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872 richard 1 
#!/bin/bash
64 franck 2 
# $Id: alcasar-iptables.sh 1291 2014-01-10 17:49:15Z richard $
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
1221 richard 8 
# There are four channels for log :
9 
#	1 tracability with The 'Netflow' kernel module (iptables target = NETFLOW);
10 
#	2 protection of ALCASAR with the Ulog group 1 (default group)
11 
#	3 SSH with the ulog group 2;
12 
#	4 extern access attempts with the ulog group 3.
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 
 
1291 richard 48 
 
49 
# loading of NetFlow probe (ipt_NETFLOW kernel module)
1159 crox53 50 
modprobe ipt_NETFLOW destination=127.0.0.1:2055
51 
 
498 richard 52 
# Effacement des règles existantes
476 richard 53 
# Flush all existing rules
1 root 54 
$IPTABLES -F
55 
$IPTABLES -t nat -F
56 
$IPTABLES -t mangle -F
57 
$IPTABLES -F INPUT
58 
$IPTABLES -F FORWARD
59 
$IPTABLES -F OUTPUT
60 
 
498 richard 61 
# Suppression des chaines utilisateurs sur les tables filter et nat
62 
# Flush non default rules on filter and nat tables
63 
$IPTABLES -X
64 
$IPTABLES -t nat -X
65 
 
66 
# Stratégies par défaut
476 richard 67 
# Default policies
1 root 68 
$IPTABLES -P INPUT DROP
69 
$IPTABLES -P FORWARD DROP
498 richard 70 
$IPTABLES -P OUTPUT DROP
1 root 71 
$IPTABLES -t nat -P PREROUTING ACCEPT
72 
$IPTABLES -t nat -P POSTROUTING ACCEPT
73 
$IPTABLES -t nat -P OUTPUT ACCEPT
74 
 
1291 richard 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 
 
472 richard 95 
#############################
783 richard 96 
#       PREROUTING          #
472 richard 97 
#############################
783 richard 98 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
99 
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
1221 richard 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 "
783 richard 101 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
1 root 102 
 
783 richard 103 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
104 
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
105 
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
106 
# Remark : this port is only open when filtering is on
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 "
108 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
109 
 
1072 richard 110 
# Si le filtrage DNS est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
783 richard 111 
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
112 
if [ $DNS_FILTERING = on ]; then
113 
	# Compute exception IP
114 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
115 
	if [ $nb_exceptions != "0" ]
116 
	then
117 
		while read ip_exception
118 
		do
119 
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
120 
		done < /usr/local/etc/alcasar-filter-exceptions
121 
	fi
122 
		$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
123 
fi
1291 richard 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
783 richard 127 
 
1291 richard 128 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
129 
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
1230 crox53 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 "
1221 richard 131 
 
1291 richard 132 
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent)
133 
# Redirect outbound HTTP requests to DansGuardian (transparent proxy)
783 richard 134 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
135 
 
136 
# Redirection des requêtes NTP vers le serveur NTP local
137 
# Redirect NTP request in local NTP server
138 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
139 
 
472 richard 140 
#############################
783 richard 141 
#         INPUT             #
472 richard 142 
#############################
871 richard 143 
 
783 richard 144 
# Tout passe sur loopback
145 
# accept all on loopback
146 
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 147 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 148 
 
149 
# Rejet des demandes de connexions non conformes (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)
472 richard 151 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
152 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
153 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
154 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
675 richard 155 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
498 richard 156 
 
871 richard 157 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
158 
# Drop broadcast & multicast on EXTIF to avoid log
783 richard 159 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 160 
 
783 richard 161 
# On autorise les retours de connexions légitimes par INPUT
162 
# Conntrack on INPUT
163 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
373 richard 164 
 
1221 richard 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)
166 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
783 richard 167 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 168 
 
783 richard 169 
# Autorisation des connexions légitimes à DansGuardian
170 
# Allow connections for DansGuardian
171 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
373 richard 172 
 
783 richard 173 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
174 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
175 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
791 richard 176 
 
783 richard 177 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
178 
# Allow connections for DNSMASQ (with blackhole)
179 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
180 
 
181 
# Accès direct aux services internes
182 
# Internal services access
786 richard 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
184 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
185 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
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
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
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
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
783 richard 190 
 
191 
# SSHD rules if activate
192 
if [ $SSH = on ]
520 richard 193 
	then
783 richard 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"
195 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
1063 richard 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"
1161 richard 197 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
520 richard 198 
fi
783 richard 199 
 
200 
# Insertion de règles locales
201 
# Here, we add local rules (i.e. VPN from Internet)
202 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
203 
        . /usr/local/etc/alcasar-iptables-local.sh
204 
fi
205 
 
206 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
207 
# Deny and log on INPUT from the LAN
208 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
209 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
210 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
211 
 
212 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
213 
# Reject INTIF access (only when chilli is down)
214 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
215 
$IPTABLES -A INPUT -i $INTIF -j REJECT
216 
 
217 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
218 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
219 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
220 
 
871 richard 221 
 
783 richard 222 
#############################
223 
#        FORWARD            #
224 
#############################
225 
 
