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#!/bin/bash
 1 
#!/bin/bash
2 
# $Id: alcasar-iptables.sh 1230 2013-10-01 07:52:22Z crox53 $
 2 
# $Id: alcasar-iptables.sh 1291 2014-01-10 17:49:15Z 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 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 with the ulog group 2;
12 
#	4 extern access attempts with the ulog group 3.
 12 
#	4 extern access attempts with the ulog group 3.
13 
# The bootps/dhcp (67) port is always open on tun0/eth1 by coova
13 
# The bootps/dhcp (67) port is always open on tun0/eth1 by coova
14 
conf_file="/usr/local/etc/alcasar.conf"
 14 
conf_file="/usr/local/etc/alcasar.conf"
15 
private_ip_mask=`grep PRIVATE_IP= $conf_file|cut -d"=" -f2`
 15 
private_ip_mask=`grep PRIVATE_IP= $conf_file|cut -d"=" -f2`
16 
private_ip_mask=${private_ip_mask:=192.168.182.1/24}
 16 
private_ip_mask=${private_ip_mask:=192.168.182.1/24}
17 
PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1`			# ALCASAR LAN IP address
 17 
PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1`			# ALCASAR LAN IP address
18 
private_network=`/bin/ipcalc -n $private_ip_mask|cut -d"=" -f2`		# LAN IP address (ie.: 192.168.182.0)
 18 
private_network=`/bin/ipcalc -n $private_ip_mask|cut -d"=" -f2`		# LAN IP address (ie.: 192.168.182.0)
19 
private_prefix=`/bin/ipcalc -p $private_ip_mask|cut -d"=" -f2`		# LAN prefix (ie. 24)
 19 
private_prefix=`/bin/ipcalc -p $private_ip_mask|cut -d"=" -f2`		# LAN prefix (ie. 24)
20 
PRIVATE_NETWORK_MASK=$private_network/$private_prefix			# Lan IP address + prefix (192.168.182.0/24)
 20 
PRIVATE_NETWORK_MASK=$private_network/$private_prefix			# Lan IP address + prefix (192.168.182.0/24)
21 
public_ip_mask=`grep PUBLIC_IP= $conf_file|cut -d"=" -f2`		# ALCASAR WAN IP address
 21 
public_ip_mask=`grep PUBLIC_IP= $conf_file|cut -d"=" -f2`		# ALCASAR WAN IP address
22 
PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1`
 22 
PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1`
23 
dns1=`grep DNS1= $conf_file|cut -d"=" -f2`				# first public DNS server
 23 
dns1=`grep DNS1= $conf_file|cut -d"=" -f2`				# first public DNS server
24 
dns1=${dns1:=208.67.220.220}
 24 
dns1=${dns1:=208.67.220.220}
25 
dns2=`grep DNS2= $conf_file|cut -d"=" -f2`				# second public DNS server
 25 
dns2=`grep DNS2= $conf_file|cut -d"=" -f2`				# second public DNS server
26 
dns2=${dns2:=208.67.222.222}
 26 
dns2=${dns2:=208.67.222.222}
27 
DNSSERVERS="$dns1,$dns2"						# first and second DNS IP servers addresses
 27 
DNSSERVERS="$dns1,$dns2"						# first and second DNS IP servers addresses
28 
PROTOCOLS_FILTERING=`grep PROTOCOLS_FILTERING= $conf_file|cut -d"=" -f2`	# Network protocols filter (on/off)
 28 
PROTOCOLS_FILTERING=`grep PROTOCOLS_FILTERING= $conf_file|cut -d"=" -f2`	# Network protocols filter (on/off)
29 
PROTOCOLS_FILTERING=${PROTOCOLS_FILTERING:=off}
 29 
PROTOCOLS_FILTERING=${PROTOCOLS_FILTERING:=off}
30 
DNS_FILTERING=`grep DNS_FILTERING= $conf_file|cut -d"=" -f2`		# DNS and URLs filter (on/off)
 30 
DNS_FILTERING=`grep DNS_FILTERING= $conf_file|cut -d"=" -f2`		# DNS and URLs filter (on/off)
31 
DNS_FILTERING=${DNS_FILTERING:=off}
 31 
DNS_FILTERING=${DNS_FILTERING:=off}
32 
BL_IP_CAT="/usr/local/share/iptables-bl-enabled"			# categories files of the BlackListed IP
 32 
BL_IP_CAT="/usr/local/share/iptables-bl-enabled"			# categories files of the BlackListed IP
33 
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 
#lancement du module kernel ipt_NETFLOW (module iptables)
 49 
# loading of NetFlow probe (ipt_NETFLOW kernel module)
49 
modprobe ipt_NETFLOW destination=127.0.0.1:2055
 50 
modprobe ipt_NETFLOW destination=127.0.0.1:2055
50 
 
