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872 richard 1
#!/bin/bash
64 franck 2
# $Id: alcasar-iptables.sh 1377 2014-06-10 22:16:50Z richard $
675 richard 3
# Script de mise en place des regles du parefeu d'Alcasar (mode normal)
1339 richard 4
# This script writes 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= $conf_file|cut -d"=" -f2`
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private_ip_mask=${private_ip_mask:=192.168.182.1/24}
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PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1`			# ALCASAR LAN IP address
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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= $conf_file|cut -d"=" -f2`				# first public DNS server
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dns1=${dns1:=208.67.220.220}
766 richard 25
dns2=`grep DNS2= $conf_file|cut -d"=" -f2`				# second public DNS server
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dns2=${dns2:=208.67.222.222}
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DNSSERVERS="$dns1,$dns2"						# first and second DNS IP servers addresses
766 richard 28
PROTOCOLS_FILTERING=`grep PROTOCOLS_FILTERING= $conf_file|cut -d"=" -f2`	# Network protocols filter (on/off)
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PROTOCOLS_FILTERING=${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
1377 richard 33
WL_IP_CAT="/usr/local/share/iptables-wl-enabled"			# categories files of the WhiteListed IP
1339 richard 34
BL_IP_OSSI="/usr/local/share/iptables-bl/ossi"				# ossi categoty
1377 richard 35
WL_IP_OSSI="/usr/local/share/ossi-ip-wl"				# ip of the whitelist
36
WL_IP_OSSI_DOMAIN="/usr/local/share/iptables-wl/ossi"			# ip of the domain names whitelist
1364 richard 37
TMP_users_set_save="/tmp/users_set_save"				# tmp file for backup users set 
38
TMP_set_save="/tmp/ipset_save"						# tmp file for blacklist and whitelist creation
783 richard 39
QOS=`grep QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
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QOS=${QOS:=off}
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SSH=`grep SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
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SSH=${SSH:=off}
1063 richard 43
SSH_ADMIN_FROM=`grep SSH_ADMIN_FROM= $conf_file|cut -d"=" -f2`
44
SSH_ADMIN_FROM=${SSH_ADMIN_FROM:="0.0.0.0/0.0.0.0"}			# WAN IP address to reduce ssh access (all ip allowed on LAN side)
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LDAP=`grep LDAP= $conf_file|cut -d"=" -f2`				# LDAP external server active (on/off)
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LDAP=${LDAP:=off}
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LDAP_IP=`grep LDAP_IP= $conf_file|cut -d"=" -f2`			# WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
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LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
1377 richard 49
EXTIF="enp1s0"
50
INTIF="enp2s0"
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TUNIF="tun0"								# listen device for chilli daemon
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IPTABLES="/sbin/iptables"
1339 richard 53
IP_REHABILITEES="/etc/dansguardian/lists/exceptioniplist"		# Rehabilitated IP
1364 richard 54
SAVE_DIR="/etc/sysconfig"						# Saving path
1 root 55
 
1364 richard 56
# Sauvegarde des SET des utilisateurs connectés si ils existent
57
# Saving SET of connected users if it exists
58
ipset list no_filtering_set 1>/dev/null 2>&1
59
if [ $? -eq 0 ];
60
then
61
	ipset save no_filtering_set > $TMP_users_set_save
62
	ipset save havp_set >> $TMP_users_set_save
63
	ipset save havp_bl_set >> $TMP_users_set_save
64
	ipset save havp_wl_set >> $TMP_users_set_save
65
fi
66
 
1291 richard 67
# loading of NetFlow probe (ipt_NETFLOW kernel module)
1159 crox53 68
modprobe ipt_NETFLOW destination=127.0.0.1:2055
69
 
498 richard 70
# Effacement des règles existantes
476 richard 71
# Flush all existing rules
1 root 72
$IPTABLES -F
73
$IPTABLES -t nat -F
74
$IPTABLES -t mangle -F
75
$IPTABLES -F INPUT
76
$IPTABLES -F FORWARD
77
$IPTABLES -F OUTPUT
78
 
498 richard 79
# Suppression des chaines utilisateurs sur les tables filter et nat
80
# Flush non default rules on filter and nat tables
81
$IPTABLES -X
82
$IPTABLES -t nat -X
83
 
84
# Stratégies par défaut
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# Default policies
1 root 86
$IPTABLES -P INPUT DROP
87
$IPTABLES -P FORWARD DROP
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$IPTABLES -P OUTPUT DROP
1 root 89
$IPTABLES -t nat -P PREROUTING ACCEPT
90
$IPTABLES -t nat -P POSTROUTING ACCEPT
91
$IPTABLES -t nat -P OUTPUT ACCEPT
92
 
1291 richard 93
# destruction de tous les SET
1332 richard 94
# destroy all SET
1291 richard 95
ipset destroy
96
 
