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#!/bin/bash
 1 
#!/bin/bash
2 
# $Id: alcasar-iptables.sh 1154 2013-07-15 14:27:10Z crox53 $
 2 
# $Id: alcasar-iptables.sh 1157 2013-07-16 10:48:11Z stephane $
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 
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 
#lancement du module kernel ipt_NETFLOW (module iptables)
 - 
 
49 
modprobe ipt_NETFLOW destination=127.0.0.1:2055
 - 
 
50 
 
 - 
 
51 
# Effacement des règles existantes
 48 
# Effacement des règles existantes
52 
# Flush all existing rules
 49 
# Flush all existing rules
53 
$IPTABLES -F
 50 
$IPTABLES -F
54 
$IPTABLES -t nat -F
 51 
$IPTABLES -t nat -F
55 
$IPTABLES -t mangle -F
 52 
$IPTABLES -t mangle -F
56 
$IPTABLES -F INPUT
 53 
$IPTABLES -F INPUT
57 
$IPTABLES -F FORWARD
 54 
$IPTABLES -F FORWARD
58 
$IPTABLES -F OUTPUT
 55 
$IPTABLES -F OUTPUT
59 
 
 56 
 
60 
# Suppression des chaines utilisateurs sur les tables filter et nat
 57 
# Suppression des chaines utilisateurs sur les tables filter et nat
61 
# Flush non default rules on filter and nat tables
 58 
# Flush non default rules on filter and nat tables
62 
$IPTABLES -X
 59 
$IPTABLES -X
63 
$IPTABLES -t nat -X
 60 
$IPTABLES -t nat -X
64 
 
 61 
 
65 
# Stratégies par défaut
 62 
# Stratégies par défaut
66 
# Default policies
 63 
# Default policies
67 
$IPTABLES -P INPUT DROP
 64 
$IPTABLES -P INPUT DROP
68 
$IPTABLES -P FORWARD DROP
 65 
$IPTABLES -P FORWARD DROP
69 
$IPTABLES -P OUTPUT DROP
 66 
$IPTABLES -P OUTPUT DROP
70 
$IPTABLES -t nat -P PREROUTING ACCEPT
 67 
$IPTABLES -t nat -P PREROUTING ACCEPT
71 
$IPTABLES -t nat -P POSTROUTING ACCEPT
 68 
$IPTABLES -t nat -P POSTROUTING ACCEPT
72 
$IPTABLES -t nat -P OUTPUT ACCEPT
 69 
$IPTABLES -t nat -P OUTPUT ACCEPT
73 
 
 70 
 
74 
#############################
 71 
#############################
75 
#       PREROUTING          #
 72 
#       PREROUTING          #
76 
#############################
 73 
#############################
77 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
 74 
# 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
 75 
# 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 "
 76 
# $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
 77 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
81 
 
 78 
 
82 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
 79 
# 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
 80 
# 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
 81 
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
85 
# Remark : this port is only open when filtering is on
 82 
# 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 "
 83 
# $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
 84 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
88 
 
 85 
 
89 
# Si le filtrage DNS est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
86 
# 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
 87 
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
91 
if [ $DNS_FILTERING = on ]; then
 88 
if [ $DNS_FILTERING = on ]; then
92 
	# Compute exception IP
 89 
	# Compute exception IP
93 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
 90 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
94 
	if [ $nb_exceptions != "0" ]
 91 
	if [ $nb_exceptions != "0" ]
95 
	then
 92 
	then
96 
		while read ip_exception
93 
		while read ip_exception
97 
		do
 94 
		do
98 
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
 95 
			$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
 96 
		done < /usr/local/etc/alcasar-filter-exceptions
100 
	fi
 97 
	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
 98 
		$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
 99 
fi
103 
 
 100 
 
104 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD
 101 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD
105 
# Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD
 102 
# Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD
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 "
 103 
$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 
# Redirection des requêtes HTTP vers DansGuardian (proxy transparent)
 104 
# Redirection des requêtes HTTP vers DansGuardian (proxy transparent)
108 
# Redirect HTTP requests in DansGuardian (transparent proxy)
 105 
# Redirect HTTP requests in DansGuardian (transparent proxy)
109 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
 106 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
110 
 
