPUT ACCEPT
 73 
$IPTABLES -t nat -P OUTPUT ACCEPT
74 
 
 74 
 
75 
# destruction de tous les SET
 75 
# destruction de tous les SET
76 
# destroy all the SET
 76 
# destroy all the SET
77 
ipset destroy
 77 
ipset destroy
78 
 
 78 
 
79 
# Création du SET alcasar_ip_blocked et premier peuplement
 79 
# Création et peuplement du SET alcasar_ip_blocked
80 
# creation of alcasar_ip_blocked SET and first populating
 80 
# creation and first populating of alcasar_ip_blocked SET
81 
ipset create alcasar_ip_blocked hash:net hashsize 1024
 81 
ipset create alcasar_ip_blocked hash:net hashsize 1024
82 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
82 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
83 
	while read ip_line
 83 
	while read ip_line
84 
	do
 84 
	do
85 
		ip_on=`echo $ip_line|cut -b1`
 85 
		ip_on=`echo $ip_line|cut -b1`
86 
		if [ $ip_on != "#" ]
 86 
		if [ $ip_on != "#" ]
87 
		then
87 
		then
88 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
 88 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
89 
			echo $ip_blocked
 - 
 
90 
			ipset add alcasar_ip_blocked $ip_blocked
 89 
			ipset add alcasar_ip_blocked $ip_blocked
91 
		fi
 90 
		fi
92 
	done < /usr/local/etc/alcasar-ip-blocked
 91 
	done < /usr/local/etc/alcasar-ip-blocked
93 
fi
 92 
fi
94 
 
 93 
 
- 
 
 94 
# 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)
- 
 
 96 
ipset create authenticated_ip hash:net hashsize 1024
- 
 
 97 
OLDIFS=$IFS
- 
 
 98 
IFS=$'\n'
- 
 
 99 
for equipment in `/usr/sbin/chilli_query list |grep -v "\.0\.0\.0"`
- 
 
 100 
do
- 
 
 101 
	active_ip=`echo $equipment |cut -d" " -f2`
- 
 
 102 
	active_session=`echo $equipment |cut -d" " -f5`
- 
 
 103 
	if [[ $(expr $active_session) -eq 1 ]]
- 
 
 104 
	then
- 
 
 105 
		ipset add authenticated_ip $active_ip
- 
 
 106 
	fi
- 
 
 107 
done
- 
 
 108 
IFS=$OLDIFS
- 
 
 109 
 
- 
 
 110 
# Création et peuplement du SET blacklist_ip_blocked
- 
 
 111 
# creation and first populating of blacklist_ip_blocked SET
- 
 
 112 
# wait for a better blacklist adapt process
- 
 
 113 
#ipset create blacklist_ip_blocked hash:net hashsize 1024
- 
 
 114 
#cd $BL_IP_CAT
- 
 
 115 
#for category in `ls -1 | cut -d"@" -f1`
- 
 
 116 
#do
- 
 
 117 
#	while read ip_blocked
- 
 
 118 
#	do
- 
 
 119 
#		ipset add blacklist_ip_blocked $ip_blocked
- 
 
 120 
#	done < $BL_IP_CAT/$category
- 
 
 121 
#done
- 
 
 122 
 
95 
#############################
 123 
#############################
96 
#       PREROUTING          #
 124 
#       PREROUTING          #
97 
#############################
 125 
#############################
98 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
 126 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
99 
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
 127 
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
100 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j ULOG --ulog-prefix "RULE direct-proxy -- DENY "
 128 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j ULOG --ulog-prefix "RULE direct-proxy -- DENY "
101 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
 129 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
102 
 
 130 
 
103 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
 131 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
104 
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
 132 
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
105 
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
 133 
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
106 
# Remark : this port is only open when filtering is on
 134 
# Remark : this port is only open when filtering is on
107 
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "
 135 
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "
108 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
 136 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
109 
 
