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872 richard 1
#!/bin/bash
64 franck 2
# $Id: alcasar-iptables.sh 1332 2014-04-23 12:40:53Z 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 :
1294 richard 9
#	1 tracability of the consultation equipment with The 'Netflow' kernel module (iptables target = NETFLOW);
1221 richard 10
#	2 protection of ALCASAR with the Ulog group 1 (default group) 
1294 richard 11
#	3 SSH on ALCASAR with the Ulog group 2;
12
#	4 extern access attempts on ALCASAR 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}
1332 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
1332 richard 76
# destroy all SET
1291 richard 77
ipset destroy
78
 
1294 richard 79
# Création et peuplement du SET alcasar_ip_blocked
80
# creation and first populating of alcasar_ip_blocked SET
1291 richard 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
			ipset add alcasar_ip_blocked $ip_blocked
90
		fi
91
	done < /usr/local/etc/alcasar-ip-blocked
92
fi
93
 
1294 richard 94
# Création et initialisation du SET authenticated_ip (dynamiquement peuplé par les scripts conup/condown)
95
# creation and initialization of authenticated_ip_ SET (populated dynamicly by conup/condown scripts)
96
ipset create authenticated_ip hash:net hashsize 1024
97
OLDIFS=$IFS
98
IFS=$'\n'
99
for equipment in `/usr/sbin/chilli_query list |grep -v "\.0\.0\.0"`
100
do
101
	active_ip=`echo $equipment |cut -d" " -f2`
102
	active_session=`echo $equipment |cut -d" " -f5`
103
	if [[ $(expr $active_session) -eq 1 ]]
104
	then
105
		ipset add authenticated_ip $active_ip
106
	fi
107
done
108
IFS=$OLDIFS
109
 
1332 richard 110
# Calcul de la taille du SET blacklist_ip_blocked
111
# Computing the length of the blacklist_ip_blocked set
112
cd $BL_IP_CAT
113
ipset_length=$(wc -l * | awk '{print $1}' | tail -n 1)
1294 richard 114
 
1332 richard 115
# Ajout du delta (ip entrées manuellement)
116
# Addition of the delta (ip entered manually)
117
((ipset_length=$ipset_length+10))
118
 
119
# Création du fichier ipset temporaire, remplissage, chargement et suppression
120
echo "create blacklist_ip_blocked hash:net family inet hashsize 1024 maxelem $ipset_length" > ipset_save
121
for category in `ls -1 | cut -d '@' -f1`
122
do
123
	cat $BL_IP_CAT/$category >> ipset_save
124
done
125
ipset -! restore < ipset_save
126
rm -f ipset_save
127
 
128
# Sauvegarde de tous les ipset (pour restaurer après redémarrage)
129
ipset save > /etc/sysconfig/ipset_save
130
 
472 richard 131
#############################
783 richard 132
#       PREROUTING          #
472 richard 133
#############################
783 richard 134
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
135
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
1221 richard 136
$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 137
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
1 root 138
 
783 richard 139
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
140
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
141
# Remarque : Ce port n'est ouvert que lorsque le filtrage est activé
142
# Remark : this port is only open when filtering is on
143
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "
144
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
145
 
1072 richard 146
# Si le filtrage DNS est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions 
783 richard 147
# If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses
148
if [ $DNS_FILTERING = on ]; then
149
	# Compute exception IP
150
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
151
	if [ $nb_exceptions != "0" ]
152
	then
153
		while read ip_exception 
154
		do
155
			$IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT
156
		done < /usr/local/etc/alcasar-filter-exceptions
157
	fi
158
		$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
159
fi
1294 richard 160
# Redirection des requêtes HTTP des IP admin bannies vers ALCASAR (page 'accès interdit')
161
# Redirect HTTP requests of admin banned ip to ALCASAR (access deny window)
162
$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 http
783 richard 163
 
1294 richard 164
# Redirection des requêtes HTTP des IP de la blacklist vers ALCASAR (page 'accès interdit')
165
# Redirect HTTP requests of blacklist ip to ALCASAR (access deny window)
1332 richard 166
if [ $DNS_FILTERING = on ]; then
167
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -m set --match-set blacklist_ip_blocked dst -p tcp --dport http -j REDIRECT --to-port 80
168
fi
1294 richard 169
 
1291 richard 170
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
171
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
1230 crox53 172
$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 173
 
1291 richard 174
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent)
175
# Redirect outbound HTTP requests to DansGuardian (transparent proxy)
783 richard 176
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
177
 
178
# Redirection des requêtes NTP vers le serveur NTP local
179
# Redirect NTP request in local NTP server
180
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
181
 
472 richard 182
#############################
783 richard 183
#         INPUT             #
472 richard 184
#############################
871 richard 185
 
783 richard 186
# Tout passe sur loopback
187
# accept all on loopback
188
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 189
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 190
 
191
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
192
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
472 richard 193
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
194
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
195
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
196
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
675 richard 197
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
498 richard 198
 
871 richard 199
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
200
# Drop broadcast & multicast on EXTIF to avoid log 
783 richard 201
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 202
 
783 richard 203
# On autorise les retours de connexions légitimes par INPUT
204
# Conntrack on INPUT
205
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
373 richard 206
 
1221 richard 207
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
208
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
783 richard 209
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 210
 
783 richard 211
# Autorisation des connexions légitimes à DansGuardian 
212
# Allow connections for DansGuardian
213
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
373 richard 214
 
783 richard 215
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
216
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
217
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
791 richard 218
 