 107 
 
111 
# Redirection des requêtes NTP vers le serveur NTP local
 108 
# Redirection des requêtes NTP vers le serveur NTP local
112 
# Redirect NTP request in local NTP server
 109 
# Redirect NTP request in local NTP server
113 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
 110 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
114 
 
 111 
 
115 
#############################
 112 
#############################
116 
#         INPUT             #
 113 
#         INPUT             #
117 
#############################
 114 
#############################
118 
 
 115 
 
119 
# Tout passe sur loopback
 116 
# Tout passe sur loopback
120 
# accept all on loopback
 117 
# accept all on loopback
121 
$IPTABLES -A INPUT -i lo -j ACCEPT
 118 
$IPTABLES -A INPUT -i lo -j ACCEPT
122 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
 119 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
123 
 
 120 
 
124 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
 121 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
125 
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
 122 
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
126 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
 123 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
127 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
 124 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
128 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
 125 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
129 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
 126 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
130 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
 127 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
131 
 
 128 
 
132 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
 129 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
133 
# Drop broadcast & multicast on EXTIF to avoid log
130 
# Drop broadcast & multicast on EXTIF to avoid log
134 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
 131 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
135 
 
 132 
 
136 
# On autorise les retours de connexions légitimes par INPUT
 133 
# On autorise les retours de connexions légitimes par INPUT
137 
# Conntrack on INPUT
 134 
# Conntrack on INPUT
138 
#$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j NETFLOW
 - 
 
139 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
 135 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
140 
 
 136 
 
141 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
 137 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
142 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked in mangle table (PREROUTING)
 138 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked in mangle table (PREROUTING)
143 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
 139 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
144 
 
 140 
 
145 
# Insertion des règles de blocage IP
 141 
# Insertion des règles de blocage IP
146 
# Here, we add IP block rules
142 
# Here, we add IP block rules
147 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
143 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
148 
	while read ip_line
 144 
	while read ip_line
149 
	do
 145 
	do
150 
		ip_on=`echo $ip_line|cut -b1`
 146 
		ip_on=`echo $ip_line|cut -b1`
151 
		if [ $ip_on != "#" ]
 147 
		if [ $ip_on != "#" ]
152 
		then
148 
		then
153 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
 149 
			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 "
 150 
			$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
151 
			$IPTABLES -A INPUT -i $TUNIF -d $ip_blocked -p tcp --dport 8080 -m state --state NEW --syn -j REJECT
156 
		fi
 152 
		fi
157 
	done < /usr/local/etc/alcasar-ip-blocked
 153 
	done < /usr/local/etc/alcasar-ip-blocked
158 
fi
 154 
fi
159 
# Autorisation des connexions légitimes à DansGuardian
155 
# Autorisation des connexions légitimes à DansGuardian
160 
# Allow connections for DansGuardian
 156 
# Allow connections for DansGuardian
161 
#Flux netflow des requêtes HTTP à destination de DansGuardian
 - 
 
162 
#$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -j NETFLOW
 - 
 
163 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
 157 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
164 
 
 158 
 
165 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
 159 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
166 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
 160 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
167 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
 161 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
168 
 
 162 
 
169 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
 163 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
170 
# Allow connections for DNSMASQ (with blackhole)
 164 
# Allow connections for DNSMASQ (with blackhole)
171 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
 165 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
172 
 
 166 
 
173 
# Accès direct aux services internes
 167 
# Accès direct aux services internes
174 
# Internal services access
 168 
# Internal services access
175 
$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 udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
176 
$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 8 -j ACCEPT	# Réponse ping # ping responce
177 
$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 icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
178 
$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 https -j ACCEPT	# Pages d'authentification et MCC # authentication pages and MCC
179 
$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 http -j ACCEPT	# Page d'avertissement filtrage # Filtering warning pages
180 
$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 tcp --dport 3990 -j ACCEPT	# Requêtes de deconnexion usagers # Users logout requests
181 
$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 
$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
182 
 
