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#!/bin/bash
 1 
#!/bin/bash
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# $Id: alcasar-iptables.sh 1294 2014-01-12 23:03:00Z richard $
 2 
# $Id: alcasar-iptables.sh 1299 2014-01-13 22:26:55Z 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 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"				# 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 et peuplement du SET alcasar_ip_blocked
 79 
# Création et peuplement du SET alcasar_ip_blocked
80 
# creation and first populating of alcasar_ip_blocked SET
 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 
			ipset add alcasar_ip_blocked $ip_blocked
 89 
			ipset add alcasar_ip_blocked $ip_blocked
90 
		fi
 90 
		fi
91 
	done < /usr/local/etc/alcasar-ip-blocked
 91 
	done < /usr/local/etc/alcasar-ip-blocked
92 
fi
 92 
fi
93 
 
 93 
 
94 
# Création et initialisation du SET authenticated_ip (dynamiquement peuplé par les scripts conup/condown)
 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)
 95 
# creation and initialization of authenticated_ip_ SET (populated dynamicly by conup/condown scripts)
96 
ipset create authenticated_ip hash:net hashsize 1024
 96 
ipset create authenticated_ip hash:net hashsize 1024
97 
OLDIFS=$IFS
 97 
OLDIFS=$IFS
98 
IFS=$'\n'
 98 
IFS=$'\n'
99 
for equipment in `/usr/sbin/chilli_query list |grep -v "\.0\.0\.0"`
 99 
for equipment in `/usr/sbin/chilli_query list |grep -v "\.0\.0\.0"`
100 
do
 100 
do
101 
	active_ip=`echo $equipment |cut -d" " -f2`
 101 
	active_ip=`echo $equipment |cut -d" " -f2`
102 
	active_session=`echo $equipment |cut -d" " -f5`
 102 
	active_session=`echo $equipment |cut -d" " -f5`
103 
	if [[ $(expr $active_session) -eq 1 ]]
 103 
	if [[ $(expr $active_session) -eq 1 ]]
104 
	then
 104 
	then
105 
		ipset add authenticated_ip $active_ip
 105 
		ipset add authenticated_ip $active_ip
106 
	fi
 106 
	fi
107 
done
 107 
done
108 
IFS=$OLDIFS
 108 
IFS=$OLDIFS
109 
 
 109 
 
110 
# Création et peuplement du SET blacklist_ip_blocked
 110 
# Création et peuplement du SET blacklist_ip_blocked
111 
# creation and first populating of blacklist_ip_blocked SET
 111 
# creation and first populating of blacklist_ip_blocked SET
112 
# wait for a better blacklist adapt process
112 
# It take a lot of time (try to do this during the blacklist import process)
113 
#ipset create blacklist_ip_blocked hash:net hashsize 1024
 113 
#ipset create blacklist_ip_blocked hash:net hashsize 1024
114 
#cd $BL_IP_CAT
 114 
#cd $BL_IP_CAT
115 
#for category in `ls -1 | cut -d"@" -f1`
 115 
#for category in `ls -1 | cut -d"@" -f1`
116 
#do
 116 
#do
117 
#	while read ip_blocked
 117 
#	while read ip_blocked
118 
#	do
 118 
#	do
119 
#		ipset add blacklist_ip_blocked $ip_blocked
 119 
#		ipset add blacklist_ip_blocked $ip_blocked
120 
#	done < $BL_IP_CAT/$category
 120 
#	done < $BL_IP_CAT/$category
121 
#done
 121 
#done
122 
 
 122 
 
123 
#############################
 123 
#############################
124 
#       PREROUTING          #
 124 
#       PREROUTING          #
125 
#############################
 125 
#############################
126 
# 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
127 
# 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
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 "
 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 "
129 
$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
130 
 
 130 
 
131 
# 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
132 
# 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
133 
# 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
134 
# Remark : this port is only open when filtering is on
 134 
# Remark : this port is only open when filtering is on
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 "
 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 "
136 
$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
137 
 
 137 
 
138 
# 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
139 
# 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
140 
if [ $DNS_FILTERING = on ]; then
 140 
if [ $DNS_FILTERING = on ]; then
141 
	# Compute exception IP
 141 
	# Compute exception IP
142 
	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`
143 
	if [ $nb_exceptions != "0" ]
 143 
	if [ $nb_exceptions != "0" ]
144 
	then
 144 
	then
145 
		while read ip_exception
145 
		while read ip_exception
146 
		do
 146 
		do
147 
			$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
148 
		done < /usr/local/etc/alcasar-filter-exceptions
 148 
		done < /usr/local/etc/alcasar-filter-exceptions
149 
	fi
 149 
	fi
150 
		$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
151 
fi
 151 
fi
152 
# Redirection des requêtes HTTP des IP admin bannies vers ALCASAR (page 'accès interdit')
 152 
# Redirection des requêtes HTTP des IP admin bannies vers ALCASAR (page 'accès interdit')
153 
# Redirect HTTP requests of admin banned ip to ALCASAR (access deny window)
 153 
# Redirect HTTP requests of admin banned ip to ALCASAR (access deny window)
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
 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 
 
