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675 richard 1
#!/bin/sh
64 franck 2
# $Id: alcasar-iptables.sh 815 2012-02-08 20:49:07Z 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
 
810 franck 119
# Insertion de règles de blocage (Devel)
120
# Here, we add block rules (Devel)
121
if [ -f /usr/local/etc/alcasar-iptables-block.sh ]; then
122
        . /usr/local/etc/alcasar-iptables-block.sh
123
fi
124
 
783 richard 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
 
810 franck 133
# On rejette les trame en broadcast et en multicast sur EXTIF (pour ne pas les journaliser)
783 richard 134
# Drop broadcast & multicast on EXTIF to not be logged 
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
 
783 richard 141
# 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)
143
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 144
 
145
# Filtrage de l'accès au LAN connecté sur EXTIF (eth0)
146
# EXTIF (eth0) connected LAN filtering
147
if [ $EXT_LAN_FILTERING = on ]; then
148
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $public_ip_mask -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
149
else
783 richard 150
# Autorisation des connexions légitimes à DansGuardian 
151
# Allow connections for DansGuardian
152
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
791 richard 153
fi
373 richard 154
 
783 richard 155
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
156
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
157
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
791 richard 158
 
783 richard 159
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
160
# Allow connections for DNSMASQ (with blackhole)
161
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
162
 
163
# Accès direct aux services internes
164
# Internal services access
786 richard 165
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
166
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
167
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
168
$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
169
$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
170
$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
171
$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 172
 
173
# SSHD rules if activate 
174
if [ $SSH = on ]
520 richard 175
	then
783 richard 176
	$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"
177
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
178
	$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"
179
	$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 180
fi
783 richard 181
 
182
# Insertion de règles locales
183
# Here, we add local rules (i.e. VPN from Internet)
184
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
185
        . /usr/local/etc/alcasar-iptables-local.sh
186
fi
187
 
188
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
189
# Deny and log on INPUT from the LAN
190
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
191
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
192
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
193
 
194
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
195
# Reject INTIF access (only when chilli is down)
196
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
197
$IPTABLES -A INPUT -i $INTIF -j REJECT
198
 
199
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
200
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
201
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
202
 
203
#############################
204
#        FORWARD            #
205
#############################
206
 
207
# Rejet des requêtes DNS vers Internet
208
# Deny forward DNS
209
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
210
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
211
 
790 richard 212
# Filtrage de l'accès au LAN connecté sur EXTIF (eth0)
213
# EXTIF (eth0) connected LAN filtering
214
if [ $EXT_LAN_FILTERING = on ]; then
215
$IPTABLES -A FORWARD -i $TUNIF -p udp -d $public_ip_mask -j REJECT --reject-with icmp-port-unreachable
216
$IPTABLES -A FORWARD -i $TUNIF -p icmp -d $public_ip_mask -j REJECT --reject-with icmp-port-unreachable
217
$IPTABLES -A FORWARD -i $TUNIF -p tcp -d $public_ip_mask -j REJECT --reject-with tcp-reset
218
fi
815 richard 219
# Autorisation des retours de connexions légitimes
220
# Allow conntrack
221
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 222
 
783 richard 223
#  If protocols filter is activate 
612 richard 224
if [ $PROTOCOLS_FILTERING = on ]; then
688 richard 225
	# Compute exception IP (IP addresses that shouldn't be filtered)
226
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
373 richard 227
	if [ $nb_exceptions != "0" ]
228
	then
229
		while read ip_exception 
230
		do
231
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
232
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
233
		done < /usr/local/etc/alcasar-filter-exceptions
234
	fi
688 richard 235
	# Compute uamallowed IP (IP address of equipments connect between ALCASAR and Internet (DMZ, own servers, ...) 
236
	nb_exceptions=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
237
	if [ $nb_exceptions != "0" ]
238
	then
239
		while read ip_allowed_line 
240
		do
241
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
242
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
243
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
244
		done < /usr/local/etc/alcasar-uamallowed
245
	fi
520 richard 246
	# Autorisation des protocoles non commentés
476 richard 247
	# Allow non comment protocols
373 richard 248
	while read svc_line
249
	do
250
		svc_on=`echo $svc_line|cut -b1`
251
		if [ $svc_on != "#" ]
252
		then	
253
			svc_name=`echo $svc_line|cut -d" " -f1`
254
			svc_port=`echo $svc_line|cut -d" " -f2`
255
			if [ $svc_name = "icmp" ]
256
			then
257
				$IPTABLES -A FORWARD -i $TUNIF -p icmp -j ACCEPT 
258
			else
783 richard 259
				$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 260
				$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
783 richard 261
				$IPTABLES -A FORWARD -i $TUNIF -p udp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_UDP-$svc_name -- ACCEPT "
262
				$IPTABLES -A FORWARD -i $TUNIF -p udp --dport $svc_port -m state --state NEW -j ACCEPT
373 richard 263
			fi
264
		fi
265
	done < /usr/local/etc/alcasar-services
783 richard 266
	# Rejet explicite des autres protocoles
267
	# reject the others protocols
268
	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
373 richard 269
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
270
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
271
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT 
1 root 272
fi
492 franck 273
 
274
#  If QOS is activate  #
612 richard 275
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
492 franck 276
	. /usr/local/etc/alcasar-iptables-qos.sh 	
277
fi
278
 
498 richard 279
# Autorisation des connections sortant du LAN  
476 richard 280
# Allow forward connections with log
281
$IPTABLES -A FORWARD -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
411 richard 282
$IPTABLES -A FORWARD -i $TUNIF -m state --state NEW -j ACCEPT
1 root 283
 
783 richard 284
#############################
285
#         OUTPUT            #
286
#############################
604 richard 287
# SSHD rules if activate 
612 richard 288
if [ $SSH = on ]
604 richard 289
	then
290
	$IPTABLES -A OUTPUT -o $EXTIF -p tcp --sport ssh -m state --state ESTABLISHED -j ACCEPT
291
fi
498 richard 292
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
293
# Everything is allowed but traffic through outside network interface
294
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 295
 
503 richard 296
# On autorise les requêtes DNS vers les serveurs DNS identifiés 
498 richard 297
# Allow DNS requests to identified DNS servers
298
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 299
 
615 richard 300
# On autorise les requêtes HTTP sortantes
498 richard 301
# HTTP requests are allowed
302
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 303
 
784 richard 304
# On autorise les requêtes FTP 
305
# FTP requests are allowed
306
modprobe ip_conntrack_ftp
307
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
308
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
309
 
615 richard 310
# On autorise les requêtes NTP 
498 richard 311
# NTP requests are allowed
312
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 313
 
503 richard 314
# On autorise les requêtes ICMP (ping) 
315
# ICMP (ping) requests are allowed
316
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 317
 
615 richard 318
# On autorise les requêtes LDAP si un serveur externe est configué
319
# LDAP requests are allowed if an external server is declared
320
if [ $LDAP = on ]
321
	then
694 franck 322
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
323
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
324
#	$IPTABLES -A INPUT  -p tcp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
325
#	$IPTABLES -A INPUT  -p udp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
615 richard 326
fi
783 richard 327
 
328
 
329
#############################
330
#       POSTROUTING         #
331
#############################
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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
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# Save all rules
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/etc/init.d/iptables save
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# End of script
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