 176 
 
183 
# SSHD rules if activate
177 
# SSHD rules if activate
184 
if [ $SSH = on ]
 178 
if [ $SSH = on ]
185 
	then
 179 
	then
186 
	$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 -m state --state NEW -j ULOG --ulog-nlgroup 2 --ulog-prefix "RULE ssh-from-LAN -- ACCEPT"
187 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
 181 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
188 
	$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 $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"
189 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW,ESTABLISHED -j ACCEPT
 183 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW,ESTABLISHED -j ACCEPT
190 
fi
 184 
fi
191 
 
 185 
 
192 
# Insertion de règles locales
 186 
# Insertion de règles locales
193 
# Here, we add local rules (i.e. VPN from Internet)
 187 
# Here, we add local rules (i.e. VPN from Internet)
194 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
 188 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
195 
        . /usr/local/etc/alcasar-iptables-local.sh
 189 
        . /usr/local/etc/alcasar-iptables-local.sh
196 
fi
 190 
fi
197 
 
 191 
 
198 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
 192 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
199 
# Deny and log on INPUT from the LAN
 193 
# Deny and log on INPUT from the LAN
200 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
 194 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
201 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 195 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
202 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
 196 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
203 
 
 197 
 
204 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
 198 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
205 
# Reject INTIF access (only when chilli is down)
 199 
# Reject INTIF access (only when chilli is down)
206 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
 200 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
207 
$IPTABLES -A INPUT -i $INTIF -j REJECT
 201 
$IPTABLES -A INPUT -i $INTIF -j REJECT
208 
 
 202 
 
209 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
 203 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
210 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
 204 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
211 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
 205 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
212 
 
 206 
 
213 
 
 207 
 
214 
#############################
 208 
#############################
215 
#        FORWARD            #
 209 
#        FORWARD            #
216 
#############################
 210 
#############################
217 
 
 211 
 
218 
# Rejet des requêtes DNS vers Internet
 212 
# Rejet des requêtes DNS vers Internet
219 
# Deny forward DNS
 213 
# Deny forward DNS
220 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
 214 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
221 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
 215 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
222 
 
 216 
 
223 
# Insertion des règles de blocage IP
 217 
# Insertion des règles de blocage IP
224 
# Here, we add local IP block rules
218 
# Here, we add local IP block rules
225 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
219 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
226 
	while read ip_line
 220 
	while read ip_line
227 
	do
 221 
	do
228 
		ip_on=`echo $ip_line|cut -b1`
 222 
		ip_on=`echo $ip_line|cut -b1`
229 
		if [ $ip_on != "#" ]
 223 
		if [ $ip_on != "#" ]
230 
		then
224 
		then
231 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
 225 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
232 
			$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 -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
233 
			$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 udp -j REJECT --reject-with icmp-port-unreachable
234 
			$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 icmp -j REJECT --reject-with icmp-port-unreachable
235 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
 229 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
236 
		fi
 230 
		fi
237 
	done < /usr/local/etc/alcasar-ip-blocked
 231 
	done < /usr/local/etc/alcasar-ip-blocked
238 
fi
 232 
fi
239 
 
 233 
 
240 
# Si le filtrage de domain est activé, blocage des IP de la BL
234 
# Si le filtrage de domain est activé, blocage des IP de la BL
241 
# If DNS filter is on, reject IP of BL
 235 
# If DNS filter is on, reject IP of BL
242 
# Comment : loading time is too long and iptables should become oveloaded !!!
 236 
# Comment : loading time is too long and iptables should become oveloaded !!!
243 
#if [ $DNS_FILTERING = on ]; then
 237 
#if [ $DNS_FILTERING = on ]; then
244 
#	cd $BL_IP_CAT
 238 
#	cd $BL_IP_CAT
245 
#	for category in `ls -1 | cut -d"@" -f1`
 239 
#	for category in `ls -1 | cut -d"@" -f1`
246 
#	do
 240 
#	do
247 
#		while read ip_blocked
 241 
#		while read ip_blocked
248 
#		do
 242 
#		do
249 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
 243 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
250 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p udp -j REJECT --reject-with icmp-port-unreachable
 244 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p udp -j REJECT --reject-with icmp-port-unreachable
251 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p icmp -j REJECT --reject-with icmp-port-unreachable
 245 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p icmp -j REJECT --reject-with icmp-port-unreachable
252 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
 246 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
253 
#		done < $BL_IP_CAT/$category
 247 
#		done < $BL_IP_CAT/$category
254 
#	done
 248 
#	done
255 
#fi
 249 
#fi
256 
 
