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#!/bin/bash
 1 
#!/bin/bash
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# $Id: alcasar-iptables.sh 1062 2013-04-01 21:20:12Z richard $
 2 
# $Id: alcasar-iptables.sh 1063 2013-04-01 21:36:46Z 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 three channels for log :
 8 
# There are three channels for log :
9 
#	1 (default) for tracability;
 9 
#	1 (default) for tracability;
10 
#	2 for secure admin (ssh);
 10 
#	2 for secure admin (ssh);
11 
#	3 for exterior access attempts.
 11 
#	3 for exterior access attempts.
12 
# The French Security Agency (ANSSI) rules was applied by 'this script
 12 
# The French Security Agency (ANSSI) rules was applied by 'this script
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 
QOS=`grep QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
 32 
QOS=`grep QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
33 
QOS=${QOS:=off}
 33 
QOS=${QOS:=off}
34 
SSH=`grep SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
 34 
SSH=`grep SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
35 
SSH=${SSH:=off}
 35 
SSH=${SSH:=off}
36 
SSH_ADMIN_IP=`grep SSH_ADMIN_IP= $conf_file|cut -d"=" -f2`
 36 
SSH_ADMIN_FROM=`grep SSH_ADMIN_FROM= $conf_file|cut -d"=" -f2`
37 
SSH_ADMIN_IP=${SSH_ADMIN_IP:="0.0.0.0/0.0.0.0"}				# WAN IP address to reduce ssh access (all ip allowed on LAN side)
 37 
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 
LDAP=`grep LDAP= $conf_file|cut -d"=" -f2`				# LDAP external server active (on/off)
 38 
LDAP=`grep LDAP= $conf_file|cut -d"=" -f2`				# LDAP external server active (on/off)
39 
LDAP=${LDAP:=off}
 39 
LDAP=${LDAP:=off}
40 
LDAP_IP=`grep LDAP_IP= $conf_file|cut -d"=" -f2`			# WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
 40 
LDAP_IP=`grep LDAP_IP= $conf_file|cut -d"=" -f2`			# WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
41 
LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
 41 
LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
42 
EXTIF="eth0"
 42 
EXTIF="eth0"
43 
INTIF="eth1"
 43 
INTIF="eth1"
44 
TUNIF="tun0"								# listen device for chilli daemon
 44 
TUNIF="tun0"								# listen device for chilli daemon
45 
IPTABLES="/sbin/iptables"
 45 
IPTABLES="/sbin/iptables"
46 
 
 46 
 
47 
# Effacement des règles existantes
 47 
# Effacement des règles existantes
48 
# Flush all existing rules
 48 
# Flush all existing rules
49 
$IPTABLES -F
 49 
$IPTABLES -F
50 
$IPTABLES -t nat -F
 50 
$IPTABLES -t nat -F
51 
$IPTABLES -t mangle -F
 51 
$IPTABLES -t mangle -F
52 
$IPTABLES -F INPUT
 52 
$IPTABLES -F INPUT
53 
$IPTABLES -F FORWARD
 53 
$IPTABLES -F FORWARD
54 
$IPTABLES -F OUTPUT
 54 
$IPTABLES -F OUTPUT
55 
 
 55 
 
56 
# Suppression des chaines utilisateurs sur les tables filter et nat
 56 
# Suppression des chaines utilisateurs sur les tables filter et nat
57 
# Flush non default rules on filter and nat tables
 57 
# Flush non default rules on filter and nat tables
58 
$IPTABLES -X
 58 
$IPTABLES -X
59 
$IPTABLES -t nat -X
 59 
$IPTABLES -t nat -X
60 
 
 60 
 
61 
# Stratégies par défaut
 61 
# Stratégies par défaut
62 
# Default policies
 62 
# Default policies
63 
$IPTABLES -P INPUT DROP
 63 
$IPTABLES -P INPUT DROP
64 
$IPTABLES -P FORWARD DROP
 64 
$IPTABLES -P FORWARD DROP
65 
$IPTABLES -P OUTPUT DROP
 65 
$IPTABLES -P OUTPUT DROP
66 
$IPTABLES -t nat -P PREROUTING ACCEPT
 66 
$IPTABLES -t nat -P PREROUTING ACCEPT
67 
$IPTABLES -t nat -P POSTROUTING ACCEPT
 67 
$IPTABLES -t nat -P POSTROUTING ACCEPT
68 
$IPTABLES -t nat -P OUTPUT ACCEPT
 68 
$IPTABLES -t nat -P OUTPUT ACCEPT
69 
 