 155 
 
156 
# Redirection des requêtes HTTP des IP de la blacklist vers ALCASAR (page 'accès interdit')
 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)
 157 
# Redirect HTTP requests of blacklist ip to ALCASAR (access deny window)
158 
#if [ $DNS_FILTERING = on ]; then
 158 
#if [ $DNS_FILTERING = on ]; then
159 
#$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -m set --match-set blacklist_ip_blocked dst -p tcp --dport http -j REDIRECT --to-port 80
 159 
#$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
 160 
#fi
161 
 
 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
 - 
 
165 
 
 - 
 
166 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
 162 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
167 
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
 163 
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
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 "
 164 
$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 "
169 
 
 165 
 
170 
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent)
 166 
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent)
171 
# Redirect outbound HTTP requests to DansGuardian (transparent proxy)
 167 
# Redirect outbound HTTP requests to DansGuardian (transparent proxy)
172 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
 168 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
173 
 
 169 
 
174 
# Redirection des requêtes NTP vers le serveur NTP local
 170 
# Redirection des requêtes NTP vers le serveur NTP local
175 
# Redirect NTP request in local NTP server
 171 
# Redirect NTP request in local NTP server
176 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
 172 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
177 
 
 173 
 
178 
#############################
 174 
#############################
179 
#         INPUT             #
 175 
#         INPUT             #
180 
#############################
 176 
#############################
181 
 
 177 
 
182 
# Tout passe sur loopback
 178 
# Tout passe sur loopback
183 
# accept all on loopback
 179 
# accept all on loopback
184 
$IPTABLES -A INPUT -i lo -j ACCEPT
 180 
$IPTABLES -A INPUT -i lo -j ACCEPT
185 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
 181 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
186 
 
 182 
 
187 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
 183 
# Rejet des demandes de connexions non conformes (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)
 184 
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
189 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
 185 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
190 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
 186 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
191 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
 187 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
192 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
 188 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
193 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
 189 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
194 
 
 190 
 
195 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
 191 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
196 
# Drop broadcast & multicast on EXTIF to avoid log
192 
# Drop broadcast & multicast on EXTIF to avoid log
197 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
 193 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
198 
 
 194 
 
199 
# On autorise les retours de connexions légitimes par INPUT
 195 
# On autorise les retours de connexions légitimes par INPUT
200 
# Conntrack on INPUT
 196 
# Conntrack on INPUT
201 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
 197 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
202 
 
 198 
 
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)
 199 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
204 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
 200 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
205 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
 201 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
206 
 
 202 
 
207 
# Autorisation des connexions légitimes à DansGuardian
203 
# Autorisation des connexions légitimes à DansGuardian
208 
# Allow connections for DansGuardian
 204 
# Allow connections for DansGuardian
209 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
 205 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
210 
 
 206 
 
211 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
 207 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
212 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
 208 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
213 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
 209 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
214 
 
 210 
 
215 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
 211 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
216 
# Allow connections for DNSMASQ (with blackhole)
 212 
# Allow connections for DNSMASQ (with blackhole)
217 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
 213 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
218 
 
 214 
 
219 
# Accès direct aux services internes
 215 
# Accès direct aux services internes
220 
# Internal services access
 216 
# Internal services access
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
 217 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
222 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
 218 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
223 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
 219 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
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
 220 
$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
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
 221 
$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
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
 222 
$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
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
 223 
$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
228 
 
 224 
 
229 
# SSHD rules if activate
225 
# SSHD rules if activate
230 
if [ $SSH = on ]
 226 
if [ $SSH = on ]
231 
	then
 227 
	then
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"
 228 
	$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"
233 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
 229 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j 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"
 230 
	$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"
235 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
 231 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
236 
fi
 232 
fi
237 
 
 233 
 
238 
# Insertion de règles locales
 234 
# Insertion de règles locales
239 
# Here, we add local rules (i.e. VPN from Internet)
 235 
# Here, we add local rules (i.e. VPN from Internet)
240 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
 236 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
241 
        . /usr/local/etc/alcasar-iptables-local.sh
 237 
        . /usr/local/etc/alcasar-iptables-local.sh
242 
fi
 238 
fi
243 
 