226 
# Rejet des requêtes DNS vers Internet
227 
# Deny forward DNS
228 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
229 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
230 
 
1291 richard 231 
# Blocage des IPs du SET alcasar_ip_blocked
232 
# Deny IPs of the SET alcasar_ip_blocked
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
234 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p udp -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
236 
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset
859 richard 237 
 
1072 richard 238 
# Si le filtrage de domain est activé, blocage des IP de la BL
239 
# If DNS filter is on, reject IP of BL
1161 richard 240 
# Comment : loading time is too long and iptables should become oveloaded !!! should use "ipset" instead
1072 richard 241 
#if [ $DNS_FILTERING = on ]; then
242 
#	cd $BL_IP_CAT
243 
#	for category in `ls -1 | cut -d"@" -f1`
244 
#	do
245 
#		while read ip_blocked
246 
#		do
247 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
248 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p udp -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
250 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
251 
#		done < $BL_IP_CAT/$category
252 
#	done
253 
#fi
254 
 
815 richard 255 
# Autorisation des retours de connexions légitimes
256 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 257 
 
783 richard 258 
#  If protocols filter is activate
612 richard 259 
if [ $PROTOCOLS_FILTERING = on ]; then
688 richard 260 
	# Compute exception IP (IP addresses that shouldn't be filtered)
261 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
373 richard 262 
	if [ $nb_exceptions != "0" ]
263 
	then
264 
		while read ip_exception
265 
		do
1221 richard 266 
#			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
1159 crox53 267 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j NETFLOW
373 richard 268 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
269 
		done < /usr/local/etc/alcasar-filter-exceptions
270 
	fi
871 richard 271 
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
272 
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
273 
	if [ $nb_uamallowed != "0" ]
688 richard 274 
	then
275 
		while read ip_allowed_line
276 
		do
277 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
1221 richard 278 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
1159 crox53 279 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
688 richard 280 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
281 
		done < /usr/local/etc/alcasar-uamallowed
282 
	fi
520 richard 283 
	# Autorisation des protocoles non commentés
476 richard 284 
	# Allow non comment protocols
373 richard 285 
	while read svc_line
286 
	do
287 
		svc_on=`echo $svc_line|cut -b1`
288 
		if [ $svc_on != "#" ]
289 
		then
290 
			svc_name=`echo $svc_line|cut -d" " -f1`
291 
			svc_port=`echo $svc_line|cut -d" " -f2`
292 
			if [ $svc_name = "icmp" ]
293 
			then
1159 crox53 294 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
859 richard 295 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
373 richard 296 
			else
1159 crox53 297 
 
1221 richard 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 "
1159 crox53 299 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
859 richard 300 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
1221 richard 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 "
1159 crox53 302 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
859 richard 303 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
373 richard 304 
			fi
305 
		fi
306 
	done < /usr/local/etc/alcasar-services
783 richard 307 
	# Rejet explicite des autres protocoles
308 
	# reject the others protocols
1221 richard 309 
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
373 richard 310 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
311 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
312 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
1 root 313 
fi
492 franck 314 
 
315 
#  If QOS is activate  #
612 richard 316 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
492 franck 317 
	. /usr/local/etc/alcasar-iptables-qos.sh
318 
fi
319 
 
498 richard 320 
# Autorisation des connections sortant du LAN
476 richard 321 
# Allow forward connections with log
1221 richard 322 
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
1159 crox53 323 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
859 richard 324 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
1 root 325 
 
783 richard 326 
#############################
327 
#         OUTPUT            #
328 
#############################
1159 crox53 329 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
330 
# Everything is allowed but traffic through outside network interface
498 richard 331 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 332 
 
503 richard 333 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
498 richard 334 
# Allow DNS requests to identified DNS servers
335 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 336 
 
615 richard 337 
# On autorise les requêtes HTTP sortantes
498 richard 338 
# HTTP requests are allowed
1159 crox53 339 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
498 richard 340 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 341 
 
784 richard 342 
# On autorise les requêtes FTP
343 
# FTP requests are allowed
344 
modprobe ip_conntrack_ftp
345 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
1159 crox53 346 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
784 richard 347 
 
615 richard 348 
# On autorise les requêtes NTP
498 richard 349 
# NTP requests are allowed
350 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 351 
 
503 richard 352 
# On autorise les requêtes ICMP (ping)
353 
# ICMP (ping) requests are allowed
354 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 355 
 
615 richard 356 
# On autorise les requêtes LDAP si un serveur externe est configué
357 
# LDAP requests are allowed if an external server is declared
358 
if [ $LDAP = on ]
359 
	then
694 franck 360 
	$IPTABLES -A OUTPUT -p tcp -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
615 richard 362 
fi
783 richard 363 
 
1159 crox53 364 
 
783 richard 365 
#############################
366 
#       POSTROUTING         #
367 
#############################
498 richard 368 
# Traduction dynamique d'adresse en sortie
476 richard 369 
# Dynamic NAT on EXTIF
1 root 370 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
371 
 
476 richard 372 
# Save all rules
1 root 373 
/etc/init.d/iptables save
374 
 
476 richard 375 
# End of script
1 root 376