 250 
 
257 
# Autorisation des retours de connexions légitimes
 251 
# Autorisation des retours de connexions légitimes
- 
 
 252 
# Allow conntrack
258 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
 253 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
259 
 
 254 
 
260 
#  If protocols filter is activate
255 
#  If protocols filter is activate
261 
if [ $PROTOCOLS_FILTERING = on ]; then
 256 
if [ $PROTOCOLS_FILTERING = on ]; then
262 
	# Compute exception IP (IP addresses that shouldn't be filtered)
 257 
	# Compute exception IP (IP addresses that shouldn't be filtered)
263 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
 258 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
264 
	if [ $nb_exceptions != "0" ]
 259 
	if [ $nb_exceptions != "0" ]
265 
	then
 260 
	then
266 
		while read ip_exception
261 
		while read ip_exception
267 
		do
 262 
		do
268 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
 263 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
269 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j NETFLOW
 - 
 
270 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
 264 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
271 
		done < /usr/local/etc/alcasar-filter-exceptions
 265 
		done < /usr/local/etc/alcasar-filter-exceptions
272 
	fi
 266 
	fi
273 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
267 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
274 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
 268 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
275 
	if [ $nb_uamallowed != "0" ]
 269 
	if [ $nb_uamallowed != "0" ]
276 
	then
 270 
	then
277 
		while read ip_allowed_line
271 
		while read ip_allowed_line
278 
		do
 272 
		do
279 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
 273 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
280 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
 274 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
281 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
 - 
 
282 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
 275 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
283 
		done < /usr/local/etc/alcasar-uamallowed
 276 
		done < /usr/local/etc/alcasar-uamallowed
284 
	fi
 277 
	fi
285 
	# Autorisation des protocoles non commentés
 278 
	# Autorisation des protocoles non commentés
286 
	# Allow non comment protocols
 279 
	# Allow non comment protocols
287 
	while read svc_line
 280 
	while read svc_line
288 
	do
 281 
	do
289 
		svc_on=`echo $svc_line|cut -b1`
 282 
		svc_on=`echo $svc_line|cut -b1`
290 
		if [ $svc_on != "#" ]
 283 
		if [ $svc_on != "#" ]
291 
		then
284 
		then
292 
			svc_name=`echo $svc_line|cut -d" " -f1`
 285 
			svc_name=`echo $svc_line|cut -d" " -f1`
293 
			svc_port=`echo $svc_line|cut -d" " -f2`
 286 
			svc_port=`echo $svc_line|cut -d" " -f2`
294 
			if [ $svc_name = "icmp" ]
 287 
			if [ $svc_name = "icmp" ]
295 
			then
 288 
			then
296 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
 - 
 
297 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
289 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
298 
			else
 290 
			else
299 
 
 - 
 
300 
				$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 "
 291 
				$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 "
301 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
 - 
 
302 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
 292 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
303 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_UDP-$svc_name -- ACCEPT "
 293 
				$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 "
304 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
 - 
 
305 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
 294 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
306 
			fi
 295 
			fi
307 
		fi
 296 
		fi
308 
	done < /usr/local/etc/alcasar-services
 297 
	done < /usr/local/etc/alcasar-services
309 
	# Rejet explicite des autres protocoles
 298 
	# Rejet explicite des autres protocoles
310 
	# reject the others protocols
 299 
	# reject the others protocols
311 
	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
 300 
	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
312 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
 301 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
313 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
 302 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
314 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
303 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
315 
fi
 304 
fi
316 
 
