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675 richard 1 
#!/bin/sh
64 franck 2 
# $Id: alcasar-iptables.sh 791 2012-01-13 21:31:36Z 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
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}
790 richard 30 
EXT_LAN_FILTERING=`grep EXT_LAN_FILTERING= $conf_file|cut -d"=" -f2`	# filter acces to the lan on alcasar/eth0 (on/off)
31 
EXT_LAN_FILTERING=${EXT_LAN_FILTERING:=off}
766 richard 32 
DNS_FILTERING=`grep DNS_FILTERING= $conf_file|cut -d"=" -f2`		# DNS and URLs filter (on/off)
615 richard 33 
DNS_FILTERING=${DNS_FILTERING:=off}
783 richard 34 
QOS=`grep QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
615 richard 35 
QOS=${QOS:=off}
783 richard 36 
SSH=`grep SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
615 richard 37 
SSH=${SSH:=off}
783 richard 38 
Admin_from_IP=${Admin_from_IP:="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= $conf_file|cut -d"=" -f2`				# LDAP external server active (on/off)
615 richard 40 
LDAP=${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 
 
86 
# Si le filtrage est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions
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 
#############################
783 richard 115 
# Tout passe sur loopback
116 
# accept all on loopback
117 
$IPTABLES -A INPUT -i lo -j ACCEPT
118 
 
119 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
120 
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
472 richard 121 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
122 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
123 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
124 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
675 richard 125 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
498 richard 126 
 
783 richard 127 
# On rejète les trame en broadcast et en multicast sur EXTIF (pour ne pas les journaliser)
128 
# Drop broadcast & multicast on EXTIF to not be logged
129 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 130 
 
783 richard 131 
# On autorise les retours de connexions légitimes par INPUT
132 
# Conntrack on INPUT
133 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
373 richard 134 
 
783 richard 135 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
136 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked in mangle table (PREROUTING)
137 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 138 
 
139 
# Filtrage de l'accès au LAN connecté sur EXTIF (eth0)
140 
# EXTIF (eth0) connected LAN filtering
141 
if [ $EXT_LAN_FILTERING = on ]; then
142 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $public_ip_mask -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
143 
else
783 richard 144 
# Autorisation des connexions légitimes à DansGuardian
145 
# Allow connections for DansGuardian
146 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
791 richard 147 
fi
373 richard 148 
 
783 richard 149 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
150 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
151 
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
791 richard 152 
 
783 richard 153 
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
154 
# Allow connections for DNSMASQ (with blackhole)
155 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
156 
 
157 
# Accès direct aux services internes
158 
# Internal services access
786 richard 159 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
160 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
161 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
162 
$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
163 
$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
164 
$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
165 
$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 166 
 
167 
# SSHD rules if activate
168 
if [ $SSH = on ]
520 richard 169 
	then
783 richard 170 
	$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"
171 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
172 
	$IPTABLES -A INPUT -i $EXTIF -s $Admin_from_IP -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW --syn -j ULOG --ulog-nlgroup 2 --ulog-prefix "RULE ssh-from-WAN -- ACCEPT"
173 
	$IPTABLES -A INPUT -i $EXTIF -s $Admin_from_IP -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW,ESTABLISHED -j ACCEPT
520 richard 174 
fi
783 richard 175 
 
176 
# Insertion de règles locales
177 
# Here, we add local rules (i.e. VPN from Internet)
178 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
179 
        . /usr/local/etc/alcasar-iptables-local.sh
180 
fi
181 
 
182 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
183 
# Deny and log on INPUT from the LAN
184 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
185 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
186 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
187 
 
188 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
189 
# Reject INTIF access (only when chilli is down)
190 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
191 
$IPTABLES -A INPUT -i $INTIF -j REJECT
192 
 
193 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
194 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
195 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
196 
 
197 
#############################
198 
#        FORWARD            #
199 
#############################
200 
 
201 
# Rejet des requêtes DNS vers Internet
202 
# Deny forward DNS
203 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
204 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
205 
 
790 richard 206 
# Filtrage de l'accès au LAN connecté sur EXTIF (eth0)
207 
# EXTIF (eth0) connected LAN filtering
208 
if [ $EXT_LAN_FILTERING = on ]; then
209 
$IPTABLES -A FORWARD -i $TUNIF -p udp -d $public_ip_mask -j REJECT --reject-with icmp-port-unreachable
210 
$IPTABLES -A FORWARD -i $TUNIF -p icmp -d $public_ip_mask -j REJECT --reject-with icmp-port-unreachable
211 
$IPTABLES -A FORWARD -i $TUNIF -p tcp -d $public_ip_mask -j REJECT --reject-with tcp-reset
212 
fi
213 
 