 51 
 
51 
# Effacement des règles existantes
 52 
# Effacement des règles existantes
52 
# Flush all existing rules
 53 
# Flush all existing rules
53 
$IPTABLES -F
 54 
$IPTABLES -F
54 
$IPTABLES -t nat -F
 55 
$IPTABLES -t nat -F
55 
$IPTABLES -t mangle -F
 56 
$IPTABLES -t mangle -F
56 
$IPTABLES -F INPUT
 57 
$IPTABLES -F INPUT
57 
$IPTABLES -F FORWARD
 58 
$IPTABLES -F FORWARD
58 
$IPTABLES -F OUTPUT
 59 
$IPTABLES -F OUTPUT
59 
 
 60 
 
60 
# Suppression des chaines utilisateurs sur les tables filter et nat
 61 
# Suppression des chaines utilisateurs sur les tables filter et nat
61 
# Flush non default rules on filter and nat tables
 62 
# Flush non default rules on filter and nat tables
62 
$IPTABLES -X
 63 
$IPTABLES -X
63 
$IPTABLES -t nat -X
 64 
$IPTABLES -t nat -X
64 
 
 65 
 
65 
# Stratégies par défaut
 66 
# Stratégies par défaut
66 
# Default policies
 67 
# Default policies
67 
$IPTABLES -P INPUT DROP
 68 
$IPTABLES -P INPUT DROP
68 
$IPTABLES -P FORWARD DROP
 69 
$IPTABLES -P FORWARD DROP
69 
$IPTABLES -P OUTPUT DROP
 70 
$IPTABLES -P OUTPUT DROP
70 
$IPTABLES -t nat -P PREROUTING ACCEPT
 71 
$IPTABLES -t nat -P PREROUTING ACCEPT
71 
$IPTABLES -t nat -P POSTROUTING ACCEPT
 72 
$IPTABLES -t nat -P POSTROUTING ACCEPT
72 
$IPTABLES -t nat -P OUTPUT ACCEPT
 73 
$IPTABLES -t nat -P OUTPUT ACCEPT
73 
 
 74 
 
- 
 
 75 
# destruction de tous les SET
- 
 
 76 
# destroy all the SET
- 
 
 77 
ipset destroy
- 
 
 78 
 
- 
 
 79 
# Création du SET alcasar_ip_blocked et premier peuplement
- 
 
 80 
# creation of alcasar_ip_blocked SET and first populating
- 
 
 81 
ipset create alcasar_ip_blocked hash:net hashsize 1024
- 
 
 82 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
- 
 
 83 
	while read ip_line
- 
 
 84 
	do
- 
 
 85 
		ip_on=`echo $ip_line|cut -b1`
- 
 
 86 
		if [ $ip_on != "#" ]
- 
 
 87 
		then
- 
 
 88 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
- 
 
 89 
			echo $ip_blocked
- 
 
 90 
			ipset add alcasar_ip_blocked $ip_blocked
- 
 
 91 
		fi
- 
 
 92 
	done < /usr/local/etc/alcasar-ip-blocked
- 
 
 93 
fi
- 
 
 94 
 
74 
#############################
 95 
#############################
75 
#       PREROUTING          #
 96 
#       PREROUTING          #
76 
#############################
 97 
#############################
77 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
 98 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
78 
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
 99 
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
79 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j ULOG --ulog-prefix "RULE direct-proxy -- DENY "
 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 "
80 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
 101 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
81 
 