1377 richard 97
# Calcul de la taille du set de la blacklist
98
# Compute the blacklist set length
1332 richard 99
cd $BL_IP_CAT
1364 richard 100
set_bl_length=$(($(wc -l * | awk '{print $1}' | tail -n 1)+$(wc -l $BL_IP_OSSI | awk '{print $1}')))
1294 richard 101
 
1339 richard 102
# Création du fichier set temporaire, remplissage, chargement et suppression
1377 richard 103
# Creating the temporary set file, filling, loading and deleting
1364 richard 104
echo "create blacklist_ip_blocked hash:net family inet hashsize 1024 maxelem $set_bl_length" > $TMP_set_save
1332 richard 105
for category in `ls -1 | cut -d '@' -f1`
106
do
1364 richard 107
	cat $BL_IP_CAT/$category >> $TMP_set_save
1332 richard 108
done
1364 richard 109
cat $BL_IP_OSSI >> $TMP_set_save
110
ipset -! restore < $TMP_set_save
111
rm -f $TMP_set_save
1332 richard 112
 
1339 richard 113
# Extraction des ip réhabilitées
1377 richard 114
# Extracting rehabilitated ip
1339 richard 115
for ip in $(cat $IP_REHABILITEES)
116
do
117
	ipset del blacklist_ip_blocked $ip
118
done
119
 
1364 richard 120
# Calcul de la taille du set de la whitelist
1377 richard 121
# Compute the whitelist set length
122
cd $WL_IP_CAT
123
set_wl_length=$(($(wc -l * | awk '{print $1}' | tail -n 1)+$(wc -l $WL_IP_OSSI | awk '{print $1}')+$(wc -l $WL_IP_OSSI_DOMAIN | awk '{print $1}')))
1332 richard 124
 
1364 richard 125
# Création du fichier set temporaire, remplissage, chargement et suppression
1377 richard 126
# Creating the temporary set file, filling, loading and deleting
1364 richard 127
echo "create whitelist_ip_allowed hash:net family inet hashsize 1024 maxelem $set_wl_length" > $TMP_set_save
1377 richard 128
for category in `ls -1 | cut -d '@' -f1`
129
do
130
	cat $WL_IP_CAT/$category >> $TMP_set_save
131
done
132
cat $WL_IP_OSSI >> $TMP_set_save
133
cat $WL_IP_OSSI_DOMAIN >> $TMP_set_save
1364 richard 134
ipset -! restore < $TMP_set_save
135
rm -f $TMP_set_save
136
 
137
# Restoration des SET des utilisateurs connectés si ils existent sinon création des SET 
1377 richard 138
# Restoring the connected users SETs if available, otherwise creating SETs
1364 richard 139
if [ -e $TMP_users_set_save ];
140
then
141
	ipset -! restore < $TMP_users_set_save
142
	rm -f $TMP_users_set_save
143
else
144
	ipset create no_filtering_set hash:net hashsize 1024
145
	ipset create havp_set hash:net hashsize 1024
146
	ipset create havp_bl_set hash:net hashsize 1024
147
	ipset create havp_wl_set hash:net hashsize 1024
148
fi
149
 
150
# Sauvegarde de tous les set sauf ceux d'interception (pour restaurer après redémarrage)
1377 richard 151
# Backup all sets except interception set
1364 richard 152
ipset save blacklist_ip_blocked > $SAVE_DIR/ipset_save
153
ipset save whitelist_ip_allowed >> $SAVE_DIR/ipset_save
154
echo "create no_filtering_set hash:net family inet hashsize 1024 maxelem 65536" >> $SAVE_DIR/ipset_save
155
echo "create havp_set hash:net family inet hashsize 1024 maxelem 65536" >> $SAVE_DIR/ipset_save
156
echo "create havp_bl_set hash:net family inet hashsize 1024 maxelem 65536" >> $SAVE_DIR/ipset_save
157
echo "create havp_wl_set hash:net family inet hashsize 1024 maxelem 65536" >> $SAVE_DIR/ipset_save
158
 
472 richard 159
#############################
783 richard 160
#       PREROUTING          #
472 richard 161
#############################
783 richard 162
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
163
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
1221 richard 164
$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 165
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
1 root 166
 
783 richard 167
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
168
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
169
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "
170
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
171
 
1364 richard 172
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 55 pour pouvoir les rejeter en INPUT
173
# Mark (and log) the udp 55 direct attempts to REJECT them in INPUT rules
174
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 55 -j MARK --set-mark 3
783 richard 175
 
1364 richard 176
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8090 pour pouvoir les rejeter en INPUT
177
# Mark (and log) the 8090 direct attempts to REJECT them in INPUT rules
178
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8090 -j MARK --set-mark 4
1294 richard 179
 
