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872 richard 1
#!/bin/bash
64 franck 2
# $Id: alcasar-iptables.sh 1544 2014-12-23 16:48:10Z 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
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# There are four channels for log :
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#	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.
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# The bootps/dhcp (67) port is always open on tun0/INTIF by coova 
14
CONF_FILE="/usr/local/etc/alcasar.conf"
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)
1469 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`
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dns1=`grep ^DNS1= $CONF_FILE|cut -d"=" -f2`				# first public DNS server
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dns1=${dns1:=208.67.220.220}
1469 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
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PROTOCOLS_FILTERING=`grep ^PROTOCOLS_FILTERING= $CONF_FILE|cut -d"=" -f2`	# Network protocols filter (on/off)
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PROTOCOLS_FILTERING=${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
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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= $CONF_FILE|cut -d"=" -f2`				# sshd active (on/off)
615 richard 39
SSH=${SSH:=off}
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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)
1469 richard 42
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"}
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EXTIF=`grep ^EXTIF= $CONF_FILE|cut -d"=" -f2`				# EXTernal InterFace
47
INTIF=`grep ^INTIF= $CONF_FILE|cut -d"=" -f2`				# INTernal InterFace
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TUNIF="tun0"								# listen device for chilli daemon
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IPTABLES="/sbin/iptables"
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IP_REHABILITEES="/etc/dansguardian/lists/exceptioniplist"		# Rehabilitated IP
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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)
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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
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# Default policies
1 root 83
$IPTABLES -P INPUT DROP
84
$IPTABLES -P FORWARD DROP
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$IPTABLES -P OUTPUT DROP
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$IPTABLES -t nat -P PREROUTING ACCEPT
87
$IPTABLES -t nat -P POSTROUTING ACCEPT
88
$IPTABLES -t nat -P OUTPUT ACCEPT
89
 
1484 richard 90
 
91
#############################
92
#          IPSET            #
93
#############################
94
 
1291 richard 95
# destruction de tous les SET
1332 richard 96
# destroy all SET
1291 richard 97
ipset destroy
98
 
1484 richard 99
###### BL set  ###########
100
# Calcul de la taille / Compute the 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}')))
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# Chargement / loading
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echo "create blacklist_ip_blocked hash:net family inet hashsize 1024 maxelem $bl_set_length" > $TMP_set_save
104
for category in `ls -1 $BL_IP_CAT | cut -d '@' -f1`
1332 richard 105
do
1364 richard 106
	cat $BL_IP_CAT/$category >> $TMP_set_save
1332 richard 107
done
1364 richard 108
cat $BL_IP_OSSI >> $TMP_set_save
109
ipset -! restore < $TMP_set_save
110
rm -f $TMP_set_save
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# Suppression des ip réhabilitées / Removing of rehabilitated ip
1339 richard 112
for ip in $(cat $IP_REHABILITEES)
113
do
114
	ipset del blacklist_ip_blocked $ip
115
done
116
 
1484 richard 117
###### WL set  ###########
118
# Calcul de la taille / Compute the length
1393 richard 119
wl_set_length=$(($(wc -l $DNSMASQ_WL_ENABLED/* | awk '{print $1}' | tail -n 1)*3))
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# Chargement Loading
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echo "create whitelist_ip_allowed hash:net family inet hashsize 1024 maxelem $wl_set_length" > $TMP_set_save
1377 richard 122
cat $WL_IP_OSSI >> $TMP_set_save
1364 richard 123
ipset -! restore < $TMP_set_save
124
rm -f $TMP_set_save
125
 
126
# Restoration des SET des utilisateurs connectés si ils existent sinon création des SET 
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# Restoring the connected users SETs if available, otherwise creating SETs
1364 richard 128
if [ -e $TMP_users_set_save ];
129
then
130
	ipset -! restore < $TMP_users_set_save
131
	rm -f $TMP_users_set_save
132
else
133
	ipset create no_filtering_set hash:net hashsize 1024
134
	ipset create havp_set hash:net hashsize 1024
135
	ipset create havp_bl_set hash:net hashsize 1024
136
	ipset create havp_wl_set hash:net hashsize 1024
137
fi
138
 