 102 
 
82 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
 103 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
83 
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
 104 
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
84 
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
 105 
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
85 
# Remark : this port is only open when filtering is on
 106 
# Remark : this port is only open when filtering is on
86 
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "
 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 "
87 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
 108 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
88 
 
 109 
 
89 
# Si le filtrage DNS est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
110 
# Si le filtrage DNS est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
90 
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
 111 
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
91 
if [ $DNS_FILTERING = on ]; then
 112 
if [ $DNS_FILTERING = on ]; then
92 
	# Compute exception IP
 113 
	# Compute exception IP
93 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
 114 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
94 
	if [ $nb_exceptions != "0" ]
 115 
	if [ $nb_exceptions != "0" ]
95 
	then
 116 
	then
96 
		while read ip_exception
117 
		while read ip_exception
97 
		do
 118 
		do
98 
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
 119 
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
99 
		done < /usr/local/etc/alcasar-filter-exceptions
 120 
		done < /usr/local/etc/alcasar-filter-exceptions
100 
	fi
 121 
	fi
101 
		$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
 122 
		$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
102 
fi
 123 
fi
- 
 
 124 
# Redirection des requêtes HTTP des IP bloquées vers ALCASAR (page 'accès interdit')
- 
 
 125 
# Redirect HTTP requests of 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
103 
 
 127 
 
104 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD
 128 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
105 
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD
 129 
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
106 
$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 "
 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 "
107 
 
 131 
 
108 
# Redirection des requêtes HTTP vers DansGuardian (proxy transparent)
 132 
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent)
109 
# Redirect HTTP requests in DansGuardian (transparent proxy)
 133 
# Redirect outbound HTTP requests to DansGuardian (transparent proxy)
110 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
 134 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
111 
 
 135 
 
112 
# Redirection des requêtes NTP vers le serveur NTP local
 136 
# Redirection des requêtes NTP vers le serveur NTP local
113 
# Redirect NTP request in local NTP server
 137 
# Redirect NTP request in local NTP server
114 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
 138 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
115 
 
 139 
 
116 
#############################
 140 
#############################
117 
#         INPUT             #
 141 
#         INPUT             #
118 
#############################
 142 
#############################
119 
 
 143 
 
120 
# Tout passe sur loopback
 144 
# Tout passe sur loopback
121 
# accept all on loopback
 145 
# accept all on loopback
122 
$IPTABLES -A INPUT -i lo -j ACCEPT
 146 
$IPTABLES -A INPUT -i lo -j ACCEPT
123 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
 147 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
124 
 
 148 
 
125 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
 149 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
126 
# Drop non standard connexions (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)
127 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
 151 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
128 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
 152 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
129 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
 153 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
130 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
 154 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
131 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
 155 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
132 
 
 156 
 
133 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
 157 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
134 
# Drop broadcast & multicast on EXTIF to avoid log
158 
# Drop broadcast & multicast on EXTIF to avoid log
135 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
 159 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
136 
 
 160 
 
137 
# On autorise les retours de connexions légitimes par INPUT
 161 
# On autorise les retours de connexions légitimes par INPUT
138 
# Conntrack on INPUT
 162 
# Conntrack on INPUT
139 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
 163 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
140 
 
 164 
 
141 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
 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)
142 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
 166 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
143 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
 167 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
144 
 
 168 
 
145 
# Insertion des règles de blocage IP
 - 
 
146 
# Here, we add IP block rules
- 
 
147 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
- 
 
148 
	while read ip_line
 - 
 
149 
	do
 - 
 
150 
		ip_on=`echo $ip_line|cut -b1`
 - 
 
151 
		if [ $ip_on != "#" ]
 - 
 
152 
		then
- 
 
153 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
 - 
 
154 
#			$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 "
 - 
 
155 
			$IPTABLES -A INPUT -i $TUNIF -d $ip_blocked -p tcp --dport 8080 -m state --state NEW --syn -j REJECT
- 
 