 137 
 
110 
# Si le filtrage DNS est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
138 
# Si le filtrage DNS est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
111 
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
 139 
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
112 
if [ $DNS_FILTERING = on ]; then
 140 
if [ $DNS_FILTERING = on ]; then
113 
	# Compute exception IP
 141 
	# Compute exception IP
114 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
 142 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
115 
	if [ $nb_exceptions != "0" ]
 143 
	if [ $nb_exceptions != "0" ]
116 
	then
 144 
	then
117 
		while read ip_exception
145 
		while read ip_exception
118 
		do
 146 
		do
119 
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
 147 
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
120 
		done < /usr/local/etc/alcasar-filter-exceptions
 148 
		done < /usr/local/etc/alcasar-filter-exceptions
121 
	fi
 149 
	fi
122 
		$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
 150 
		$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
123 
fi
 151 
fi
124 
# Redirection des requêtes HTTP des IP bloquées vers ALCASAR (page 'accès interdit')
 152 
# Redirection des requêtes HTTP des IP admin bannies vers ALCASAR (page 'accès interdit')
125 
# Redirect HTTP requests of banned ip to ALCASAR (access deny window)
 153 
# Redirect HTTP requests of admin banned ip to ALCASAR (access deny window)
126 
$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 80
 154 
$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
- 
 
 155 
 
- 
 
 156 
# Redirection des requêtes HTTP des IP de la blacklist vers ALCASAR (page 'accès interdit')
- 
 
 157 
# Redirect HTTP requests of blacklist ip to ALCASAR (access deny window)
- 
 
 158 
#if [ $DNS_FILTERING = on ]; then
- 
 
 159 
#$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
- 
 
 160 
#fi
- 
 
 161 
 
- 
 
 162 
# Redirection des requêtes HTTPS des IP sans utilisateurs authentifiés vers ALCASAR (page d'interception)
- 
 
 163 
# Redirect HTTPS requests of IP that don't have authenticate user to ALCASAR (intercept page)
- 
 
 164 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -m set ! --match-set authenticated_ip src ! -d $PRIVATE_IP -p tcp --dport https -j REDIRECT --to-port https
127 
 
 165 
 
128 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
 166 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
129 
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
 167 
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
130 
$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 "
 168 
$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 "
131 
 
 169 
 
132 
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent)
 170 
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent)
133 
# Redirect outbound HTTP requests to DansGuardian (transparent proxy)
 171 
# Redirect outbound HTTP requests to DansGuardian (transparent proxy)
134 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
 172 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
135 
 
 173 
 
136 
# Redirection des requêtes NTP vers le serveur NTP local
 174 
# Redirection des requêtes NTP vers le serveur NTP local
137 
# Redirect NTP request in local NTP server
 175 
# Redirect NTP request in local NTP server
138 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
 176 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
139 
 
 177 
 
140 
#############################
 178 
#############################
141 
#         INPUT             #
 179 
#         INPUT             #
142 
#############################
 180 
#############################
143 
 
 181 
 
144 
# Tout passe sur loopback
 182 
# Tout passe sur loopback
145 
# accept all on loopback
 183 
# accept all on loopback
146 
$IPTABLES -A INPUT -i lo -j ACCEPT
 184 
$IPTABLES -A INPUT -i lo -j ACCEPT
147 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
 185 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
148 
 
 186 
 
149 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
 187 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
150 
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
 188 
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
151 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
 189 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
152 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
 190 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
153 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
 191 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
154 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
 192 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
155 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
 193 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
156 
 
 194 
 
157 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
 195 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
158 
# Drop broadcast & multicast on EXTIF to avoid log
196 
# Drop broadcast & multicast on EXTIF to avoid log
159 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
 197 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
160 
 
 198 
 
161 
# On autorise les retours de connexions légitimes par INPUT
 199 
# On autorise les retours de connexions légitimes par INPUT
162 
# Conntrack on INPUT
 200 
# Conntrack on INPUT
163 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
 201 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
164 
 
