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872 richard 1 
#!/bin/bash
64 franck 2 
# $Id: alcasar-iptables.sh 1157 2013-07-16 10:48:11Z stephane $
675 richard 3 
# Script de mise en place des regles du parefeu d'Alcasar (mode normal)
568 richard 4 
# This script write the netfilter rules for ALCASAR
675 richard 5 
# Rexy - 3abtux - CPN
6 
#
7 
# Reminders
568 richard 8 
# There are three channels for log :
498 richard 9 
#	1 (default) for tracability;
10 
#	2 for secure admin (ssh);
11 
#	3 for exterior access attempts.
783 richard 12 
# The French Security Agency (ANSSI) rules was applied by 'this script
675 richard 13 
# The bootps/dhcp (67) port is always open on tun0/eth1 by coova
612 richard 14 
conf_file="/usr/local/etc/alcasar.conf"
766 richard 15 
private_ip_mask=`grep PRIVATE_IP= $conf_file|cut -d"=" -f2`
615 richard 16 
private_ip_mask=${private_ip_mask:=192.168.182.1/24}
783 richard 17 
PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1`			# ALCASAR LAN IP address
604 richard 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 $private_ip_mask|cut -d"=" -f2`		# LAN prefix (ie. 24)
783 richard 20 
PRIVATE_NETWORK_MASK=$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
22 
PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1`
766 richard 23 
dns1=`grep DNS1= $conf_file|cut -d"=" -f2`				# first public DNS server
615 richard 24 
dns1=${dns1:=208.67.220.220}
766 richard 25 
dns2=`grep DNS2= $conf_file|cut -d"=" -f2`				# second public DNS server
615 richard 26 
dns2=${dns2:=208.67.222.222}
783 richard 27 
DNSSERVERS="$dns1,$dns2"						# first and second DNS IP servers addresses
766 richard 28 
PROTOCOLS_FILTERING=`grep PROTOCOLS_FILTERING= $conf_file|cut -d"=" -f2`	# Network protocols filter (on/off)
615 richard 29 
PROTOCOLS_FILTERING=${PROTOCOLS_FILTERING:=off}
766 richard 30 
DNS_FILTERING=`grep DNS_FILTERING= $conf_file|cut -d"=" -f2`		# DNS and URLs filter (on/off)
615 richard 31 
DNS_FILTERING=${DNS_FILTERING:=off}
1072 richard 32 
BL_IP_CAT="/usr/local/share/iptables-bl-enabled"			# categories files of the BlackListed IP
783 richard 33 
QOS=`grep QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
615 richard 34 
QOS=${QOS:=off}
783 richard 35 
SSH=`grep SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
615 richard 36 
SSH=${SSH:=off}
1063 richard 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)
783 richard 39 
LDAP=`grep LDAP= $conf_file|cut -d"=" -f2`				# LDAP external server active (on/off)
615 richard 40 
LDAP=${LDAP:=off}
783 richard 41 
LDAP_IP=`grep LDAP_IP= $conf_file|cut -d"=" -f2`			# WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
768 richard 42 
LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
675 richard 43 
EXTIF="eth0"
1 root 44 
INTIF="eth1"
783 richard 45 
TUNIF="tun0"								# listen device for chilli daemon
612 richard 46 
IPTABLES="/sbin/iptables"
1 root 47 
 
498 richard 48 
# Effacement des règles existantes
476 richard 49 
# Flush all existing rules
1 root 50 
$IPTABLES -F
51 
$IPTABLES -t nat -F
52 
$IPTABLES -t mangle -F
53 
$IPTABLES -F INPUT
54 
$IPTABLES -F FORWARD
55 
$IPTABLES -F OUTPUT
56 
 
498 richard 57 
# Suppression des chaines utilisateurs sur les tables filter et nat
58 
# Flush non default rules on filter and nat tables
59 
$IPTABLES -X
60 
$IPTABLES -t nat -X
61 
 
62 
# Stratégies par défaut
476 richard 63 
# Default policies
1 root 64 
$IPTABLES -P INPUT DROP
65 
$IPTABLES -P FORWARD DROP
498 richard 66 
$IPTABLES -P OUTPUT DROP
1 root 67 
$IPTABLES -t nat -P PREROUTING ACCEPT
68 
$IPTABLES -t nat -P POSTROUTING ACCEPT
69 
$IPTABLES -t nat -P OUTPUT ACCEPT
70 
 
472 richard 71 
#############################
783 richard 72 
#       PREROUTING          #
472 richard 73 
#############################
783 richard 74 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
75 
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
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 "
77 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
1 root 78 
 
