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872 richard 1 
#!/bin/bash
64 franck 2 
# $Id: alcasar-iptables.sh 1230 2013-10-01 07:52:22Z crox53 $
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 
 
1159 crox53 48 
#lancement du module kernel ipt_NETFLOW (module iptables)
49 
modprobe ipt_NETFLOW destination=127.0.0.1:2055
50 
 
498 richard 51 
# Effacement des règles existantes
476 richard 52 
# Flush all existing rules
1 root 53 
$IPTABLES -F
54 
$IPTABLES -t nat -F
55 
$IPTABLES -t mangle -F
56 
$IPTABLES -F INPUT
57 
$IPTABLES -F FORWARD
58 
$IPTABLES -F OUTPUT
59 
 
498 richard 60 
# Suppression des chaines utilisateurs sur les tables filter et nat
61 
# Flush non default rules on filter and nat tables
62 
$IPTABLES -X
63 
$IPTABLES -t nat -X
64 
 
65 
# Stratégies par défaut
476 richard 66 
# Default policies
1 root 67 
$IPTABLES -P INPUT DROP
68 
$IPTABLES -P FORWARD DROP
498 richard 69 
$IPTABLES -P OUTPUT DROP
1 root 70 
$IPTABLES -t nat -P PREROUTING ACCEPT
71 
$IPTABLES -t nat -P POSTROUTING ACCEPT
72 
$IPTABLES -t nat -P OUTPUT ACCEPT
73 
 
472 richard 74 
#############################
783 richard 75 
#       PREROUTING          #
472 richard 76 
#############################
783 richard 77 
# 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
1221 richard 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 "
783 richard 80 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
1 root 81 
 
783 richard 82 
# 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
84 
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
85 
# 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 "
87 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
88 
 
1072 richard 89 
# Si le filtrage DNS est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
783 richard 90 
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
91 
if [ $DNS_FILTERING = on ]; then
92 
	# Compute exception IP
93 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
94 
	if [ $nb_exceptions != "0" ]
95 
	then
96 
		while read ip_exception
97 
		do
98 
			$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
100 
	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
102 
fi
103 
 
104 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD
1221 richard 105 
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD
1230 crox53 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 "
1221 richard 107 
 
783 richard 108 
# Redirection des requêtes HTTP vers DansGuardian (proxy transparent)
109 
# Redirect HTTP requests in 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
111 
 
112 
# Redirection des requêtes NTP vers le serveur NTP local
113 
# 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
115 
 
472 richard 116 
#############################
783 richard 117 
#         INPUT             #
472 richard 118 
#############################
871 richard 119 
 
783 richard 120 
# Tout passe sur loopback
121 
# accept all on loopback
122 
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 123 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 124 
 
125 
# 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)
472 richard 127 
$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
129 
$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
675 richard 131 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
498 richard 132 
 
871 richard 133 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
134 
# Drop broadcast & multicast on EXTIF to avoid log
783 richard 135 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 136 
 
783 richard 137 
# On autorise les retours de connexions légitimes par INPUT
138 
# Conntrack on INPUT
139 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
373 richard 140 
 
1221 richard 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)
142 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
783 richard 143 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 144 
 
859 richard 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`
1221 richard 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 "
859 richard 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
783 richard 159 
# Autorisation des connexions légitimes à DansGuardian
160 
# 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
373 richard 162 
 
783 richard 163 
# 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)
165 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
791 richard 166 
 
783 richard 167 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
168 
# 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
170 
 
171 
# Accès direct aux services internes
172 
# Internal services access
786 richard 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
174 
$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
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
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
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
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
783 richard 180 
 
181 
# SSHD rules if activate
182 
if [ $SSH = on ]
520 richard 183 
	then
783 richard 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"
185 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
1063 richard 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"
1161 richard 187 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
520 richard 188 
fi
783 richard 189 
 
190 
# Insertion de règles locales
191 
# Here, we add local rules (i.e. VPN from Internet)
192 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
193 
        . /usr/local/etc/alcasar-iptables-local.sh
194 
fi
195 
 
196 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
197 
# 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 "
199 
$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
201 
 
202 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
203 
# Reject INTIF access (only when chilli is down)
204 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
205 
$IPTABLES -A INPUT -i $INTIF -j REJECT
206 
 
207 
# 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)
209 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
210 
 
871 richard 211 
 
783 richard 212 
#############################
213 
#        FORWARD            #
214 
#############################
215 
 
216 
# Rejet des requêtes DNS vers Internet
217 
# Deny forward DNS
218 
$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
220 
 