 202 
 
165 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
 203 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
166 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
 204 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
167 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
 205 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
168 
 
 206 
 
169 
# Autorisation des connexions légitimes à DansGuardian
207 
# Autorisation des connexions légitimes à DansGuardian
170 
# Allow connections for DansGuardian
 208 
# Allow connections for DansGuardian
171 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
 209 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
172 
 
 210 
 
173 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
 211 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
174 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
 212 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
175 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
 213 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
176 
 
 214 
 
177 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
 215 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
178 
# Allow connections for DNSMASQ (with blackhole)
 216 
# Allow connections for DNSMASQ (with blackhole)
179 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
 217 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
180 
 
 218 
 
181 
# Accès direct aux services internes
 219 
# Accès direct aux services internes
182 
# Internal services access
 220 
# Internal services access
183 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
 221 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
184 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
 222 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
185 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
 223 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
186 
$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
 224 
$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
187 
$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
 225 
$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
188 
$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
 226 
$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
189 
$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
 227 
$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
190 
 
 228 
 
191 
# SSHD rules if activate
229 
# SSHD rules if activate
192 
if [ $SSH = on ]
 230 
if [ $SSH = on ]
193 
	then
 231 
	then
194 
	$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"
 232 
	$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"
195 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
 233 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
196 
	$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"
 234 
	$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"
197 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
 235 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
198 
fi
 236 
fi
199 
 
 237 
 
200 
# Insertion de règles locales
 238 
# Insertion de règles locales
201 
# Here, we add local rules (i.e. VPN from Internet)
 239 
# Here, we add local rules (i.e. VPN from Internet)
202 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
 240 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
203 
        . /usr/local/etc/alcasar-iptables-local.sh
 241 
        . /usr/local/etc/alcasar-iptables-local.sh
204 
fi
 242 
fi
205 
 
 243 
 
206 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
 244 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
207 
# Deny and log on INPUT from the LAN
 245 
# Deny and log on INPUT from the LAN
208 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
 246 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
209 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 247 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
210 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
 248 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
211 
 
 249 
 
212 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
 250 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
213 
# Reject INTIF access (only when chilli is down)
 251 
# Reject INTIF access (only when chilli is down)
214 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
 252 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
215 
$IPTABLES -A INPUT -i $INTIF -j REJECT
 253 
$IPTABLES -A INPUT -i $INTIF -j REJECT
216 
 
 254 
 
217 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
 255 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
218 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
 256 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
219 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
 257 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
220 
 
 258 
 
221 
 
 259 
 
222 
#############################
 260 
#############################
223 
#        FORWARD            #
 261 
#        FORWARD            #
224 
#############################
 262 
#############################
225 
 
 263 
 
226 
# Rejet des requêtes DNS vers Internet
 264 
# Rejet des requêtes DNS vers Internet
227 
# Deny forward DNS
 265 
# Deny forward DNS
228 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
 266 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
229 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
 267 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
230 
 
 268 
 
231 
# Blocage des IPs du SET alcasar_ip_blocked
 269 
# Blocage des IPs du SET alcasar_ip_blocked
232 
# Deny IPs of the SET alcasar_ip_blocked
270 
# Deny IPs of the SET alcasar_ip_blocked
233 
$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 80
 - 
 
234 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
 - 
 
235 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p icmp -j REJECT --reject-with icmp-port-unreachable
 271 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p icmp -j REJECT --reject-with icmp-port-unreachable
- 
 
 272 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
236 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset
 273 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset
237 
 
 274 
 
238 
# Si le filtrage de domain est activé, blocage des IP de la BL
275 
# Blocage des IPs du SET blacklist_ip_blocked
239 
# If DNS filter is on, reject IP of BL
 276 
# Deny IPs of the SET blacklist_ip_blocked
240 
# Comment : loading time is too long and iptables should become oveloaded !!! should use "ipset" instead
 - 
 