783 richard 214 
#  If protocols filter is activate
612 richard 215 
if [ $PROTOCOLS_FILTERING = on ]; then
688 richard 216 
	# Compute exception IP (IP addresses that shouldn't be filtered)
217 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
373 richard 218 
	if [ $nb_exceptions != "0" ]
219 
	then
220 
		while read ip_exception
221 
		do
222 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
223 
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
224 
		done < /usr/local/etc/alcasar-filter-exceptions
225 
	fi
688 richard 226 
	# Compute uamallowed IP (IP address of equipments connect between ALCASAR and Internet (DMZ, own servers, ...)
227 
	nb_exceptions=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
228 
	if [ $nb_exceptions != "0" ]
229 
	then
230 
		while read ip_allowed_line
231 
		do
232 
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
233 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
234 
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
235 
		done < /usr/local/etc/alcasar-uamallowed
236 
	fi
520 richard 237 
	# Autorisation des protocoles non commentés
476 richard 238 
	# Allow non comment protocols
373 richard 239 
	while read svc_line
240 
	do
241 
		svc_on=`echo $svc_line|cut -b1`
242 
		if [ $svc_on != "#" ]
243 
		then
244 
			svc_name=`echo $svc_line|cut -d" " -f1`
245 
			svc_port=`echo $svc_line|cut -d" " -f2`
246 
			if [ $svc_name = "icmp" ]
247 
			then
248 
				$IPTABLES -A FORWARD -i $TUNIF -p icmp -j ACCEPT
249 
			else
783 richard 250 
				$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_TCP-$svc_name -- ACCEPT "
373 richard 251 
				$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
783 richard 252 
				$IPTABLES -A FORWARD -i $TUNIF -p udp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_UDP-$svc_name -- ACCEPT "
253 
				$IPTABLES -A FORWARD -i $TUNIF -p udp --dport $svc_port -m state --state NEW -j ACCEPT
373 richard 254 
			fi
255 
		fi
256 
	done < /usr/local/etc/alcasar-services
783 richard 257 
	# Rejet explicite des autres protocoles
258 
	# reject the others protocols
259 
	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
373 richard 260 
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
261 
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
262 
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
1 root 263 
fi
791 richard 264 
# Autorisation des retours de connexions légitimes
265 
# Allow conntrack
266 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
492 franck 267 
 
268 
#  If QOS is activate  #
612 richard 269 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
492 franck 270 
	. /usr/local/etc/alcasar-iptables-qos.sh
271 
fi
272 
 
498 richard 273 
# Autorisation des connections sortant du LAN
476 richard 274 
# Allow forward connections with log
275 
$IPTABLES -A FORWARD -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
411 richard 276 
$IPTABLES -A FORWARD -i $TUNIF -m state --state NEW -j ACCEPT
1 root 277 
 
783 richard 278 
#############################
279 
#         OUTPUT            #
280 
#############################
604 richard 281 
# SSHD rules if activate
612 richard 282 
if [ $SSH = on ]
604 richard 283 
	then
284 
	$IPTABLES -A OUTPUT -o $EXTIF -p tcp --sport ssh -m state --state ESTABLISHED -j ACCEPT
285 
fi
498 richard 286 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
287 
# Everything is allowed but traffic through outside network interface
288 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 289 
 
503 richard 290 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
498 richard 291 
# Allow DNS requests to identified DNS servers
292 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 293 
 
615 richard 294 
# On autorise les requêtes HTTP sortantes
498 richard 295 
# HTTP requests are allowed
296 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 297 
 
784 richard 298 
# On autorise les requêtes FTP
299 
# FTP requests are allowed
300 
modprobe ip_conntrack_ftp
301 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
302 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
303 
 
615 richard 304 
# On autorise les requêtes NTP
498 richard 305 
# NTP requests are allowed
306 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 307 
 
503 richard 308 
# On autorise les requêtes ICMP (ping)
309 
# ICMP (ping) requests are allowed
310 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 311 
 
615 richard 312 
# On autorise les requêtes LDAP si un serveur externe est configué
313 
# LDAP requests are allowed if an external server is declared
314 
if [ $LDAP = on ]
315 
	then
694 franck 316 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
317 
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
318 
#	$IPTABLES -A INPUT  -p tcp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
319 
#	$IPTABLES -A INPUT  -p udp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
615 richard 320 
fi
783 richard 321 
 
322 
 
323 
#############################
324 
#       POSTROUTING         #
325 
#############################
498 richard 326 
# Traduction dynamique d'adresse en sortie
476 richard 327 
# Dynamic NAT on EXTIF
1 root 328 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
329 
 
476 richard 330 
# Save all rules
1 root 331 
/etc/init.d/iptables save
332 
 
476 richard 333 
# End of script
1 root 334