156 
		fi
 - 
 
157 
	done < /usr/local/etc/alcasar-ip-blocked
 - 
 
158 
fi
 - 
 
159 
# Autorisation des connexions légitimes à DansGuardian
169 
# Autorisation des connexions légitimes à DansGuardian
160 
# Allow connections for DansGuardian
 170 
# Allow connections for DansGuardian
161 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
 171 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
162 
 
 172 
 
163 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
 173 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
164 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
 174 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
165 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
 175 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
166 
 
 176 
 
167 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
 177 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
168 
# Allow connections for DNSMASQ (with blackhole)
 178 
# Allow connections for DNSMASQ (with blackhole)
169 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
 179 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
170 
 
 180 
 
171 
# Accès direct aux services internes
 181 
# Accès direct aux services internes
172 
# Internal services access
 182 
# Internal services access
173 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
 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
174 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
 184 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
175 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
 185 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
176 
$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
 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
177 
$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
 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
178 
$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
 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
179 
$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
 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
180 
 
 190 
 
181 
# SSHD rules if activate
191 
# SSHD rules if activate
182 
if [ $SSH = on ]
 192 
if [ $SSH = on ]
183 
	then
 193 
	then
184 
	$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"
 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"
185 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
 195 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
186 
	$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"
 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"
187 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
 197 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
188 
fi
 198 
fi
189 
 
 199 
 
190 
# Insertion de règles locales
 200 
# Insertion de règles locales
191 
# Here, we add local rules (i.e. VPN from Internet)
 201 
# Here, we add local rules (i.e. VPN from Internet)
192 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
 202 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
193 
        . /usr/local/etc/alcasar-iptables-local.sh
 203 
        . /usr/local/etc/alcasar-iptables-local.sh
194 
fi
 204 
fi
195 
 
 205 
 
196 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
 206 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
197 
# Deny and log on INPUT from the LAN
 207 
# Deny and log on INPUT from the LAN
198 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
 208 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
199 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 209 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
200 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
 210 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
201 
 
 211 
 
202 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
 212 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
203 
# Reject INTIF access (only when chilli is down)
 213 
# Reject INTIF access (only when chilli is down)
204 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
 214 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
205 
$IPTABLES -A INPUT -i $INTIF -j REJECT
 215 
$IPTABLES -A INPUT -i $INTIF -j REJECT
206 
 
 216 
 
207 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
 217 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
208 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
 218 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
209 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
 219 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
210 
 
 220 
 
211 
 
 221 
 
212 
#############################
 222 
#############################
213 
#        FORWARD            #
 223 
#        FORWARD            #
214 
#############################
 224 
#############################
215 
 
 225 
 
216 
# Rejet des requêtes DNS vers Internet
 226 
# Rejet des requêtes DNS vers Internet
217 
# Deny forward DNS
 227 
# Deny forward DNS
218 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
 228 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
219 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
 229 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
220 
 
 230 
 
221 
# Insertion des règles de blocage IP
 231 
# Blocage des IPs du SET alcasar_ip_blocked
222 
# Here, we add local IP block rules
232 
# Deny IPs of the SET alcasar_ip_blocked
223 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
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
224 
	while read ip_line
 - 
 
225 
	do
 - 
 
226 
		ip_on=`echo $ip_line|cut -b1`
 - 
 
227 
		if [ $ip_on != "#" ]
 - 
 
228 
		then
- 
 
229 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
 - 
 
230 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p udp -j REJECT --reject-with icmp-port-unreachable
 234 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
231 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p icmp -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
232 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
 236 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset
233 
		fi
 - 
 