241 
#if [ $DNS_FILTERING = on ]; then
 277 
#if [ $DNS_FILTERING = on ]; then
242 
#	cd $BL_IP_CAT
 - 
 
243 
#	for category in `ls -1 | cut -d"@" -f1`
 - 
 
244 
#	do
 - 
 
245 
#		while read ip_blocked
 - 
 
246 
#		do
 - 
 
247 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
 - 
 
248 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p udp -j REJECT --reject-with icmp-port-unreachable
 278 
#	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked -p icmp -j REJECT --reject-with icmp-port-unreachable
249 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p icmp -j REJECT --reject-with icmp-port-unreachable
 279 
#	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
250 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
 280 
#	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked -p tcp -j REJECT --reject-with tcp-reset
251 
#		done < $BL_IP_CAT/$category
 - 
 
252 
#	done
 - 
 
253 
#fi
 281 
#fi
254 
 
 282 
 
255 
# Autorisation des retours de connexions légitimes
 283 
# Autorisation des retours de connexions légitimes
256 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
 284 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
257 
 
 285 
 
258 
#  If protocols filter is activate
286 
#  If protocols filter is activate
259 
if [ $PROTOCOLS_FILTERING = on ]; then
 287 
if [ $PROTOCOLS_FILTERING = on ]; then
260 
	# Compute exception IP (IP addresses that shouldn't be filtered)
 288 
	# Compute exception IP (IP addresses that shouldn't be filtered)
261 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
 289 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
262 
	if [ $nb_exceptions != "0" ]
 290 
	if [ $nb_exceptions != "0" ]
263 
	then
 291 
	then
264 
		while read ip_exception
292 
		while read ip_exception
265 
		do
 293 
		do
266 
#			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
 294 
#			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
267 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j NETFLOW
 295 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j NETFLOW
268 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
 296 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
269 
		done < /usr/local/etc/alcasar-filter-exceptions
 297 
		done < /usr/local/etc/alcasar-filter-exceptions
270 
	fi
 298 
	fi
271 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
299 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
272 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
 300 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
273 
	if [ $nb_uamallowed != "0" ]
 301 
	if [ $nb_uamallowed != "0" ]
274 
	then
 302 
	then
275 
		while read ip_allowed_line
303 
		while read ip_allowed_line
276 
		do
 304 
		do
277 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
 305 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
278 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
 306 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
279 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
 307 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
280 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
 308 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
281 
		done < /usr/local/etc/alcasar-uamallowed
 309 
		done < /usr/local/etc/alcasar-uamallowed
282 
	fi
 310 
	fi
283 
	# Autorisation des protocoles non commentés
 311 
	# Autorisation des protocoles non commentés
284 
	# Allow non comment protocols
 312 
	# Allow non comment protocols
285 
	while read svc_line
 313 
	while read svc_line
286 
	do
 314 
	do
287 
		svc_on=`echo $svc_line|cut -b1`
 315 
		svc_on=`echo $svc_line|cut -b1`
288 
		if [ $svc_on != "#" ]
 316 
		if [ $svc_on != "#" ]
289 
		then
317 
		then
290 
			svc_name=`echo $svc_line|cut -d" " -f1`
 318 
			svc_name=`echo $svc_line|cut -d" " -f1`
291 
			svc_port=`echo $svc_line|cut -d" " -f2`
 319 
			svc_port=`echo $svc_line|cut -d" " -f2`
292 
			if [ $svc_name = "icmp" ]
 320 
			if [ $svc_name = "icmp" ]
293 
			then
 321 
			then
294 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
 322 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
295 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
323 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
296 
			else
 324 
			else
297 
 