 69 
 
70 
#############################
 70 
#############################
71 
#       PREROUTING          #
 71 
#       PREROUTING          #
72 
#############################
 72 
#############################
73 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
 73 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
74 
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
 74 
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
75 
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j ULOG --ulog-prefix "RULE direct-proxy -- DENY "
 75 
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j ULOG --ulog-prefix "RULE direct-proxy -- DENY "
76 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
 76 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
77 
 
 77 
 
78 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
 78 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
79 
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
 79 
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
80 
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
 80 
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
81 
# Remark : this port is only open when filtering is on
 81 
# Remark : this port is only open when filtering is on
82 
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "
 82 
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "
83 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
 83 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
84 
 
 84 
 
85 
# Si le filtrage est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
85 
# Si le filtrage est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
86 
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
 86 
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
87 
if [ $DNS_FILTERING = on ]; then
 87 
if [ $DNS_FILTERING = on ]; then
88 
	# Compute exception IP
 88 
	# Compute exception IP
89 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
 89 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
90 
	if [ $nb_exceptions != "0" ]
 90 
	if [ $nb_exceptions != "0" ]
91 
	then
 91 
	then
92 
		while read ip_exception
92 
		while read ip_exception
93 
		do
 93 
		do
94 
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
 94 
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
95 
		done < /usr/local/etc/alcasar-filter-exceptions
 95 
		done < /usr/local/etc/alcasar-filter-exceptions
96 
	fi
 96 
	fi
97 
		$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
 97 
		$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
98 
fi
 98 
fi
99 
 
 99 
 
100 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD
 100 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD
101 
# Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD
 101 
# Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD
102 
$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 "
 102 
$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 "
103 
# Redirection des requêtes HTTP vers DansGuardian (proxy transparent)
 103 
# Redirection des requêtes HTTP vers DansGuardian (proxy transparent)
104 
# Redirect HTTP requests in DansGuardian (transparent proxy)
 104 
# Redirect HTTP requests in DansGuardian (transparent proxy)
105 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
 105 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
106 
 
 106 
 
107 
# Redirection des requêtes NTP vers le serveur NTP local
 107 
# Redirection des requêtes NTP vers le serveur NTP local
108 
# Redirect NTP request in local NTP server
 108 
# Redirect NTP request in local NTP server
109 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
 109 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
110 
 
 110 
 
111 
#############################
 111 
#############################
112 
#         INPUT             #
 112 
#         INPUT             #
113 
#############################
 113 
#############################
114 
 
 114 
 
115 
# Tout passe sur loopback
 115 
# Tout passe sur loopback
116 
# accept all on loopback
 116 
# accept all on loopback
117 
$IPTABLES -A INPUT -i lo -j ACCEPT
 117 
$IPTABLES -A INPUT -i lo -j ACCEPT
118 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
 118 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
119 
 
 119 
 
120 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
 120 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
121 
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
 121 
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
122 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
 122 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
123 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
 123 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
124 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
 124 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
125 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
 125 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
126 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
 126 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
127 
 
 127 
 
128 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
 128 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
129 
# Drop broadcast & multicast on EXTIF to avoid log
129 
# Drop broadcast & multicast on EXTIF to avoid log
130 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
 130 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
131 
 
 131 
 
132 
# On autorise les retours de connexions légitimes par INPUT
 132 
# On autorise les retours de connexions légitimes par INPUT
133 
# Conntrack on INPUT
 133 
# Conntrack on INPUT
134 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
 134 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
135 
 
 135 
 
136 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
 136 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
137 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked in mangle table (PREROUTING)
 137 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked in mangle table (PREROUTING)
138 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
 138 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
139 
 