1377 richard 180
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8091 pour pouvoir les rejeter en INPUT
181
# Mark (and log) the 8091 direct attempts to REJECT them in INPUT rules
182
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8091 -j MARK --set-mark 5
183
 
1364 richard 184
# Aiguillage des flux DNS
185
# Switching DNS streams
186
# havp_bl_set --> redirection vers le port 54
187
# havp_bl_set --> redirect to port 54
188
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl_set src -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
189
# havp_wl_set --> redirection vers le port 55
190
# havp_wl_set --> redirect to port 55
191
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl_set src -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 55
192
 
193
# Redirection des requêtes HTTP des IP de la blacklist vers ALCASAR (page 'accès interdit') pour le set havp_bl_set
194
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl_set src -m set --match-set blacklist_ip_blocked dst -p tcp --dport http -j REDIRECT --to-port 80
195
 
1377 richard 196
# Redirection des requêtes HTTP des IP qui ne sont pas dans la whitelist vers ALCASAR (page 'accès interdit') pour le set havp_wl_set
197
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl_set src -m set ! --match-set whitelist_ip_allowed dst -p tcp --dport http -j REDIRECT --to-port 80
198
 
1291 richard 199
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
200
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
1230 crox53 201
$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 202
 
1377 richard 203
# Redirection des requêtes HTTP sortantes vers HAVP (8091) pour le set havp_set
204
# Redirect outbound HTTP requests to HAVP (8091) for the set havp_set
205
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_set src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8091
783 richard 206
 
1364 richard 207
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent) pour le set havp_bl_set
208
# Redirect outbound HTTP requests to DansGuardian (transparent proxy) for the set havp_bl_set
209
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl_set src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
210
 
211
# Redirection des requêtes HTTP sortantes vers HAVP pour le set havp_wl_set
212
# Redirect outbound HTTP requests to HAVP for the set havp_wl_set
1377 richard 213
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl_set src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8091
1364 richard 214
 
783 richard 215
# Redirection des requêtes NTP vers le serveur NTP local
216
# Redirect NTP request in local NTP server
217
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
218
 
472 richard 219
#############################
783 richard 220
#         INPUT             #
472 richard 221
#############################
871 richard 222
 
783 richard 223
# Tout passe sur loopback
224
# accept all on loopback
225
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 226
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 227
 
228
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
229
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
472 richard 230
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
231
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
232
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
233
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
675 richard 234
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
498 richard 235
 
871 richard 236
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
237
# Drop broadcast & multicast on EXTIF to avoid log 
783 richard 238
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 239
 
783 richard 240
# On autorise les retours de connexions légitimes par INPUT
241
# Conntrack on INPUT
242
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
373 richard 243
 
1221 richard 244
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
245
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
783 richard 246
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 247
 
783 richard 248
# Autorisation des connexions légitimes à DansGuardian 
249
# Allow connections for DansGuardian
250
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
373 richard 251
 
783 richard 252
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
253
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
1364 richard 254
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
791 richard 255
 
1364 richard 256
# On interdit les connexions directes au port UDP 55. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
257
# Deny direct connections on UDP 55. The concerned paquets are marked in mangle table (PREROUTING)
258
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 55 -m mark --mark 3 -j REJECT --reject-with icmp-port-unreachable
259
 
260
# On interdit les connexions directes au port 8090. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
261
# Deny direct connections on 8090. The concerned paquets are marked in mangle table (PREROUTING)
262
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8090 -m mark --mark 4 -j REJECT --reject-with tcp-reset
263
 
1377 richard 264
# On interdit les connexions directes au port 8091. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
265
# Deny direct connections on 8091. The concerned paquets are marked in mangle table (PREROUTING)
266
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8091 -m mark --mark 5 -j REJECT --reject-with tcp-reset
267
 
1364 richard 268
# Autorisation des connexions légitimes à HAVP 
269
# Allow connections for HAVP
270
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8090 -m state --state NEW --syn -j ACCEPT
271
 
1377 richard 272
# Autorisation des connexions légitimes à HAVP 
273
# Allow connections for HAVP
274
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8091 -m state --state NEW --syn -j ACCEPT
275
 
1364 richard 276
# autorisation des connexion légitime à DNSMASQ (avec blacklist)
277
# Allow connections for DNSMASQ (with blacklist)
783 richard 278
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
279
 
1364 richard 280
# autorisation des connexion légitime à DNSMASQ (avec whitelist)
281
# Allow connections for DNSMASQ (with whitelist)
282
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT
283
 
783 richard 284
# Accès direct aux services internes
285
# Internal services access
1364 richard 286
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS non filtré # DNS without blacklist
786 richard 287
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
288
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
289
$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
290
$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
291
$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
292
$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 293
 