472 richard 139
#############################
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#       PREROUTING          #
472 richard 141
#############################
1453 franck 142
# Marquage des paquets qui tentent d'accéder directement à un serveur sans authentification en mode proxy pour pouvoir les rejeter en INPUT
143
# Mark packets that attempt to directly access a server without authentication with proxy client to reject them in INPUT rules
1459 franck 144
#$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
1453 franck 145
 
1486 richard 146
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au 8080 (DansGuardian) pour pouvoir les rejeter en INPUT
783 richard 147
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
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$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 149
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
1 root 150
 
1486 richard 151
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8090 (tinyproxy) pour pouvoir les rejeter en INPUT
152
# Mark (and log) the 8090 direct attempts to REJECT them in INPUT rules
1544 richard 153
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8090 -j ULOG --ulog-prefix "RULE direct-proxy -- DENY "
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$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8090 -j MARK --set-mark 2
155
 
1484 richard 156
# Marquage des paquets qui tentent d'accéder directement au port udp 54 (DNS-blacklist) pour pouvoir les rejeter en INPUT
157
# Mark the udp 54 direct attempts (DNS-blacklist) to REJECT them in INPUT rules
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$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 3
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1484 richard 160
# Marquage des paquets qui tentent d'accéder directement au port udp 55 (DNS-Whitelist) pour pouvoir les rejeter en INPUT
161
# Mark the udp 55 direct attempts (DNS-whitelist) to REJECT them in INPUT rules
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$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 55 -j MARK --set-mark 4
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1484 richard 164
# Marquage des paquets qui tentent d'accéder directement au port udp 56 (DNS-Blackhole) pour pouvoir les rejeter en INPUT
165
# Mark the udp 56 direct attempts (DNS-blackhole) to REJECT them in INPUT rules
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$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 56 -j MARK --set-mark 5
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1544 richard 168
# redirection DNS des usagers 'havp_bl' vers le port 54
169
# redirect DNS of 'havp_bl' users to port 54
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$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 171
 
1544 richard 172
# redirection DNS des usagers 'havp_wl' vers le port 55
173
# redirect DNS of 'havp_bl' users to port 55
1364 richard 174
$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
175
 
1544 richard 176
# Journalisation HTTP_Internet des usagers 'havp_bl' (paquets SYN uniquement). Les autres protocoles sont journalisés en FORWARD par netflow. 
177
# Log Internet HTTP of 'havp_bl' users" (only syn packets). Other protocols are logged in FORWARD by netflow
178
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl_set src ! -d $PRIVATE_IP -p tcp --dport http -m state --state NEW -j ULOG --ulog-prefix "RULE F_http -- ACCEPT "
179
 
180
# Redirection HTTP des usagers 'havp_bl' cherchant à joindre les IP de la blacklist vers ALCASAR (page 'accès interdit')
181
# Redirect HTTP of 'havp_bl' users who want blacklist IP to ALCASAR ('access denied' page)
1364 richard 182
$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
183
 
1544 richard 184
# Redirection HTTP des usagers 'havp_wl' cherchant à joindre les IP qui ne sont pas dans la WL vers ALCASAR (page 'accès interdit')
185
# Redirect HTTP of 'havp_wl' users who want IP not in the WL to ALCASAR ('access denied' page)
1393 richard 186
$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
187
 
1544 richard 188
# Redirection des requêtes HTTP sortantes des usagers 'havp_bl' vers DansGuardian
1484 richard 189
# Redirect outbound HTTP requests of "BL" users to DansGuardian (transparent proxy)
190
$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
191
 
1544 richard 192
# Redirection des requêtes HTTP sortantes des usager 'havp_wl' et 'havp' vers Tinyproxy
1486 richard 193
# Redirect outbound HTTP requests for "WL-antivirus" users to Tinyproxy
1484 richard 194
$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 8090
1544 richard 195
$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 8090
1364 richard 196
 