 139 
 
140 
# Insertion des règles de blocage IP
 140 
# Insertion des règles de blocage IP
141 
# Here, we add IP block rules
141 
# Here, we add IP block rules
142 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
142 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
143 
	while read ip_line
 143 
	while read ip_line
144 
	do
 144 
	do
145 
		ip_on=`echo $ip_line|cut -b1`
 145 
		ip_on=`echo $ip_line|cut -b1`
146 
		if [ $ip_on != "#" ]
 146 
		if [ $ip_on != "#" ]
147 
		then
147 
		then
148 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
 148 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
149 
			$IPTABLES -A INPUT -i $TUNIF -d $ip_blocked -p tcp --dport 8080 -m state --state NEW --syn -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
 149 
			$IPTABLES -A INPUT -i $TUNIF -d $ip_blocked -p tcp --dport 8080 -m state --state NEW --syn -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
150 
			$IPTABLES -A INPUT -i $TUNIF -d $ip_blocked -p tcp --dport 8080 -m state --state NEW --syn -j REJECT
150 
			$IPTABLES -A INPUT -i $TUNIF -d $ip_blocked -p tcp --dport 8080 -m state --state NEW --syn -j REJECT
151 
		fi
 151 
		fi
152 
	done < /usr/local/etc/alcasar-ip-blocked
 152 
	done < /usr/local/etc/alcasar-ip-blocked
153 
fi
 153 
fi
154 
# Autorisation des connexions légitimes à DansGuardian
154 
# Autorisation des connexions légitimes à DansGuardian
155 
# Allow connections for DansGuardian
 155 
# Allow connections for DansGuardian
156 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
 156 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
157 
 
 157 
 
158 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
 158 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
159 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
 159 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
160 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
 160 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
161 
 
 161 
 
162 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
 162 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
163 
# Allow connections for DNSMASQ (with blackhole)
 163 
# Allow connections for DNSMASQ (with blackhole)
164 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
 164 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
165 
 
 165 
 
166 
# Accès direct aux services internes
 166 
# Accès direct aux services internes
167 
# Internal services access
 167 
# Internal services access
168 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
 168 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
169 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
 169 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
170 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
 170 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
171 
$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
 171 
$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
172 
$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
 172 
$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
173 
$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
 173 
$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
174 
$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
 174 
$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
175 
 
 175 
 
176 
# SSHD rules if activate
176 
# SSHD rules if activate
177 
if [ $SSH = on ]
 177 
if [ $SSH = on ]
178 
	then
 178 
	then
179 
	$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"
 179 
	$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"
180 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
 180 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
181 
	$IPTABLES -A INPUT -i $EXTIF -s $Admin_from_IP -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW --syn -j ULOG --ulog-nlgroup 2 --ulog-prefix "RULE ssh-from-WAN -- ACCEPT"
 181 
	$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"
182 
	$IPTABLES -A INPUT -i $EXTIF -s $Admin_from_IP -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW,ESTABLISHED -j ACCEPT
 182 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW,ESTABLISHED -j ACCEPT
183 
fi
 183 
fi
184 
 
 184 
 
185 
# Insertion de règles locales
 185 
# Insertion de règles locales
186 
# Here, we add local rules (i.e. VPN from Internet)
 186 
# Here, we add local rules (i.e. VPN from Internet)
187 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
 187 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
188 
        . /usr/local/etc/alcasar-iptables-local.sh
 188 
        . /usr/local/etc/alcasar-iptables-local.sh
189 
fi
 189 
fi
190 
 
 190 
 
191 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
 191 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
192 
# Deny and log on INPUT from the LAN
 192 
# Deny and log on INPUT from the LAN
193 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
 193 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
194 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 194 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
195 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
 195 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
196 
 
 196 
 
197 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
 197 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
198 
# Reject INTIF access (only when chilli is down)
 198 
# Reject INTIF access (only when chilli is down)
199 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
 199 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
200 
$IPTABLES -A INPUT -i $INTIF -j REJECT
 200 
$IPTABLES -A INPUT -i $INTIF -j REJECT
201 
 
 201 
 
202 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
 202 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
203 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
 203 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
204 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
 204 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
205 
 
 205 
 
206 
 
 206 
 
207 
#############################
 207 
#############################
208 
#        FORWARD            #
 208 
#        FORWARD            #
209 
#############################
 209 
#############################
210 
 
 210 
 
211 
# Rejet des requêtes DNS vers Internet
 211 
# Rejet des requêtes DNS vers Internet
212 
# Deny forward DNS
 212 
# Deny forward DNS
213 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
 213 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
214 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
 214 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
215 
 