294
# SSHD rules if activate 
295
if [ $SSH = on ]
520 richard 296
	then
783 richard 297
	$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"
298
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
1063 richard 299
	$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 300
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
520 richard 301
fi
783 richard 302
 
303
# Insertion de règles locales
304
# Here, we add local rules (i.e. VPN from Internet)
305
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
306
        . /usr/local/etc/alcasar-iptables-local.sh
307
fi
308
 
309
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
310
# Deny and log on INPUT from the LAN
311
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
312
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
313
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
314
 
315
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
316
# Reject INTIF access (only when chilli is down)
317
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
318
$IPTABLES -A INPUT -i $INTIF -j REJECT
319
 
320
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
321
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
322
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
323
 
324
#############################
325
#        FORWARD            #
326
#############################
327
 
1364 richard 328
# Blocage des IPs du SET blacklist_ip_blocked pour le SET havp_bl_set
329
# Deny IPs of the SET blacklist_ip_blocked for the set havp_bl_set
330
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set havp_bl_set src -m set --match-set blacklist_ip_blocked dst -p icmp -j REJECT --reject-with icmp-port-unreachable
331
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set havp_bl_set src -m set --match-set blacklist_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
332
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set havp_bl_set src -m set --match-set blacklist_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset
333
 
783 richard 334
# Rejet des requêtes DNS vers Internet
335
# Deny forward DNS
336
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
337
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
338
 
815 richard 339
# Autorisation des retours de connexions légitimes
340
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 341
 
1364 richard 342
#  If protocols filter is activate
343
#if [ $PROTOCOLS_FILTERING = on ]; then
344
#	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...) 
345
#	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
346
#	if [ $nb_uamallowed != "0" ]
347
#	then
348
#		while read ip_allowed_line 
349
#		do
350
#			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
1221 richard 351
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
1364 richard 352
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
353
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
354
#		done < /usr/local/etc/alcasar-uamallowed
355
#	fi
356
#	# Autorisation des protocoles non commentés
357
#	# Allow non comment protocols
358
#	while read svc_line
359
#	do
360
#		svc_on=`echo $svc_line|cut -b1`
361
#		if [ $svc_on != "#" ]
362
#		then	
363
#			svc_name=`echo $svc_line|cut -d" " -f1`
364
#			svc_port=`echo $svc_line|cut -d" " -f2`
365
#			if [ $svc_name = "icmp" ]
366
#			then
367
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
368
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT 
369
#			else
370
#
1221 richard 371
#				$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 "
1364 richard 372
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
373
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
1221 richard 374
#				$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 "
1364 richard 375
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
376
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
377
#			fi
378
#		fi
379
#	done < /usr/local/etc/alcasar-services
380
#	# Rejet explicite des autres protocoles
381
#	# reject the others protocols
1221 richard 382
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
1364 richard 383
#	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
384
#	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
385
#	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT 
386
#fi
492 franck 387
 
388
#  If QOS is activate  #
612 richard 389
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
492 franck 390
	. /usr/local/etc/alcasar-iptables-qos.sh 	
391
fi
392
 
498 richard 393
# Autorisation des connections sortant du LAN  
476 richard 394
# Allow forward connections with log
1221 richard 395
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
1159 crox53 396
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
859 richard 397
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
1 root 398
 
783 richard 399
#############################
400
#         OUTPUT            #
401
#############################
1159 crox53 402
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
403
# Everything is allowed but traffic through outside network interface
498 richard 404
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 405
 
503 richard 406
# On autorise les requêtes DNS vers les serveurs DNS identifiés 
498 richard 407
# Allow DNS requests to identified DNS servers
408
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 409
 
615 richard 410
# On autorise les requêtes HTTP sortantes
498 richard 411
# HTTP requests are allowed
1159 crox53 412
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
498 richard 413
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 414
 
784 richard 415
# On autorise les requêtes FTP 
416
# FTP requests are allowed
417
modprobe ip_conntrack_ftp
418
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
1159 crox53 419
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
784 richard 420
 
615 richard 421
# On autorise les requêtes NTP 
498 richard 422
# NTP requests are allowed
423
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 424
 
503 richard 425
# On autorise les requêtes ICMP (ping) 
426
# ICMP (ping) requests are allowed
427
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 428
 
615 richard 429
# On autorise les requêtes LDAP si un serveur externe est configué
430
# LDAP requests are allowed if an external server is declared
431
if [ $LDAP = on ]
432
	then
694 franck 433
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
434
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
615 richard 435
fi
783 richard 436
 
437
#############################
438
#       POSTROUTING         #
439
#############################
498 richard 440
# Traduction dynamique d'adresse en sortie
476 richard 441
# Dynamic NAT on EXTIF
1 root 442
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
443
 
476 richard 444
# Save all rules
1370 richard 445
/usr/libexec/iptables.init save
1 root 446
 
476 richard 447
# End of script
1 root 448