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872 richard 1
#!/bin/bash
64 franck 2
# $Id: alcasar-iptables.sh 1453 2014-09-21 07:27:28Z franck $
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
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# 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 
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conf_file="/usr/local/etc/alcasar.conf"
1392 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}
783 richard 17
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)
1392 richard 21
public_ip_mask=`grep ^PUBLIC_IP= $conf_file|cut -d"=" -f2`		# ALCASAR WAN IP address
783 richard 22
PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1`
1392 richard 23
dns1=`grep ^DNS1= $conf_file|cut -d"=" -f2`				# first public DNS server
615 richard 24
dns1=${dns1:=208.67.220.220}
1392 richard 25
dns2=`grep ^DNS2= $conf_file|cut -d"=" -f2`				# second public DNS server
615 richard 26
dns2=${dns2:=208.67.222.222}
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DNSSERVERS="$dns1,$dns2"						# first and second DNS IP servers addresses
1392 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}
1332 richard 30
BL_IP_CAT="/usr/local/share/iptables-bl-enabled"			# categories files of the BlackListed IP
1339 richard 31
BL_IP_OSSI="/usr/local/share/iptables-bl/ossi"				# ossi categoty
1377 richard 32
WL_IP_OSSI="/usr/local/share/ossi-ip-wl"				# ip of the whitelist
1393 richard 33
DNSMASQ_WL_ENABLED="/usr/local/share/dnsmasq-wl-enabled"		# enabled domain names for the Whitelist
1364 richard 34
TMP_users_set_save="/tmp/users_set_save"				# tmp file for backup users set 
35
TMP_set_save="/tmp/ipset_save"						# tmp file for blacklist and whitelist creation
1392 richard 36
QOS=`grep ^QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
615 richard 37
QOS=${QOS:=off}
1392 richard 38
SSH=`grep ^SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
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SSH=${SSH:=off}
1392 richard 40
SSH_ADMIN_FROM=`grep ^SSH_ADMIN_FROM= $conf_file|cut -d"=" -f2`
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SSH_ADMIN_FROM=${SSH_ADMIN_FROM:="0.0.0.0/0.0.0.0"}			# WAN IP address to reduce ssh access (all ip allowed on LAN side)
1392 richard 42
LDAP=`grep ^LDAP= $conf_file|cut -d"=" -f2`				# LDAP external server active (on/off)
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LDAP=${LDAP:=off}
1392 richard 44
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 46
EXTIF="enp1s0"
47
INTIF="enp2s0"
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TUNIF="tun0"								# listen device for chilli daemon
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IPTABLES="/sbin/iptables"
1339 richard 50
IP_REHABILITEES="/etc/dansguardian/lists/exceptioniplist"		# Rehabilitated IP
1364 richard 51
SAVE_DIR="/etc/sysconfig"						# Saving path
1 root 52
 
1364 richard 53
# Sauvegarde des SET des utilisateurs connectés si ils existent
54
# Saving SET of connected users if it exists
55
ipset list no_filtering_set 1>/dev/null 2>&1
56
if [ $? -eq 0 ];
57
then
58
	ipset save no_filtering_set > $TMP_users_set_save
59
	ipset save havp_set >> $TMP_users_set_save
60
	ipset save havp_bl_set >> $TMP_users_set_save
61
	ipset save havp_wl_set >> $TMP_users_set_save
62
fi
63
 
1291 richard 64
# loading of NetFlow probe (ipt_NETFLOW kernel module)
1159 crox53 65
modprobe ipt_NETFLOW destination=127.0.0.1:2055
66
 
498 richard 67
# Effacement des règles existantes
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# Flush all existing rules
1 root 69
$IPTABLES -F
70
$IPTABLES -t nat -F
71
$IPTABLES -t mangle -F
72
$IPTABLES -F INPUT
73
$IPTABLES -F FORWARD
74
$IPTABLES -F OUTPUT
75
 
498 richard 76
# Suppression des chaines utilisateurs sur les tables filter et nat
77
# Flush non default rules on filter and nat tables
78
$IPTABLES -X
79
$IPTABLES -t nat -X
80
 
81
# Stratégies par défaut
476 richard 82
# Default policies
1 root 83
$IPTABLES -P INPUT DROP
84
$IPTABLES -P FORWARD DROP
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$IPTABLES -P OUTPUT DROP
1 root 86
$IPTABLES -t nat -P PREROUTING ACCEPT
87
$IPTABLES -t nat -P POSTROUTING ACCEPT
88
$IPTABLES -t nat -P OUTPUT ACCEPT
89
 