 239 
 
244 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
 240 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
245 
# Deny and log on INPUT from the LAN
 241 
# Deny and log on INPUT from the LAN
246 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
 242 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
247 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 243 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
248 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
 244 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
249 
 
 245 
 
250 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
 246 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
251 
# Reject INTIF access (only when chilli is down)
 247 
# Reject INTIF access (only when chilli is down)
252 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
 248 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
253 
$IPTABLES -A INPUT -i $INTIF -j REJECT
 249 
$IPTABLES -A INPUT -i $INTIF -j REJECT
254 
 
 250 
 
255 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
 251 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
256 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
 252 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
257 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
 253 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
258 
 
 254 
 
259 
 
 255 
 
260 
#############################
 256 
#############################
261 
#        FORWARD            #
 257 
#        FORWARD            #
262 
#############################
 258 
#############################
263 
 
 259 
 
264 
# Rejet des requêtes DNS vers Internet
 260 
# Rejet des requêtes DNS vers Internet
265 
# Deny forward DNS
 261 
# Deny forward DNS
266 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
 262 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
267 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
 263 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
268 
 
 264 
 
269 
# Blocage des IPs du SET alcasar_ip_blocked
 265 
# Blocage des IPs du SET alcasar_ip_blocked
270 
# Deny IPs of the SET alcasar_ip_blocked
266 
# Deny IPs of the SET alcasar_ip_blocked
271 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p icmp -j REJECT --reject-with icmp-port-unreachable
 267 
$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
 268 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
273 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset
 269 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset
274 
 
 270 
 
275 
# Blocage des IPs du SET blacklist_ip_blocked
 271 
# Blocage des IPs du SET blacklist_ip_blocked
276 
# Deny IPs of the SET blacklist_ip_blocked
272 
# Deny IPs of the SET blacklist_ip_blocked
277 
#if [ $DNS_FILTERING = on ]; then
 273 
#if [ $DNS_FILTERING = on ]; then
278 
#	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked -p icmp -j REJECT --reject-with icmp-port-unreachable
 274 
#	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_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
 275 
#	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
280 
#	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked -p tcp -j REJECT --reject-with tcp-reset
 276 
#	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked -p tcp -j REJECT --reject-with tcp-reset
281 
#fi
 277 
#fi
282 
 
 278 
 
283 
# Autorisation des retours de connexions légitimes
 279 
# Autorisation des retours de connexions légitimes
284 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
 280 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
285 
 
 281 
 
286 
#  If protocols filter is activate
282 
#  If protocols filter is activate
287 
if [ $PROTOCOLS_FILTERING = on ]; then
 283 
if [ $PROTOCOLS_FILTERING = on ]; then
288 
	# Compute exception IP (IP addresses that shouldn't be filtered)
 284 
	# Compute exception IP (IP addresses that shouldn't be filtered)
289 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
 285 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
290 
	if [ $nb_exceptions != "0" ]
 286 
	if [ $nb_exceptions != "0" ]
291 
	then
 287 
	then
292 
		while read ip_exception
288 
		while read ip_exception
293 
		do
 289 
		do
294 
#			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
 290 
#			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
295 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j NETFLOW
 291 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j NETFLOW
296 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
 292 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
297 
		done < /usr/local/etc/alcasar-filter-exceptions
 293 
		done < /usr/local/etc/alcasar-filter-exceptions
298 
	fi
 294 
	fi
299 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
295 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
300 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
 296 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
301 
	if [ $nb_uamallowed != "0" ]
 297 
	if [ $nb_uamallowed != "0" ]
302 
	then
 298 
	then
303 
		while read ip_allowed_line
299 
		while read ip_allowed_line
304 
		do
 300 
		do
305 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
 301 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
306 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
 302 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
307 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
 303 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
308 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
 304 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
309 
		done < /usr/local/etc/alcasar-uamallowed
 305 
		done < /usr/local/etc/alcasar-uamallowed
310 
	fi
 306 
	fi
311 
	# Autorisation des protocoles non commentés
 307 
	# Autorisation des protocoles non commentés
312 
	# Allow non comment protocols
 308 
	# Allow non comment protocols
313 
	while read svc_line
 309 
	while read svc_line
314 
	do
 310 
	do
315 
		svc_on=`echo $svc_line|cut -b1`
 311 
		svc_on=`echo $svc_line|cut -b1`
316 
		if [ $svc_on != "#" ]
 312 
		if [ $svc_on != "#" ]
317 
		then
313 
		then
318 
			svc_name=`echo $svc_line|cut -d" " -f1`
 314 
			svc_name=`echo $svc_line|cut -d" " -f1`
319 
			svc_port=`echo $svc_line|cut -d" " -f2`
 315 
			svc_port=`echo $svc_line|cut -d" " -f2`
320 
			if [ $svc_name = "icmp" ]
 316 
			if [ $svc_name = "icmp" ]
321 
			then
 317 
			then
322 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
 318 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
323 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
319 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
324 
			else
 320 
			else
325 
 