783 richard 79 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
80 
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
81 
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
82 
# Remark : this port is only open when filtering is on
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 "
84 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
85 
 
1072 richard 86 
# Si le filtrage DNS est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
783 richard 87 
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
88 
if [ $DNS_FILTERING = on ]; then
89 
	# Compute exception IP
90 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
91 
	if [ $nb_exceptions != "0" ]
92 
	then
93 
		while read ip_exception
94 
		do
95 
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
96 
		done < /usr/local/etc/alcasar-filter-exceptions
97 
	fi
98 
		$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
99 
fi
100 
 
101 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD
102 
# Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD
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 "
104 
# Redirection des requêtes HTTP vers DansGuardian (proxy transparent)
105 
# Redirect HTTP requests in DansGuardian (transparent proxy)
106 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
107 
 
108 
# Redirection des requêtes NTP vers le serveur NTP local
109 
# Redirect NTP request in local NTP server
110 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
111 
 
472 richard 112 
#############################
783 richard 113 
#         INPUT             #
472 richard 114 
#############################
871 richard 115 
 
783 richard 116 
# Tout passe sur loopback
117 
# accept all on loopback
118 
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 119 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 120 
 
121 
# Rejet des demandes de connexions non conformes (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)
472 richard 123 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
124 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
125 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
126 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
675 richard 127 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
498 richard 128 
 
871 richard 129 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
130 
# Drop broadcast & multicast on EXTIF to avoid log
783 richard 131 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 132 
 
783 richard 133 
# On autorise les retours de connexions légitimes par INPUT
134 
# Conntrack on INPUT
135 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
373 richard 136 
 
783 richard 137 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
138 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked in mangle table (PREROUTING)
139 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 140 
 
859 richard 141 
# Insertion des règles de blocage IP
142 
# Here, we add IP block rules
143 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
144 
	while read ip_line
145 
	do
146 
		ip_on=`echo $ip_line|cut -b1`
147 
		if [ $ip_on != "#" ]
148 
		then
149 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
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 "
151 
			$IPTABLES -A INPUT -i $TUNIF -d $ip_blocked -p tcp --dport 8080 -m state --state NEW --syn -j REJECT
152 
		fi
153 
	done < /usr/local/etc/alcasar-ip-blocked
154 
fi
783 richard 155 
# Autorisation des connexions légitimes à DansGuardian
156 
# Allow connections for DansGuardian
157 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
373 richard 158 
 
783 richard 159 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
160 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
161 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
791 richard 162 
 
783 richard 163 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
164 
# Allow connections for DNSMASQ (with blackhole)
165 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
166 
 
167 
# Accès direct aux services internes
168 
# Internal services access
786 richard 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
170 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
171 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
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
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
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
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
783 richard 176 
 
177 
# SSHD rules if activate
178 
if [ $SSH = on ]
520 richard 179 
	then
783 richard 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"
181 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
1063 richard 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"
183 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW,ESTABLISHED -j ACCEPT
520 richard 184 
fi
783 richard 185 
 
186 
# Insertion de règles locales
187 
# Here, we add local rules (i.e. VPN from Internet)
188 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
189 
        . /usr/local/etc/alcasar-iptables-local.sh
190 
fi
191 
 
192 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
193 
# Deny and log on INPUT from the LAN
194 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
195 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
196 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
197 
 
198 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
199 
# Reject INTIF access (only when chilli is down)
200 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
201 
$IPTABLES -A INPUT -i $INTIF -j REJECT
202 
 
203 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
204 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
205 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
206 
 
871 richard 207 
 
783 richard 208 
#############################
209 
#        FORWARD            #
210 
#############################
211 
 
212 
# Rejet des requêtes DNS vers Internet
213 
# Deny forward DNS
214 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
215 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
216 
 
859 richard 217 
# Insertion des règles de blocage IP
1072 richard 218 
# Here, we add local IP block rules
859 richard 219 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
220 
	while read ip_line
221 
	do
222 
		ip_on=`echo $ip_line|cut -b1`
223 
		if [ $ip_on != "#" ]
224 
		then
225 
			ip_blocked=`echo $ip_line|cut -d" " -f1`
226 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
227 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p udp -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
229 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
230 
		fi
231 
	done < /usr/local/etc/alcasar-ip-blocked
790 richard 232 
fi
859 richard 233 
 
