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872 richard 1
#!/bin/bash
64 franck 2
# $Id: alcasar-iptables.sh 1056 2013-03-26 21:46:36Z 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}
783 richard 32
QOS=`grep QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
615 richard 33
QOS=${QOS:=off}
783 richard 34
SSH=`grep SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
615 richard 35
SSH=${SSH:=off}
783 richard 36
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)
37
LDAP=`grep LDAP= $conf_file|cut -d"=" -f2`				# LDAP external server active (on/off)
615 richard 38
LDAP=${LDAP:=off}
783 richard 39
LDAP_IP=`grep LDAP_IP= $conf_file|cut -d"=" -f2`			# WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
768 richard 40
LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
675 richard 41
EXTIF="eth0"
1 root 42
INTIF="eth1"
783 richard 43
TUNIF="tun0"								# listen device for chilli daemon
612 richard 44
IPTABLES="/sbin/iptables"
1 root 45
 
498 richard 46
# Effacement des règles existantes
476 richard 47
# Flush all existing rules
1 root 48
$IPTABLES -F
49
$IPTABLES -t nat -F
50
$IPTABLES -t mangle -F
51
$IPTABLES -F INPUT
52
$IPTABLES -F FORWARD
53
$IPTABLES -F OUTPUT
54
 
498 richard 55
# Suppression des chaines utilisateurs sur les tables filter et nat
56
# Flush non default rules on filter and nat tables
57
$IPTABLES -X
58
$IPTABLES -t nat -X
59
 
60
# Stratégies par défaut
476 richard 61
# Default policies
1 root 62
$IPTABLES -P INPUT DROP
63
$IPTABLES -P FORWARD DROP
498 richard 64
$IPTABLES -P OUTPUT DROP
1 root 65
$IPTABLES -t nat -P PREROUTING ACCEPT
66
$IPTABLES -t nat -P POSTROUTING ACCEPT
67
$IPTABLES -t nat -P OUTPUT ACCEPT
68
 
472 richard 69
#############################
783 richard 70
#       PREROUTING          #
472 richard 71
#############################
783 richard 72
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
73
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
74
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j ULOG --ulog-prefix "RULE direct-proxy -- DENY "
75
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
1 root 76
 
783 richard 77
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
78
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
79
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
80
# Remark : this port is only open when filtering is on
81
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "
82
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
83
 
84
# Si le filtrage est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions 
85
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
86
if [ $DNS_FILTERING = on ]; then
87
	# Compute exception IP
88
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
89
	if [ $nb_exceptions != "0" ]
90
	then
91
		while read ip_exception 
92
		do
93
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
94
		done < /usr/local/etc/alcasar-filter-exceptions
95
	fi
96
		$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
97
fi
98
 
99
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD
100
# Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD
101
$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 "
102
# Redirection des requêtes HTTP vers DansGuardian (proxy transparent)
103
# Redirect HTTP requests in DansGuardian (transparent proxy)
104
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
105
 
106
# Redirection des requêtes NTP vers le serveur NTP local
107
# Redirect NTP request in local NTP server
108
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
109
 
472 richard 110
#############################
783 richard 111
#         INPUT             #
472 richard 112
#############################
871 richard 113
 
783 richard 114
# Tout passe sur loopback
115
# accept all on loopback
116
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 117
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 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
 
871 richard 127
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
128
# Drop broadcast & multicast on EXTIF to avoid log 
783 richard 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
 
859 richard 139
# Insertion des règles de blocage IP
140
# Here, we add IP block rules 
141
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then 
142
	while read ip_line
143
	do
144
		ip_on=`echo $ip_line|cut -b1`
145
		if [ $ip_on != "#" ]
146
		then	
147
			ip_blocked=`echo $ip_line|cut -d" " -f1`
148
			$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 "
149
			$IPTABLES -A INPUT -i $TUNIF -d $ip_blocked -p tcp --dport 8080 -m state --state NEW --syn -j REJECT 
150
		fi
151
	done < /usr/local/etc/alcasar-ip-blocked
152
fi
783 richard 153
# Autorisation des connexions légitimes à DansGuardian 
154
# Allow connections for DansGuardian
155
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
373 richard 156
 
783 richard 157
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
158
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
159
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
791 richard 160
 
783 richard 161
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
162
# Allow connections for DNSMASQ (with blackhole)
163
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
164
 
165
# Accès direct aux services internes
166
# Internal services access
786 richard 167
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
168
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
169
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
170
$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
171
$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
172
$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
173
$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 174
 
175
# SSHD rules if activate 
176
if [ $SSH = on ]
520 richard 177
	then
783 richard 178
	$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"
179
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
180
	$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"
181
	$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 182
fi
783 richard 183
 
184
# Insertion de règles locales
185
# Here, we add local rules (i.e. VPN from Internet)
186
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
187
        . /usr/local/etc/alcasar-iptables-local.sh
188
fi
189
 
190
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
191
# Deny and log on INPUT from the LAN
192
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
193
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
194
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
195
 
196
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
197
# Reject INTIF access (only when chilli is down)
198
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
199
$IPTABLES -A INPUT -i $INTIF -j REJECT
200
 