234 
	done < /usr/local/etc/alcasar-ip-blocked
 - 
 
235 
fi
 - 
 
236 
 
 237 
 
237 
# Si le filtrage de domain est activé, blocage des IP de la BL
238 
# Si le filtrage de domain est activé, blocage des IP de la BL
238 
# If DNS filter is on, reject IP of BL
 239 
# If DNS filter is on, reject IP of BL
239 
# Comment : loading time is too long and iptables should become oveloaded !!! should use "ipset" instead
 240 
# Comment : loading time is too long and iptables should become oveloaded !!! should use "ipset" instead
240 
#if [ $DNS_FILTERING = on ]; then
 241 
#if [ $DNS_FILTERING = on ]; then
241 
#	cd $BL_IP_CAT
 242 
#	cd $BL_IP_CAT
242 
#	for category in `ls -1 | cut -d"@" -f1`
 243 
#	for category in `ls -1 | cut -d"@" -f1`
243 
#	do
 244 
#	do
244 
#		while read ip_blocked
 245 
#		while read ip_blocked
245 
#		do
 246 
#		do
246 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
 247 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
247 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p udp -j REJECT --reject-with icmp-port-unreachable
 248 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p udp -j REJECT --reject-with icmp-port-unreachable
248 
#			$IPTABLES -A FORWARD -i $TUNIF -d $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
249 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
 250 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
250 
#		done < $BL_IP_CAT/$category
 251 
#		done < $BL_IP_CAT/$category
251 
#	done
 252 
#	done
252 
#fi
 253 
#fi
253 
 
 254 
 
254 
# Autorisation des retours de connexions légitimes
 255 
# Autorisation des retours de connexions légitimes
255 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
 256 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
256 
 
 257 
 
257 
#  If protocols filter is activate
258 
#  If protocols filter is activate
258 
if [ $PROTOCOLS_FILTERING = on ]; then
 259 
if [ $PROTOCOLS_FILTERING = on ]; then
259 
	# Compute exception IP (IP addresses that shouldn't be filtered)
 260 
	# Compute exception IP (IP addresses that shouldn't be filtered)
260 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
 261 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
261 
	if [ $nb_exceptions != "0" ]
 262 
	if [ $nb_exceptions != "0" ]
262 
	then
 263 
	then
263 
		while read ip_exception
264 
		while read ip_exception
264 
		do
 265 
		do
265 
#			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
 266 
#			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
266 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j NETFLOW
 267 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j NETFLOW
267 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
 268 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
268 
		done < /usr/local/etc/alcasar-filter-exceptions
 269 
		done < /usr/local/etc/alcasar-filter-exceptions
269 
	fi
 270 
	fi
270 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
271 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
271 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
 272 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
272 
	if [ $nb_uamallowed != "0" ]
 273 
	if [ $nb_uamallowed != "0" ]
273 
	then
 274 
	then
274 
		while read ip_allowed_line
275 
		while read ip_allowed_line
275 
		do
 276 
		do
276 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
 277 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
277 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
 278 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
278 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
 279 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
279 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
 280 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
280 
		done < /usr/local/etc/alcasar-uamallowed
 281 
		done < /usr/local/etc/alcasar-uamallowed
281 
	fi
 282 
	fi
282 
	# Autorisation des protocoles non commentés
 283 
	# Autorisation des protocoles non commentés
283 
	# Allow non comment protocols
 284 
	# Allow non comment protocols
284 
	while read svc_line
 285 
	while read svc_line
285 
	do
 286 
	do
286 
		svc_on=`echo $svc_line|cut -b1`
 287 
		svc_on=`echo $svc_line|cut -b1`
287 
		if [ $svc_on != "#" ]
 288 
		if [ $svc_on != "#" ]
288 
		then
289 
		then
289 
			svc_name=`echo $svc_line|cut -d" " -f1`
 290 
			svc_name=`echo $svc_line|cut -d" " -f1`
290 
			svc_port=`echo $svc_line|cut -d" " -f2`
 291 
			svc_port=`echo $svc_line|cut -d" " -f2`
291 
			if [ $svc_name = "icmp" ]
 292 
			if [ $svc_name = "icmp" ]
292 
			then
 293 
			then
293 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
 294 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
294 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
295 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
295 
			else
 296 
			else
296 
 