1291 richard 90
# destruction de tous les SET
1332 richard 91
# destroy all SET
1291 richard 92
ipset destroy
93
 
1377 richard 94
# Calcul de la taille du set de la blacklist
95
# Compute the blacklist set length
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bl_set_length=$(($(wc -l $BL_IP_CAT/* | awk '{print $1}' | tail -n 1)+$(wc -l $BL_IP_OSSI | awk '{print $1}')))
1294 richard 97
 
1339 richard 98
# Création du fichier set temporaire, remplissage, chargement et suppression
1377 richard 99
# Creating the temporary set file, filling, loading and deleting
1393 richard 100
echo "create blacklist_ip_blocked hash:net family inet hashsize 1024 maxelem $bl_set_length" > $TMP_set_save
101
for category in `ls -1 $BL_IP_CAT | cut -d '@' -f1`
1332 richard 102
do
1364 richard 103
	cat $BL_IP_CAT/$category >> $TMP_set_save
1332 richard 104
done
1364 richard 105
cat $BL_IP_OSSI >> $TMP_set_save
106
ipset -! restore < $TMP_set_save
107
rm -f $TMP_set_save
1332 richard 108
 
1339 richard 109
# Extraction des ip réhabilitées
1377 richard 110
# Extracting rehabilitated ip
1339 richard 111
for ip in $(cat $IP_REHABILITEES)
112
do
113
	ipset del blacklist_ip_blocked $ip
114
done
115
 
1393 richard 116
# Calcul de la taille du set de la whitelist
117
# Compute the whitelist set length
118
wl_set_length=$(($(wc -l $DNSMASQ_WL_ENABLED/* | awk '{print $1}' | tail -n 1)*3))
119
 
1364 richard 120
# Création du fichier set temporaire, remplissage, chargement et suppression
1377 richard 121
# Creating the temporary set file, filling, loading and deleting
1393 richard 122
echo "create whitelist_ip_allowed hash:net family inet hashsize 1024 maxelem $wl_set_length" > $TMP_set_save
1377 richard 123
cat $WL_IP_OSSI >> $TMP_set_save
1364 richard 124
ipset -! restore < $TMP_set_save
125
rm -f $TMP_set_save
126
 
127
# Restoration des SET des utilisateurs connectés si ils existent sinon création des SET 
1377 richard 128
# Restoring the connected users SETs if available, otherwise creating SETs
1364 richard 129
if [ -e $TMP_users_set_save ];
130
then
131
	ipset -! restore < $TMP_users_set_save
132
	rm -f $TMP_users_set_save
133
else
134
	ipset create no_filtering_set hash:net hashsize 1024
135
	ipset create havp_set hash:net hashsize 1024
136
	ipset create havp_bl_set hash:net hashsize 1024
137
	ipset create havp_wl_set hash:net hashsize 1024
138
fi
139
 
472 richard 140
#############################
783 richard 141
#       PREROUTING          #
472 richard 142
#############################
1453 franck 143
# Marquage des paquets qui tentent d'accéder directement à un serveur sans authentification en mode proxy pour pouvoir les rejeter en INPUT
144
# Mark packets that attempt to directly access a server without authentication with proxy client to reject them in INPUT rules
145
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp -m tcp --dport 80 -m string --string 'GET http' --algo bm --from 50 --to 70 -j MARK --set-mark 10
146
 
783 richard 147
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
148
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
1221 richard 149
$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 150
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
1 root 151
 
783 richard 152
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
153
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
154
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "
155
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
156
 
1364 richard 157
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 55 pour pouvoir les rejeter en INPUT
158
# Mark (and log) the udp 55 direct attempts to REJECT them in INPUT rules
159
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 55 -j MARK --set-mark 3
783 richard 160
 
1364 richard 161
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8090 pour pouvoir les rejeter en INPUT
162
# Mark (and log) the 8090 direct attempts to REJECT them in INPUT rules
163
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8090 -j MARK --set-mark 4
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1377 richard 165
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8091 pour pouvoir les rejeter en INPUT
166
# Mark (and log) the 8091 direct attempts to REJECT them in INPUT rules
167
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8091 -j MARK --set-mark 5
168
 
1364 richard 169
# havp_bl_set --> redirection vers le port 54
170
# havp_bl_set --> redirect to port 54
171
$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
1393 richard 172
 
1364 richard 173
# havp_wl_set --> redirection vers le port 55
174
# havp_wl_set --> redirect to port 55
175
$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
176
 