783 richard 219
# autorisation des connexion légitime à DNSMASQ (avec blackhole)
220
# Allow connections for DNSMASQ (with blackhole)
221
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
222
 
223
# Accès direct aux services internes
224
# Internal services access
786 richard 225
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blackhole
226
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
227
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
228
$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
229
$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
230
$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
231
$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 232
 
233
# SSHD rules if activate 
234
if [ $SSH = on ]
520 richard 235
	then
783 richard 236
	$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"
237
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
1063 richard 238
	$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 239
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
520 richard 240
fi
783 richard 241
 
242
# Insertion de règles locales
243
# Here, we add local rules (i.e. VPN from Internet)
244
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
245
        . /usr/local/etc/alcasar-iptables-local.sh
246
fi
247
 
248
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
249
# Deny and log on INPUT from the LAN
250
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
251
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
252
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
253
 
254
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
255
# Reject INTIF access (only when chilli is down)
256
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
257
$IPTABLES -A INPUT -i $INTIF -j REJECT
258
 
259
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
260
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
261
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
262
 
871 richard 263
 
783 richard 264
#############################
265
#        FORWARD            #
266
#############################
267
 
268
# Rejet des requêtes DNS vers Internet
269
# Deny forward DNS
270
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
271
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
272
 
1291 richard 273
# Blocage des IPs du SET alcasar_ip_blocked
274
# Deny IPs of the SET alcasar_ip_blocked 
1294 richard 275
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p icmp -j REJECT --reject-with icmp-port-unreachable
1291 richard 276
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
277
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set alcasar_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset
859 richard 278
 
1294 richard 279
# Blocage des IPs du SET blacklist_ip_blocked
280
# Deny IPs of the SET blacklist_ip_blocked 
1332 richard 281
if [ $DNS_FILTERING = on ]; then
282
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked -p icmp -j REJECT --reject-with icmp-port-unreachable
283
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
284
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set blacklist_ip_blocked -p tcp -j REJECT --reject-with tcp-reset
285
fi
1072 richard 286
 
815 richard 287
# Autorisation des retours de connexions légitimes
288
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 289
 
783 richard 290
#  If protocols filter is activate 
612 richard 291
if [ $PROTOCOLS_FILTERING = on ]; then
688 richard 292
	# Compute exception IP (IP addresses that shouldn't be filtered)
293
	nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
373 richard 294
	if [ $nb_exceptions != "0" ]
295
	then
296
		while read ip_exception 
297
		do
1221 richard 298
#			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
1159 crox53 299
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j NETFLOW
373 richard 300
			$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ACCEPT
301
		done < /usr/local/etc/alcasar-filter-exceptions
302
	fi
871 richard 303
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...) 
304
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
305
	if [ $nb_uamallowed != "0" ]
688 richard 306
	then
307
		while read ip_allowed_line 
308
		do
309
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
1221 richard 310
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
1159 crox53 311
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
688 richard 312
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
313
		done < /usr/local/etc/alcasar-uamallowed
314
	fi
520 richard 315
	# Autorisation des protocoles non commentés
476 richard 316
	# Allow non comment protocols
373 richard 317
	while read svc_line
318
	do
319
		svc_on=`echo $svc_line|cut -b1`
320
		if [ $svc_on != "#" ]
321
		then	
322
			svc_name=`echo $svc_line|cut -d" " -f1`
323
			svc_port=`echo $svc_line|cut -d" " -f2`
324
			if [ $svc_name = "icmp" ]
325
			then
1159 crox53 326
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
859 richard 327
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT 
373 richard 328
			else
1159 crox53 329
 
1221 richard 330
#				$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 "
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				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
859 richard 332
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
1221 richard 333
#				$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 "
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				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
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				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
373 richard 336
			fi
337
		fi
338
	done < /usr/local/etc/alcasar-services
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	# Rejet explicite des autres protocoles
340
	# reject the others protocols
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#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
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	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
343
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
344
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT 
1 root 345
fi
492 franck 346
 
347
#  If QOS is activate  #
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if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
492 franck 349
	. /usr/local/etc/alcasar-iptables-qos.sh 	
350
fi
351
 
498 richard 352
# 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
859 richard 356
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
1 root 357
 
783 richard 358
#############################
359
#         OUTPUT            #
360
#############################
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# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
362
# Everything is allowed but traffic through outside network interface
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$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 364
 
503 richard 365
# On autorise les requêtes DNS vers les serveurs DNS identifiés 
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# Allow DNS requests to identified DNS servers
367
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 368
 
615 richard 369
# 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
498 richard 372
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 373
 
784 richard 374
# On autorise les requêtes FTP 
375
# FTP requests are allowed
376
modprobe ip_conntrack_ftp
377
$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 379
 
615 richard 380
# On autorise les requêtes NTP 
498 richard 381
# NTP requests are allowed
382
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 383
 
503 richard 384
# On autorise les requêtes ICMP (ping) 
385
# ICMP (ping) requests are allowed
386
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 387
 
615 richard 388
# On autorise les requêtes LDAP si un serveur externe est configué
389
# LDAP requests are allowed if an external server is declared
390
if [ $LDAP = on ]
391
	then
694 franck 392
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
393
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
615 richard 394
fi
783 richard 395
 
1159 crox53 396
 
783 richard 397
#############################
398
#       POSTROUTING         #
399
#############################
498 richard 400
# Traduction dynamique d'adresse en sortie
476 richard 401
# Dynamic NAT on EXTIF
1 root 402
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
403
 
476 richard 404
# Save all rules
1 root 405
/etc/init.d/iptables save
406
 
476 richard 407
# End of script
1 root 408