783 richard 197
# Redirection des requêtes NTP vers le serveur NTP local
198
# Redirect NTP request in local NTP server
199
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
200
 
472 richard 201
#############################
783 richard 202
#         INPUT             #
472 richard 203
#############################
871 richard 204
 
783 richard 205
# Tout passe sur loopback
206
# accept all on loopback
207
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 208
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 209
 
210
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
211
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
472 richard 212
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
213
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
214
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
215
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
675 richard 216
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
498 richard 217
 
871 richard 218
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
219
# Drop broadcast & multicast on EXTIF to avoid log 
783 richard 220
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 221
 
783 richard 222
# On autorise les retours de connexions légitimes par INPUT
223
# Conntrack on INPUT
224
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
373 richard 225
 
1221 richard 226
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
1486 richard 227
# Deny direct connections on DansGuardian port (8080). The concerned paquets have been marked and logged in mangle table (PREROUTING)
783 richard 228
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 229
 
783 richard 230
# Autorisation des connexions légitimes à DansGuardian 
231
# Allow connections for DansGuardian
232
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
373 richard 233
 
1486 richard 234
# On interdit les connexions directes au port utilisé par tinyproxy (8090). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
235
# Deny direct connections on tinyproxy port (8090). The concerned paquets have been marked in mangle table (PREROUTING)
236
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8090 -m mark --mark 2 -j REJECT --reject-with tcp-reset
237
 
238
# Autorisation des connexions légitimes vers tinyproxy 
239
# Allow connections to tinyproxy
240
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8090 -m state --state NEW --syn -j ACCEPT
241
 
1472 richard 242
# On interdit les connexions directes au port UDP 54 (DNS-blacklist). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
243
# Deny direct connections on UDP 54 (DNS-blacklist). The concerned paquets are marked in mangle table (PREROUTING)
1486 richard 244
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 54 -m mark --mark 3 -j REJECT --reject-with icmp-port-unreachable
791 richard 245
 
1472 richard 246
# On interdit les connexions directes au port UDP 55 (DNS-whitelist). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
247
# Deny direct connections on UDP 55 (DNS-whitelist). The concerned paquets are marked in mangle table (PREROUTING)
1486 richard 248
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 55 -m mark --mark 4 -j REJECT --reject-with icmp-port-unreachable
1364 richard 249
 
1472 richard 250
# On interdit les connexions directes au port UDP 56 (DNS-Blackhole). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
251
# Deny direct connections on UDP 56 (DNS-blackhole). The concerned paquets are marked in mangle table (PREROUTING)
1486 richard 252
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 56 -m mark --mark 5 -j REJECT --reject-with icmp-port-unreachable
1472 richard 253
 
1364 richard 254
# autorisation des connexion légitime à DNSMASQ (avec blacklist)
255
# Allow connections for DNSMASQ (with blacklist)
783 richard 256
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
257
 
1364 richard 258
# autorisation des connexion légitime à DNSMASQ (avec whitelist)
259
# Allow connections for DNSMASQ (with whitelist)
260
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT
261
 
1472 richard 262
# autorisation des connexion légitime à DNSMASQ (mode blackhole)
263
# Allow connections for DNSMASQ (blackhole mode)
264
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 56 -j ACCEPT
265
 
783 richard 266
# Accès direct aux services internes
267
# Internal services access
1364 richard 268
$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 269
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
270
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
271
$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
272
$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
273
$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
274
$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 275
 
276
# SSHD rules if activate 
277
if [ $SSH = on ]
520 richard 278
	then
783 richard 279
	$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"
280
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
1063 richard 281
	$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 282
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
520 richard 283
fi
783 richard 284
 
285
# Insertion de règles locales
286
# Here, we add local rules (i.e. VPN from Internet)
287
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
288
        . /usr/local/etc/alcasar-iptables-local.sh
289
fi
290
 
291
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
292
# Deny and log on INPUT from the LAN
293
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
294
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
295
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
296
 
1393 richard 297
# Interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
783 richard 298
# Reject INTIF access (only when chilli is down)
299
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
300
$IPTABLES -A INPUT -i $INTIF -j REJECT
301
 