177
# Redirection des requêtes HTTP des IP de la blacklist vers ALCASAR (page 'accès interdit') pour le set havp_bl_set
1393 richard 178
# Redirect outbound HTTP requests from blacklist IP to ALCASAR ('access denied' page) for the set havp_bl_set
1364 richard 179
$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
180
 
1393 richard 181
# Redirection des requêtes HTTP des IP qui ne sont pas dans la whitelist vers ALCASAR (page 'accès interdit') pour le set havp_wl_set
182
# Redirect outbound HTTP requests from IP which are not in the whitelist to ALCASAR ('access denied' page) for the set havp_wl_set
183
$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
184
 
1291 richard 185
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
186
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
1230 crox53 187
$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 188
 
1377 richard 189
# Redirection des requêtes HTTP sortantes vers HAVP (8091) pour le set havp_set
190
# Redirect outbound HTTP requests to HAVP (8091) for the set havp_set
191
$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 192
 
1364 richard 193
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent) pour le set havp_bl_set
194
# Redirect outbound HTTP requests to DansGuardian (transparent proxy) for the set havp_bl_set
195
$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
196
 
197
# Redirection des requêtes HTTP sortantes vers HAVP pour le set havp_wl_set
198
# Redirect outbound HTTP requests to HAVP for the set havp_wl_set
1377 richard 199
$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 200
 
783 richard 201
# Redirection des requêtes NTP vers le serveur NTP local
202
# Redirect NTP request in local NTP server
203
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
204
 
472 richard 205
#############################
783 richard 206
#         INPUT             #
472 richard 207
#############################
871 richard 208
 
783 richard 209
# Tout passe sur loopback
210
# accept all on loopback
211
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 212
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 213
 
214
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
215
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
472 richard 216
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
217
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
218
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
219
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
675 richard 220
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
498 richard 221
 
871 richard 222
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
223
# Drop broadcast & multicast on EXTIF to avoid log 
783 richard 224
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 225
 
1453 franck 226
# On rejette les trames marquées dans PREROUTING MANGLE sur marqueur HTTP/header mark 3
227
# Tagged frames are discarded in PREROUTING MANGLE over HTTP/header marker mark 3
228
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m mark --mark 10 -j REJECT --reject-with tcp-reset
229
 
783 richard 230
# On autorise les retours de connexions légitimes par INPUT
231
# Conntrack on INPUT
232
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
373 richard 233
 
1221 richard 234
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
235
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
783 richard 236
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 237
 
783 richard 238
# Autorisation des connexions légitimes à DansGuardian 
239
# Allow connections for DansGuardian
240
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
373 richard 241
 
783 richard 242
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
243
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
1364 richard 244
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
791 richard 245
 
1364 richard 246
# On interdit les connexions directes au port UDP 55. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
247
# Deny direct connections on UDP 55. The concerned paquets are marked in mangle table (PREROUTING)
248
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 55 -m mark --mark 3 -j REJECT --reject-with icmp-port-unreachable
249
 
250
# On interdit les connexions directes au port 8090. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
251
# Deny direct connections on 8090. The concerned paquets are marked in mangle table (PREROUTING)
252
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8090 -m mark --mark 4 -j REJECT --reject-with tcp-reset
253
 
1377 richard 254
# On interdit les connexions directes au port 8091. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
255
# Deny direct connections on 8091. The concerned paquets are marked in mangle table (PREROUTING)
256
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8091 -m mark --mark 5 -j REJECT --reject-with tcp-reset
257
 
1364 richard 258
# Autorisation des connexions légitimes à HAVP 
259
# Allow connections for HAVP
260
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8090 -m state --state NEW --syn -j ACCEPT
261
 
1377 richard 262
# Autorisation des connexions légitimes à HAVP 
263
# Allow connections for HAVP
264
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8091 -m state --state NEW --syn -j ACCEPT
265
 
1364 richard 266
# autorisation des connexion légitime à DNSMASQ (avec blacklist)
267
# Allow connections for DNSMASQ (with blacklist)
783 richard 268
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
269
 
1364 richard 270
# autorisation des connexion légitime à DNSMASQ (avec whitelist)
271
# Allow connections for DNSMASQ (with whitelist)
272
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT
273
 
783 richard 274
# Accès direct aux services internes
275
# Internal services access
1364 richard 276
$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 277
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
278
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
279
$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
280
$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
281
$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
282
$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 283
 