859 richard 221 
# Insertion des règles de blocage IP
1072 richard 222 
# Here, we add local IP block rules
859 richard 223 
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then
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
231 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -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
233 
		fi
234 
	done < /usr/local/etc/alcasar-ip-blocked
790 richard 235 
fi
859 richard 236 
 
1072 richard 237 
# Si le filtrage de domain est activé, blocage des IP de la BL
238 
# If DNS filter is on, reject IP of BL
1161 richard 239 
# Comment : loading time is too long and iptables should become oveloaded !!! should use "ipset" instead
1072 richard 240 
#if [ $DNS_FILTERING = on ]; then
241 
#	cd $BL_IP_CAT
242 
#	for category in `ls -1 | cut -d"@" -f1`
243 
#	do
244 
#		while read ip_blocked
245 
#		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 -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 tcp -j REJECT --reject-with tcp-reset
250 
#		done < $BL_IP_CAT/$category
251 
#	done
252 
#fi
253 
 
815 richard 254 
# Autorisation des retours de connexions légitimes
255 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 256 
 
783 richard 257 
#  If protocols filter is activate
612 richard 258 
if [ $PROTOCOLS_FILTERING = on ]; then
688 richard 259 
	# Compute exception IP (IP addresses that shouldn't be filtered)
260 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
373 richard 261 
	if [ $nb_exceptions != "0" ]
262 
	then
263 
		while read ip_exception
264 
		do
1221 richard 265 
#			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
1159 crox53 266 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j NETFLOW
373 richard 267 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
268 
		done < /usr/local/etc/alcasar-filter-exceptions
269 
	fi
871 richard 270 
	# 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 
	if [ $nb_uamallowed != "0" ]
688 richard 273 
	then
274 
		while read ip_allowed_line
275 
		do
276 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
1221 richard 277 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
1159 crox53 278 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
688 richard 279 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
280 
		done < /usr/local/etc/alcasar-uamallowed
281 
	fi
520 richard 282 
	# Autorisation des protocoles non commentés
476 richard 283 
	# Allow non comment protocols
373 richard 284 
	while read svc_line
285 
	do
286 
		svc_on=`echo $svc_line|cut -b1`
287 
		if [ $svc_on != "#" ]
288 
		then
289 
			svc_name=`echo $svc_line|cut -d" " -f1`
290 
			svc_port=`echo $svc_line|cut -d" " -f2`
291 
			if [ $svc_name = "icmp" ]
292 
			then
1159 crox53 293 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
859 richard 294 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
373 richard 295 
			else
1159 crox53 296 
 
1221 richard 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 "
1159 crox53 298 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
859 richard 299 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
1221 richard 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 "
1159 crox53 301 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
859 richard 302 
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
373 richard 303 
			fi
304 
		fi
305 
	done < /usr/local/etc/alcasar-services
783 richard 306 
	# Rejet explicite des autres protocoles
307 
	# reject the others protocols
1221 richard 308 
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
373 richard 309 
	$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 icmp -j REJECT
1 root 312 
fi
492 franck 313 
 
314 
#  If QOS is activate  #
612 richard 315 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
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	. /usr/local/etc/alcasar-iptables-qos.sh
317 
fi
318 
 
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# Autorisation des connections sortant du LAN
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# Allow forward connections with log
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#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
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$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
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$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
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#############################
326 
#         OUTPUT            #
327 
#############################
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# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
329 
# Everything is allowed but traffic through outside network interface
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$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
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# On autorise les requêtes DNS vers les serveurs DNS identifiés
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# Allow DNS requests to identified DNS servers
334 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
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615 richard 336 
# On autorise les requêtes HTTP sortantes
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# HTTP requests are allowed
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$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
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$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 340 
 
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# On autorise les requêtes FTP
342 
# FTP requests are allowed
343 
modprobe ip_conntrack_ftp
344 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
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$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
784 richard 346 
 
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# On autorise les requêtes NTP
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# NTP requests are allowed
349 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 350 
 
503 richard 351 
# On autorise les requêtes ICMP (ping)
352 
# ICMP (ping) requests are allowed
353 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 354 
 
615 richard 355 
# On autorise les requêtes LDAP si un serveur externe est configué
356 
# LDAP requests are allowed if an external server is declared
357 
if [ $LDAP = on ]
358 
	then
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	$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 $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
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fi
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783 richard 364 
#############################
365 
#       POSTROUTING         #
366 
#############################
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# Traduction dynamique d'adresse en sortie
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# Dynamic NAT on EXTIF
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$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
370 
 
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# Save all rules
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/etc/init.d/iptables save
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# End of script
1 root 375