201
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
202
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
203
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
204
 
871 richard 205
 
783 richard 206
#############################
207
#        FORWARD            #
208
#############################
209
 
210
# Rejet des requêtes DNS vers Internet
211
# Deny forward DNS
212
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
213
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
214
 
859 richard 215
# Insertion des règles de blocage IP
216
# Here, we add IP block rules 
217
if [ -s /usr/local/etc/alcasar-ip-blocked ]; then 
218
	while read ip_line
219
	do
220
		ip_on=`echo $ip_line|cut -b1`
221
		if [ $ip_on != "#" ]
222
		then	
223
			ip_blocked=`echo $ip_line|cut -d" " -f1`
224
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -j ULOG --ulog-prefix "RULE IP-blocked -- REJECT "
225
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p udp -j REJECT --reject-with icmp-port-unreachable
226
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p icmp -j REJECT --reject-with icmp-port-unreachable
227
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_blocked -p tcp -j REJECT --reject-with tcp-reset
228
		fi
229
	done < /usr/local/etc/alcasar-ip-blocked
790 richard 230
fi
859 richard 231
 
815 richard 232
# Autorisation des retours de connexions légitimes
233
# Allow conntrack
234
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 235
 
783 richard 236
#  If protocols filter is activate 
612 richard 237
if [ $PROTOCOLS_FILTERING = on ]; then
688 richard 238
	# Compute exception IP (IP addresses that shouldn't be filtered)
239
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
373 richard 240
	if [ $nb_exceptions != "0" ]
241
	then
242
		while read ip_exception 
243
		do
244
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
245
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
246
		done < /usr/local/etc/alcasar-filter-exceptions
247
	fi
871 richard 248
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...) 
249
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
250
	if [ $nb_uamallowed != "0" ]
688 richard 251
	then
252
		while read ip_allowed_line 
253
		do
254
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
255
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
256
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
257
		done < /usr/local/etc/alcasar-uamallowed
258
	fi
520 richard 259
	# Autorisation des protocoles non commentés
476 richard 260
	# Allow non comment protocols
373 richard 261
	while read svc_line
262
	do
263
		svc_on=`echo $svc_line|cut -b1`
264
		if [ $svc_on != "#" ]
265
		then	
266
			svc_name=`echo $svc_line|cut -d" " -f1`
267
			svc_port=`echo $svc_line|cut -d" " -f2`
268
			if [ $svc_name = "icmp" ]
269
			then
859 richard 270
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT 
373 richard 271
			else
859 richard 272
				$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 "
273
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
274
				$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 "
275
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
373 richard 276
			fi
277
		fi
278
	done < /usr/local/etc/alcasar-services
783 richard 279
	# Rejet explicite des autres protocoles
280
	# reject the others protocols
281
	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
373 richard 282
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
283
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
284
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT 
1 root 285
fi
492 franck 286
 
287
#  If QOS is activate  #
612 richard 288
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
492 franck 289
	. /usr/local/etc/alcasar-iptables-qos.sh 	
290
fi
291
 
498 richard 292
# Autorisation des connections sortant du LAN  
476 richard 293
# Allow forward connections with log
859 richard 294
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
295
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
1 root 296
 
783 richard 297
#############################
298
#         OUTPUT            #
299
#############################
604 richard 300
# SSHD rules if activate 
612 richard 301
if [ $SSH = on ]
604 richard 302
	then
303
	$IPTABLES -A OUTPUT -o $EXTIF -p tcp --sport ssh -m state --state ESTABLISHED -j ACCEPT
304
fi
498 richard 305
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
306
# Everything is allowed but traffic through outside network interface
307
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 308
 
503 richard 309
# On autorise les requêtes DNS vers les serveurs DNS identifiés 
498 richard 310
# Allow DNS requests to identified DNS servers
311
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 312
 
615 richard 313
# On autorise les requêtes HTTP sortantes
498 richard 314
# HTTP requests are allowed
315
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 316
 
784 richard 317
# On autorise les requêtes FTP 
318
# FTP requests are allowed
319
modprobe ip_conntrack_ftp
320
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
321
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
322
 
615 richard 323
# On autorise les requêtes NTP 
498 richard 324
# NTP requests are allowed
325
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 326
 
503 richard 327
# On autorise les requêtes ICMP (ping) 
328
# ICMP (ping) requests are allowed
329
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 330
 
615 richard 331
# On autorise les requêtes LDAP si un serveur externe est configué
332
# LDAP requests are allowed if an external server is declared
333
if [ $LDAP = on ]
334
	then
694 franck 335
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
336
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
337
#	$IPTABLES -A INPUT  -p tcp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
338
#	$IPTABLES -A INPUT  -p udp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT
615 richard 339
fi
783 richard 340
 
341
 
342
#############################
343
#       POSTROUTING         #
344
#############################
498 richard 345
# Traduction dynamique d'adresse en sortie
476 richard 346
# Dynamic NAT on EXTIF
1 root 347
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
348
 
476 richard 349
# Save all rules
1 root 350
/etc/init.d/iptables save
351
 
476 richard 352
# End of script
1 root 353