 215 
 
216 
# Insertion des règles de blocage IP
 216 
# Insertion des règles de blocage IP
217 
# Here, we add IP block rules
217 
# Here, we add IP block rules
218 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
218 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
219 
	while read ip_line
 219 
	while read ip_line
220 
	do
 220 
	do
221 
		ip_on=`echo $ip_line|cut -b1`
 221 
		ip_on=`echo $ip_line|cut -b1`
222 
		if [ $ip_on != "#" ]
 222 
		if [ $ip_on != "#" ]
223 
		then
223 
		then
224 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
 224 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
225 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
 225 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
226 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p udp -j REJECT --reject-with icmp-port-unreachable
 226 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p udp -j REJECT --reject-with icmp-port-unreachable
227 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p icmp -j REJECT --reject-with icmp-port-unreachable
 227 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p icmp -j REJECT --reject-with icmp-port-unreachable
228 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
 228 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
229 
		fi
 229 
		fi
230 
	done < /usr/local/etc/alcasar-ip-blocked
 230 
	done < /usr/local/etc/alcasar-ip-blocked
231 
fi
 231 
fi
232 
 
 232 
 
233 
# Autorisation des retours de connexions légitimes
 233 
# Autorisation des retours de connexions légitimes
234 
# Allow conntrack
 234 
# Allow conntrack
235 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
 235 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
236 
 
 236 
 
237 
#  If protocols filter is activate
237 
#  If protocols filter is activate
238 
if [ $PROTOCOLS_FILTERING = on ]; then
 238 
if [ $PROTOCOLS_FILTERING = on ]; then
239 
	# Compute exception IP (IP addresses that shouldn't be filtered)
 239 
	# Compute exception IP (IP addresses that shouldn't be filtered)
240 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
 240 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
241 
	if [ $nb_exceptions != "0" ]
 241 
	if [ $nb_exceptions != "0" ]
242 
	then
 242 
	then
243 
		while read ip_exception
243 
		while read ip_exception
244 
		do
 244 
		do
245 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
 245 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
246 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
 246 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
247 
		done < /usr/local/etc/alcasar-filter-exceptions
 247 
		done < /usr/local/etc/alcasar-filter-exceptions
248 
	fi
 248 
	fi
249 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
249 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
250 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
 250 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
251 
	if [ $nb_uamallowed != "0" ]
 251 
	if [ $nb_uamallowed != "0" ]
252 
	then
 252 
	then
253 
		while read ip_allowed_line
253 
		while read ip_allowed_line
254 
		do
 254 
		do
255 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
 255 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
256 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
 256 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
257 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
 257 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
258 
		done < /usr/local/etc/alcasar-uamallowed
 258 
		done < /usr/local/etc/alcasar-uamallowed
259 
	fi
 259 
	fi
260 
	# Autorisation des protocoles non commentés
 260 
	# Autorisation des protocoles non commentés
261 
	# Allow non comment protocols
 261 
	# Allow non comment protocols
262 
	while read svc_line
 262 
	while read svc_line
263 
	do
 263 
	do
264 
		svc_on=`echo $svc_line|cut -b1`
 264 
		svc_on=`echo $svc_line|cut -b1`
265 
		if [ $svc_on != "#" ]
 265 
		if [ $svc_on != "#" ]
266 
		then
266 
		then
267 
			svc_name=`echo $svc_line|cut -d" " -f1`
 267 
			svc_name=`echo $svc_line|cut -d" " -f1`
268 
			svc_port=`echo $svc_line|cut -d" " -f2`
 268 
			svc_port=`echo $svc_line|cut -d" " -f2`
269 
			if [ $svc_name = "icmp" ]
 269 
			if [ $svc_name = "icmp" ]
270 
			then
 270 
			then
271 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
271 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
272 
			else
 272 
			else
273 
				$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 "
 273 
				$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 "
274 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
 274 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
275 
				$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 "
 275 
				$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 "
276 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
 276 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
277 
			fi
 277 
			fi
278 
		fi
 278 
		fi
279 
	done < /usr/local/etc/alcasar-services
 279 
	done < /usr/local/etc/alcasar-services
280 
	# Rejet explicite des autres protocoles
 280 
	# Rejet explicite des autres protocoles
281 
	# reject the others protocols
 281 
	# reject the others protocols
282 
	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
 282 
	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
283 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 283 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
284 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
 284 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
285 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
285 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
286 
fi
 286 
fi
287 
 