302
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
303
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
304
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
305
 
306
#############################
307
#        FORWARD            #
308
#############################
309
 
1364 richard 310
# Blocage des IPs du SET blacklist_ip_blocked pour le SET havp_bl_set
311
# Deny IPs of the SET blacklist_ip_blocked for the set havp_bl_set
312
$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
313
$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
314
$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
315
 
783 richard 316
# Rejet des requêtes DNS vers Internet
317
# Deny forward DNS
318
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
319
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
320
 
815 richard 321
# Autorisation des retours de connexions légitimes
322
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 323
 
1364 richard 324
#  If protocols filter is activate
1488 richard 325
if [ $PROTOCOLS_FILTERING = on ]; then
326
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...) 
327
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
328
	if [ $nb_uamallowed != "0" ]
329
	then
330
		while read ip_allowed_line 
331
		do
332
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
333
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
334
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
335
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
336
		done < /usr/local/etc/alcasar-uamallowed
337
	fi
338
	# Autorisation du HTTP et des protocoles non commentés
339
	# Allow HTTP and non comment protocols
340
	$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport http -m state --state NEW -j ULOG --ulog-prefix "RULE F_TCP-$svc_name -- ACCEPT "
341
	$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport http -m state --state NEW -j NETFLOW
342
	$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport http -m state --state NEW -j ACCEPT
343
	while read svc_line
344
	do
345
		svc_on=`echo $svc_line|cut -b1`
346
		if [ $svc_on != "#" ]
347
		then	
348
			svc_name=`echo $svc_line|cut -d" " -f1`
349
			svc_port=`echo $svc_line|cut -d" " -f2`
350
			if [ $svc_name = "icmp" ]
351
			then
352
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
353
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT 
354
			else
492 franck 355
 
1488 richard 356
				$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 "
357
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
358
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
359
				$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 "
360
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
361
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
362
			fi
363
		fi
364
	done < /usr/local/etc/alcasar-services
365
	# Rejet explicite des autres protocoles
366
	# reject the others protocols
367
	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
368
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
369
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
370
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT 
371
fi
372
 
492 franck 373
#  If QOS is activate  #
612 richard 374
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
492 franck 375
	. /usr/local/etc/alcasar-iptables-qos.sh 	
376
fi
377
 
498 richard 378
# Autorisation des connections sortant du LAN  
476 richard 379
# Allow forward connections with log
1221 richard 380
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
1159 crox53 381
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
859 richard 382
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
1 root 383
 
783 richard 384
#############################
385
#         OUTPUT            #
386
#############################
1159 crox53 387
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
388
# Everything is allowed but traffic through outside network interface
498 richard 389
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 390
 
503 richard 391
# On autorise les requêtes DNS vers les serveurs DNS identifiés 
498 richard 392
# Allow DNS requests to identified DNS servers
393
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 394
 
615 richard 395
# On autorise les requêtes HTTP sortantes
498 richard 396
# HTTP requests are allowed
1159 crox53 397
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
498 richard 398
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 399
 
784 richard 400
# On autorise les requêtes FTP 
401
# FTP requests are allowed
402
modprobe ip_conntrack_ftp
403
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
1159 crox53 404
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
784 richard 405
 
615 richard 406
# On autorise les requêtes NTP 
498 richard 407
# NTP requests are allowed
408
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 409
 
503 richard 410
# On autorise les requêtes ICMP (ping) 
411
# ICMP (ping) requests are allowed
412
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 413
 
615 richard 414
# On autorise les requêtes LDAP si un serveur externe est configué
415
# LDAP requests are allowed if an external server is declared
416
if [ $LDAP = on ]
417
	then
694 franck 418
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
419
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
615 richard 420
fi
783 richard 421
 
422
#############################
423
#       POSTROUTING         #
424
#############################
498 richard 425
# Traduction dynamique d'adresse en sortie
476 richard 426
# Dynamic NAT on EXTIF
1 root 427
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
428
 
476 richard 429
# End of script
1 root 430