284
# SSHD rules if activate 
285
if [ $SSH = on ]
520 richard 286
	then
783 richard 287
	$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"
288
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
1063 richard 289
	$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 290
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
520 richard 291
fi
783 richard 292
 
293
# Insertion de règles locales
294
# Here, we add local rules (i.e. VPN from Internet)
295
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
296
        . /usr/local/etc/alcasar-iptables-local.sh
297
fi
298
 
299
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
300
# Deny and log on INPUT from the LAN
301
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
302
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
303
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
304
 
1393 richard 305
# Interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
783 richard 306
# Reject INTIF access (only when chilli is down)
307
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
308
$IPTABLES -A INPUT -i $INTIF -j REJECT
309
 
310
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
311
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
312
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
313
 
314
#############################
315
#        FORWARD            #
316
#############################
317
 
1364 richard 318
# Blocage des IPs du SET blacklist_ip_blocked pour le SET havp_bl_set
319
# Deny IPs of the SET blacklist_ip_blocked for the set havp_bl_set
320
$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
321
$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
322
$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
323
 
783 richard 324
# Rejet des requêtes DNS vers Internet
325
# Deny forward DNS
326
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
327
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
328
 
815 richard 329
# Autorisation des retours de connexions légitimes
330
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 331
 
1364 richard 332
#  If protocols filter is activate
333
#if [ $PROTOCOLS_FILTERING = on ]; then
334
#	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...) 
335
#	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
336
#	if [ $nb_uamallowed != "0" ]
337
#	then
338
#		while read ip_allowed_line 
339
#		do
340
#			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
1221 richard 341
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
1364 richard 342
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
343
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
344
#		done < /usr/local/etc/alcasar-uamallowed
345
#	fi
346
#	# Autorisation des protocoles non commentés
347
#	# Allow non comment protocols
348
#	while read svc_line
349
#	do
350
#		svc_on=`echo $svc_line|cut -b1`
351
#		if [ $svc_on != "#" ]
352
#		then	
353
#			svc_name=`echo $svc_line|cut -d" " -f1`
354
#			svc_port=`echo $svc_line|cut -d" " -f2`
355
#			if [ $svc_name = "icmp" ]
356
#			then
357
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
358
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT 
359
#			else
360
#
1221 richard 361
#				$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 362
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
363
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
1221 richard 364
#				$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 365
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
366
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
367
#			fi
368
#		fi
369
#	done < /usr/local/etc/alcasar-services
370
#	# Rejet explicite des autres protocoles
371
#	# reject the others protocols
1221 richard 372
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
1364 richard 373
#	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
374
#	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
375
#	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT 
376
#fi
492 franck 377
 
378
#  If QOS is activate  #
612 richard 379
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
492 franck 380
	. /usr/local/etc/alcasar-iptables-qos.sh 	
381
fi
382
 
498 richard 383
# Autorisation des connections sortant du LAN  
476 richard 384
# Allow forward connections with log
1221 richard 385
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
1159 crox53 386
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
859 richard 387
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
1 root 388
 
783 richard 389
#############################
390
#         OUTPUT            #
391
#############################
1159 crox53 392
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
393
# Everything is allowed but traffic through outside network interface
498 richard 394
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 395
 
503 richard 396
# On autorise les requêtes DNS vers les serveurs DNS identifiés 
498 richard 397
# Allow DNS requests to identified DNS servers
398
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 399
 
615 richard 400
# On autorise les requêtes HTTP sortantes
498 richard 401
# HTTP requests are allowed
1159 crox53 402
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
498 richard 403
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 404
 
784 richard 405
# On autorise les requêtes FTP 
406
# FTP requests are allowed
407
modprobe ip_conntrack_ftp
408
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
1159 crox53 409
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
784 richard 410
 
615 richard 411
# On autorise les requêtes NTP 
498 richard 412
# NTP requests are allowed
413
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 414
 
503 richard 415
# On autorise les requêtes ICMP (ping) 
416
# ICMP (ping) requests are allowed
417
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 418
 
615 richard 419
# On autorise les requêtes LDAP si un serveur externe est configué
420
# LDAP requests are allowed if an external server is declared
421
if [ $LDAP = on ]
422
	then
694 franck 423
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
424
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
615 richard 425
fi
783 richard 426
 
427
#############################
428
#       POSTROUTING         #
429
#############################
498 richard 430
# Traduction dynamique d'adresse en sortie
476 richard 431
# Dynamic NAT on EXTIF
1 root 432
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
433
 
476 richard 434
# End of script
1 root 435