 305 
 
317 
#  If QOS is activate  #
 306 
#  If QOS is activate  #
318 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
 307 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
319 
	. /usr/local/etc/alcasar-iptables-qos.sh
308 
	. /usr/local/etc/alcasar-iptables-qos.sh
320 
fi
 309 
fi
321 
 
 310 
 
322 
# Autorisation des connections sortant du LAN
311 
# Autorisation des connections sortant du LAN
323 
# Allow forward connections with log
 312 
# Allow forward connections with log
324 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
 313 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
325 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
 - 
 
326 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
 314 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
327 
 
 315 
 
328 
#############################
 316 
#############################
329 
#         OUTPUT            #
 317 
#         OUTPUT            #
330 
#############################
 318 
#############################
- 
 
 319 
 
331 
# SSHD rules if activate
320 
# On autorise les retours de connexions légitimes par OUTPUT
332 
if [ $SSH = on ]
 321 
# Conntrack on OUTPUT
333 
	then
 - 
 
334 
	$IPTABLES -A OUTPUT -o $EXTIF -p tcp --sport ssh -m state --state ESTABLISHED -j ACCEPT
 322 
$IPTABLES -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
335 
fi
 323 
 
336 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
 324 
# On laisse tout sortir sur INTIF
337 
# Everything is allowed but traffic through outside network interface
 325 
# Everything is allowed only on INTIF
338 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
 326 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
339 
 
 327 
 
340 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
328 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
341 
# Allow DNS requests to identified DNS servers
 329 
# Allow DNS requests to identified DNS servers
342 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
 330 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
343 
 
 331 
 
344 
# On autorise les requêtes HTTP sortantes
 332 
# On autorise les requêtes HTTP sortantes
345 
# HTTP requests are allowed
 333 
# HTTP requests are allowed
346 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
 - 
 
347 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
 334 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
348 
 
 335 
 
349 
# On autorise les requêtes FTP
336 
# On autorise les requêtes FTP
350 
# FTP requests are allowed
 337 
# FTP requests are allowed
351 
modprobe ip_conntrack_ftp
 338 
modprobe ip_conntrack_ftp
352 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
 339 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
353 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
 - 
 
354 
 
 340 
 
355 
# On autorise les requêtes NTP
341 
# On autorise les requêtes NTP
356 
# NTP requests are allowed
 342 
# NTP requests are allowed
357 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
 343 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
358 
 
 344 
 
359 
# On autorise les requêtes ICMP (ping)
345 
# On autorise les requêtes ICMP (ping)
360 
# ICMP (ping) requests are allowed
 346 
# ICMP (ping) requests are allowed
361 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
 347 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
362 
 
 348 
 
363 
# On autorise les requêtes LDAP si un serveur externe est configué
 349 
# On autorise les requêtes LDAP si un serveur externe est configué
364 
# LDAP requests are allowed if an external server is declared
 350 
# LDAP requests are allowed if an external server is declared
365 
if [ $LDAP = on ]
 351 
if [ $LDAP = on ]
366 
	then
 352 
	then
367 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
 353 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
368 
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
 354 
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
369 
#	$IPTABLES -A INPUT  -p tcp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
 355 
#	$IPTABLES -A INPUT  -p tcp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
370 
#	$IPTABLES -A INPUT  -p udp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
 356 
#	$IPTABLES -A INPUT  -p udp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
371 
fi
 357 
fi
372 
 
 358 
 
373 
 
 - 
 
374 
#############################
 359 
#############################
375 
#       POSTROUTING         #
 360 
#       POSTROUTING         #
376 
#############################
 361 
#############################
377 
# Traduction dynamique d'adresse en sortie
 362 
# Traduction dynamique d'adresse en sortie
378 
# Dynamic NAT on EXTIF
 363 
# Dynamic NAT on EXTIF
379 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
 364 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
380 
 
 365 
 
381 
# Save all rules
 366 
# Save all rules
382 
/etc/init.d/iptables save
 367 
/etc/init.d/iptables save
383 
 
 368 
 
384 
# End of script
 369 
# End of script
385 
 
 370 
 
386 
 
 371