1072 richard 234 
# Si le filtrage de domain est activé, blocage des IP de la BL
235 
# If DNS filter is on, reject IP of BL
236 
# Comment : loading time is too long and iptables should become oveloaded !!!
237 
#if [ $DNS_FILTERING = on ]; then
238 
#	cd $BL_IP_CAT
239 
#	for category in `ls -1 | cut -d"@" -f1`
240 
#	do
241 
#		while read ip_blocked
242 
#		do
243 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
244 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p udp -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
246 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
247 
#		done < $BL_IP_CAT/$category
248 
#	done
249 
#fi
250 
 
815 richard 251 
# Autorisation des retours de connexions légitimes
1157 stephane 252 
# Allow conntrack
815 richard 253 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 254 
 
783 richard 255 
#  If protocols filter is activate
612 richard 256 
if [ $PROTOCOLS_FILTERING = on ]; then
688 richard 257 
	# Compute exception IP (IP addresses that shouldn't be filtered)
258 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
373 richard 259 
	if [ $nb_exceptions != "0" ]
260 
	then
261 
		while read ip_exception
262 
		do
263 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
264 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
265 
		done < /usr/local/etc/alcasar-filter-exceptions
266 
	fi
871 richard 267 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
268 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
269 
	if [ $nb_uamallowed != "0" ]
688 richard 270 
	then
271 
		while read ip_allowed_line
272 
		do
273 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
274 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
275 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
276 
		done < /usr/local/etc/alcasar-uamallowed
277 
	fi
520 richard 278 
	# Autorisation des protocoles non commentés
476 richard 279 
	# Allow non comment protocols
373 richard 280 
	while read svc_line
281 
	do
282 
		svc_on=`echo $svc_line|cut -b1`
283 
		if [ $svc_on != "#" ]
284 
		then
285 
			svc_name=`echo $svc_line|cut -d" " -f1`
286 
			svc_port=`echo $svc_line|cut -d" " -f2`
287 
			if [ $svc_name = "icmp" ]
288 
			then
859 richard 289 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
373 richard 290 
			else
859 richard 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 "
292 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j 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 "
294 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
373 richard 295 
			fi
296 
		fi
297 
	done < /usr/local/etc/alcasar-services
783 richard 298 
	# Rejet explicite des autres protocoles
299 
	# reject the others protocols
300 
	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
373 richard 301 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
302 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
303 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
1 root 304 
fi
492 franck 305 
 
306 
#  If QOS is activate  #
612 richard 307 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
492 franck 308 
	. /usr/local/etc/alcasar-iptables-qos.sh
309 
fi
310 
 
498 richard 311 
# Autorisation des connections sortant du LAN
476 richard 312 
# Allow forward connections with log
859 richard 313 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
314 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
1 root 315 
 
783 richard 316 
#############################
317 
#         OUTPUT            #
318 
#############################
1157 stephane 319 
 
320 
# On autorise les retours de connexions légitimes par OUTPUT
321 
# Conntrack on OUTPUT
322 
$IPTABLES -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
323 
 
324 
# On laisse tout sortir sur INTIF
325 
# Everything is allowed only on INTIF
498 richard 326 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 327 
 
503 richard 328 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
498 richard 329 
# Allow DNS requests to identified DNS servers
330 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 331 
 
615 richard 332 
# On autorise les requêtes HTTP sortantes
498 richard 333 
# HTTP requests are allowed
334 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 335 
 
784 richard 336 
# On autorise les requêtes FTP
337 
# FTP requests are allowed
338 
modprobe ip_conntrack_ftp
339 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
340 
 
615 richard 341 
# On autorise les requêtes NTP
498 richard 342 
# NTP requests are allowed
343 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 344 
 
503 richard 345 
# On autorise les requêtes ICMP (ping)
346 
# ICMP (ping) requests are allowed
347 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 348 
 
615 richard 349 
# On autorise les requêtes LDAP si un serveur externe est configué
350 
# LDAP requests are allowed if an external server is declared
351 
if [ $LDAP = on ]
352 
	then
694 franck 353 
	$IPTABLES -A OUTPUT -p tcp -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
355 
#	$IPTABLES -A INPUT  -p tcp -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
615 richard 357 
fi
783 richard 358 
 
359 
#############################
360 
#       POSTROUTING         #
361 
#############################
498 richard 362 
# Traduction dynamique d'adresse en sortie
476 richard 363 
# Dynamic NAT on EXTIF
1 root 364 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
365 
 
476 richard 366 
# Save all rules
1 root 367 
/etc/init.d/iptables save
368 
 
476 richard 369 
# End of script
1 root 370