 287 
 
288 
#  If QOS is activate  #
 288 
#  If QOS is activate  #
289 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
 289 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
290 
	. /usr/local/etc/alcasar-iptables-qos.sh
290 
	. /usr/local/etc/alcasar-iptables-qos.sh
291 
fi
 291 
fi
292 
 
 292 
 
293 
# Autorisation des connections sortant du LAN
293 
# Autorisation des connections sortant du LAN
294 
# Allow forward connections with log
 294 
# Allow forward connections with log
295 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
 295 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
296 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
 296 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
297 
 
 297 
 
298 
#############################
 298 
#############################
299 
#         OUTPUT            #
 299 
#         OUTPUT            #
300 
#############################
 300 
#############################
301 
# SSHD rules if activate
301 
# SSHD rules if activate
302 
if [ $SSH = on ]
 302 
if [ $SSH = on ]
303 
	then
 303 
	then
304 
	$IPTABLES -A OUTPUT -o $EXTIF -p tcp --sport ssh -m state --state ESTABLISHED -j ACCEPT
 304 
	$IPTABLES -A OUTPUT -o $EXTIF -p tcp --sport ssh -m state --state ESTABLISHED -j ACCEPT
305 
fi
 305 
fi
306 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
 306 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
307 
# Everything is allowed but traffic through outside network interface
 307 
# Everything is allowed but traffic through outside network interface
308 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
 308 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
309 
 
 309 
 
310 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
310 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
311 
# Allow DNS requests to identified DNS servers
 311 
# Allow DNS requests to identified DNS servers
312 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
 312 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
313 
 
 313 
 
314 
# On autorise les requêtes HTTP sortantes
 314 
# On autorise les requêtes HTTP sortantes
315 
# HTTP requests are allowed
 315 
# HTTP requests are allowed
316 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
 316 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
317 
 
 317 
 
318 
# On autorise les requêtes FTP
318 
# On autorise les requêtes FTP
319 
# FTP requests are allowed
 319 
# FTP requests are allowed
320 
modprobe ip_conntrack_ftp
 320 
modprobe ip_conntrack_ftp
321 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
 321 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
322 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
 322 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
323 
 
 323 
 
324 
# On autorise les requêtes NTP
324 
# On autorise les requêtes NTP
325 
# NTP requests are allowed
 325 
# NTP requests are allowed
326 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
 326 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
327 
 
 327 
 
328 
# On autorise les requêtes ICMP (ping)
328 
# On autorise les requêtes ICMP (ping)
329 
# ICMP (ping) requests are allowed
 329 
# ICMP (ping) requests are allowed
330 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
 330 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
331 
 
 331 
 
332 
# On autorise les requêtes LDAP si un serveur externe est configué
 332 
# On autorise les requêtes LDAP si un serveur externe est configué
333 
# LDAP requests are allowed if an external server is declared
 333 
# LDAP requests are allowed if an external server is declared
334 
if [ $LDAP = on ]
 334 
if [ $LDAP = on ]
335 
	then
 335 
	then
336 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
 336 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
337 
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
 337 
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
338 
#	$IPTABLES -A INPUT  -p tcp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
 338 
#	$IPTABLES -A INPUT  -p tcp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
339 
#	$IPTABLES -A INPUT  -p udp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
 339 
#	$IPTABLES -A INPUT  -p udp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
340 
fi
 340 
fi
341 
 
 341 
 
342 
 
 342 
 
343 
#############################
 343 
#############################
344 
#       POSTROUTING         #
 344 
#       POSTROUTING         #
345 
#############################
 345 
#############################
346 
# Traduction dynamique d'adresse en sortie
 346 
# Traduction dynamique d'adresse en sortie
347 
# Dynamic NAT on EXTIF
 347 
# Dynamic NAT on EXTIF
348 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
 348 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
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# Save all rules
 350 
# Save all rules
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/etc/init.d/iptables save
 351 
/etc/init.d/iptables save
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# End of script
 353 
# End of script
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