 325 
 
298 
#				$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 "
 326 
#				$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 "
299 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
 327 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
300 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
 328 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
301 
#				$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 "
 329 
#				$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 "
302 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
 330 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
303 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
 331 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
304 
			fi
 332 
			fi
305 
		fi
 333 
		fi
306 
	done < /usr/local/etc/alcasar-services
 334 
	done < /usr/local/etc/alcasar-services
307 
	# Rejet explicite des autres protocoles
 335 
	# Rejet explicite des autres protocoles
308 
	# reject the others protocols
 336 
	# reject the others protocols
309 
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
 337 
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
310 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 338 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
311 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
 339 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
312 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
340 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
313 
fi
 341 
fi
314 
 
 342 
 
315 
#  If QOS is activate  #
 343 
#  If QOS is activate  #
316 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
 344 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
317 
	. /usr/local/etc/alcasar-iptables-qos.sh
345 
	. /usr/local/etc/alcasar-iptables-qos.sh
318 
fi
 346 
fi
319 
 
 347 
 
320 
# Autorisation des connections sortant du LAN
348 
# Autorisation des connections sortant du LAN
321 
# Allow forward connections with log
 349 
# Allow forward connections with log
322 
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
 350 
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
323 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
 351 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
324 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
 352 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
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 353 
 
326 
#############################
 354 
#############################
327 
#         OUTPUT            #
 355 
#         OUTPUT            #
328 
#############################
 356 
#############################
329 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
 357 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
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# Everything is allowed but traffic through outside network interface
 358 
# Everything is allowed but traffic through outside network interface
331 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
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$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
332 
 
 360 
 
333 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
361 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
334 
# Allow DNS requests to identified DNS servers
 362 
# Allow DNS requests to identified DNS servers
335 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
 363 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
336 
 
 364 
 
337 
# On autorise les requêtes HTTP sortantes
 365 
# On autorise les requêtes HTTP sortantes
338 
# HTTP requests are allowed
 366 
# HTTP requests are allowed
339 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
 367 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
340 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
 368 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
341 
 
 369 
 
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# On autorise les requêtes FTP
370 
# On autorise les requêtes FTP
343 
# FTP requests are allowed
 371 
# FTP requests are allowed
344 
modprobe ip_conntrack_ftp
 372 
modprobe ip_conntrack_ftp
345 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
 373 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
346 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
 374 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
347 
 
 375 
 
348 
# On autorise les requêtes NTP
376 
# On autorise les requêtes NTP
349 
# NTP requests are allowed
 377 
# NTP requests are allowed
350 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
 378 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
351 
 
 379 
 
352 
# On autorise les requêtes ICMP (ping)
380 
# On autorise les requêtes ICMP (ping)
353 
# ICMP (ping) requests are allowed
 381 
# ICMP (ping) requests are allowed
354 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
 382 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
355 
 
 383 
 
356 
# On autorise les requêtes LDAP si un serveur externe est configué
 384 
# On autorise les requêtes LDAP si un serveur externe est configué
357 
# LDAP requests are allowed if an external server is declared
 385 
# LDAP requests are allowed if an external server is declared
358 
if [ $LDAP = on ]
 386 
if [ $LDAP = on ]
359 
	then
 387 
	then
360 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
 388 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
361 
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
 389 
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
362 
fi
 390 
fi
363 
 
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364 
 
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365 
#############################
 393 
#############################
366 
#       POSTROUTING         #
 394 
#       POSTROUTING         #
367 
#############################
 395 
#############################
368 
# Traduction dynamique d'adresse en sortie
 396 
# Traduction dynamique d'adresse en sortie
369 
# Dynamic NAT on EXTIF
 397 
# Dynamic NAT on EXTIF
370 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
 398 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
371 
 
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372 
# Save all rules
 400 
# Save all rules
373 
/etc/init.d/iptables save
 401 
/etc/init.d/iptables save
374 
 
 402 
 
375 
# End of script
 403 
# End of script
376 
 
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377 
 
 405