Subversion Repositories ALCASAR

Rev

Rev 1230 | Rev 1294 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log

Rev Author Line No. Line
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