 321 
 
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 "
 322 
#				$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 "
327 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
 323 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
328 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
 324 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j 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 "
 325 
#				$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 "
330 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
 326 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
331 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
 327 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
332 
			fi
 328 
			fi
333 
		fi
 329 
		fi
334 
	done < /usr/local/etc/alcasar-services
 330 
	done < /usr/local/etc/alcasar-services
335 
	# Rejet explicite des autres protocoles
 331 
	# Rejet explicite des autres protocoles
336 
	# reject the others protocols
 332 
	# reject the others protocols
337 
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
 333 
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
338 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 334 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
339 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
 335 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
340 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
336 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
341 
fi
 337 
fi
342 
 
 338 
 
343 
#  If QOS is activate  #
 339 
#  If QOS is activate  #
344 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
 340 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
345 
	. /usr/local/etc/alcasar-iptables-qos.sh
341 
	. /usr/local/etc/alcasar-iptables-qos.sh
346 
fi
 342 
fi
347 
 
 343 
 
348 
# Autorisation des connections sortant du LAN
344 
# Autorisation des connections sortant du LAN
349 
# Allow forward connections with log
 345 
# Allow forward connections with log
350 
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
 346 
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
351 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
 347 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
352 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
 348 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
353 
 
 349 
 
354 
#############################
 350 
#############################
355 
#         OUTPUT            #
 351 
#         OUTPUT            #
356 
#############################
 352 
#############################
357 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
 353 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
358 
# Everything is allowed but traffic through outside network interface
 354 
# Everything is allowed but traffic through outside network interface
359 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
 355 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
360 
 
 356 
 
361 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
357 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
362 
# Allow DNS requests to identified DNS servers
 358 
# Allow DNS requests to identified DNS servers
363 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
 359 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
364 
 
 360 
 
365 
# On autorise les requêtes HTTP sortantes
 361 
# On autorise les requêtes HTTP sortantes
366 
# HTTP requests are allowed
 362 
# HTTP requests are allowed
367 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
 363 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
368 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
 364 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
369 
 
 365 
 
370 
# On autorise les requêtes FTP
366 
# On autorise les requêtes FTP
371 
# FTP requests are allowed
 367 
# FTP requests are allowed
372 
modprobe ip_conntrack_ftp
 368 
modprobe ip_conntrack_ftp
373 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
 369 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
374 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
 370 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
375 
 
 371 
 
376 
# On autorise les requêtes NTP
372 
# On autorise les requêtes NTP
377 
# NTP requests are allowed
 373 
# NTP requests are allowed
378 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
 374 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
379 
 
 375 
 
380 
# On autorise les requêtes ICMP (ping)
376 
# On autorise les requêtes ICMP (ping)
381 
# ICMP (ping) requests are allowed
 377 
# ICMP (ping) requests are allowed
382 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
 378 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
383 
 
 379 
 
384 
# On autorise les requêtes LDAP si un serveur externe est configué
 380 
# On autorise les requêtes LDAP si un serveur externe est configué
385 
# LDAP requests are allowed if an external server is declared
 381 
# LDAP requests are allowed if an external server is declared
386 
if [ $LDAP = on ]
 382 
if [ $LDAP = on ]
387 
	then
 383 
	then
388 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
 384 
	$IPTABLES -A OUTPUT -p tcp -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
 385 
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
390 
fi
 386 
fi
391 
 
 387 
 
392 
 
 388 
 
393 
#############################
 389 
#############################
394 
#       POSTROUTING         #
 390 
#       POSTROUTING         #
395 
#############################
 391 
#############################
396 
# Traduction dynamique d'adresse en sortie
 392 
# Traduction dynamique d'adresse en sortie
397 
# Dynamic NAT on EXTIF
 393 
# Dynamic NAT on EXTIF
398 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
 394 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
399 
 
 395 
 
400 
# Save all rules
 396 
# Save all rules
401 
/etc/init.d/iptables save
 397 
/etc/init.d/iptables save
402 
 
 398 
 
403 
# End of script
 399 
# End of script
404 
 
 400 
 
405 
 
 401