 297 
 
297 
#				$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 "
 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 "
298 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
 299 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
299 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
 300 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
300 
#				$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 "
 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 "
301 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
 302 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
302 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
 303 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
303 
			fi
 304 
			fi
304 
		fi
 305 
		fi
305 
	done < /usr/local/etc/alcasar-services
 306 
	done < /usr/local/etc/alcasar-services
306 
	# Rejet explicite des autres protocoles
 307 
	# Rejet explicite des autres protocoles
307 
	# reject the others protocols
 308 
	# reject the others protocols
308 
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
 309 
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
309 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 310 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
310 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
 311 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
311 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
312 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
312 
fi
 313 
fi
313 
 
 314 
 
314 
#  If QOS is activate  #
 315 
#  If QOS is activate  #
315 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
 316 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
316 
	. /usr/local/etc/alcasar-iptables-qos.sh
317 
	. /usr/local/etc/alcasar-iptables-qos.sh
317 
fi
 318 
fi
318 
 
 319 
 
319 
# Autorisation des connections sortant du LAN
320 
# Autorisation des connections sortant du LAN
320 
# Allow forward connections with log
 321 
# Allow forward connections with log
321 
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
 322 
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
322 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
 323 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
323 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
 324 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
324 
 
 325 
 
325 
#############################
 326 
#############################
326 
#         OUTPUT            #
 327 
#         OUTPUT            #
327 
#############################
 328 
#############################
328 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
 329 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
329 
# Everything is allowed but traffic through outside network interface
 330 
# Everything is allowed but traffic through outside network interface
330 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
 331 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
331 
 
 332 
 
332 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
333 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
333 
# Allow DNS requests to identified DNS servers
 334 
# Allow DNS requests to identified DNS servers
334 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
 335 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
335 
 
 336 
 
336 
# On autorise les requêtes HTTP sortantes
 337 
# On autorise les requêtes HTTP sortantes
337 
# HTTP requests are allowed
 338 
# HTTP requests are allowed
338 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
 339 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
339 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
 340 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
340 
 
 341 
 
341 
# On autorise les requêtes FTP
342 
# On autorise les requêtes FTP
342 
# FTP requests are allowed
 343 
# FTP requests are allowed
343 
modprobe ip_conntrack_ftp
 344 
modprobe ip_conntrack_ftp
344 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
 345 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
345 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
 346 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
346 
 
 347 
 
347 
# On autorise les requêtes NTP
348 
# On autorise les requêtes NTP
348 
# NTP requests are allowed
 349 
# NTP requests are allowed
349 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
 350 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
350 
 
 351 
 
351 
# On autorise les requêtes ICMP (ping)
352 
# On autorise les requêtes ICMP (ping)
352 
# ICMP (ping) requests are allowed
 353 
# ICMP (ping) requests are allowed
353 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
 354 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
354 
 
 355 
 
355 
# On autorise les requêtes LDAP si un serveur externe est configué
 356 
# On autorise les requêtes LDAP si un serveur externe est configué
356 
# LDAP requests are allowed if an external server is declared
 357 
# LDAP requests are allowed if an external server is declared
357 
if [ $LDAP = on ]
 358 
if [ $LDAP = on ]
358 
	then
 359 
	then
359 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
 360 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
360 
	$IPTABLES -A OUTPUT -p udp -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
361 
fi
 362 
fi
362 
 
 363 
 
363 
 
 364 
 
364 
#############################
 365 
#############################
365 
#       POSTROUTING         #
 366 
#       POSTROUTING         #
366 
#############################
 367 
#############################
367 
# Traduction dynamique d'adresse en sortie
 368 
# Traduction dynamique d'adresse en sortie
368 
# Dynamic NAT on EXTIF
 369 
# Dynamic NAT on EXTIF
369 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
 370 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
370 
 
 371 
 
371 
# Save all rules
 372 
# Save all rules
372 
/etc/init.d/iptables save
 373 
/etc/init.d/iptables save
373 
 
 374 
 
374 
# End of script
 375 
# End of script
375 
 
 376 
 
376 
 
 377