Subversion Repositories ALCASAR

Rev

Rev 1896 | Rev 1962 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log

Rev Author Line No. Line
872 richard 1
#!/bin/bash
64 franck 2
# $Id: alcasar-iptables.sh 1932 2016-06-09 21:36:47Z 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.
1469 richard 13
# The bootps/dhcp (67) port is always open on tun0/INTIF by coova 
14
CONF_FILE="/usr/local/etc/alcasar.conf"
1587 richard 15
EXTIF=`grep ^EXTIF= $CONF_FILE|cut -d"=" -f2`				# EXTernal InterFace
16
INTIF=`grep ^INTIF= $CONF_FILE|cut -d"=" -f2`				# INTernal InterFace
17
TUNIF="tun0"								# listen device for chilli daemon
1469 richard 18
private_ip_mask=`grep ^PRIVATE_IP= $CONF_FILE|cut -d"=" -f2`
615 richard 19
private_ip_mask=${private_ip_mask:=192.168.182.1/24}
783 richard 20
PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1`			# ALCASAR LAN IP address
604 richard 21
private_network=`/bin/ipcalc -n $private_ip_mask|cut -d"=" -f2`		# LAN IP address (ie.: 192.168.182.0)
22
private_prefix=`/bin/ipcalc -p $private_ip_mask|cut -d"=" -f2`		# LAN prefix (ie. 24)
783 richard 23
PRIVATE_NETWORK_MASK=$private_network/$private_prefix			# Lan IP address + prefix (192.168.182.0/24)
1469 richard 24
public_ip_mask=`grep ^PUBLIC_IP= $CONF_FILE|cut -d"=" -f2`		# ALCASAR WAN IP address
1585 richard 25
if [[ "$public_ip_mask" == "dhcp" ]]
26
then
27
	PTN="\b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\/([012]?[0-9]|3[0-2])\b"
1587 richard 28
	public_ip_mask=`ip addr show $EXTIF | egrep -o $PTN`
1585 richard 29
fi
783 richard 30
PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1`
1588 richard 31
dns1=`grep ^DNS1= $CONF_FILE|cut -d"=" -f2`
32
dns2=`grep ^DNS2= $CONF_FILE|cut -d"=" -f2`
615 richard 33
dns1=${dns1:=208.67.220.220}
34
dns2=${dns2:=208.67.222.222}
1585 richard 35
DNSSERVERS="$dns1,$dns2"						# first and second public DNS servers
1469 richard 36
PROTOCOLS_FILTERING=`grep ^PROTOCOLS_FILTERING= $CONF_FILE|cut -d"=" -f2`	# Network protocols filter (on/off)
615 richard 37
PROTOCOLS_FILTERING=${PROTOCOLS_FILTERING:=off}
1332 richard 38
BL_IP_CAT="/usr/local/share/iptables-bl-enabled"			# categories files of the BlackListed IP
1932 richard 39
WL_IP_CAT="/usr/local/share/iptables-wl-enabled"			# categories files of the WhiteListed IP
1364 richard 40
TMP_users_set_save="/tmp/users_set_save"				# tmp file for backup users set 
41
TMP_set_save="/tmp/ipset_save"						# tmp file for blacklist and whitelist creation
1469 richard 42
SSH=`grep ^SSH= $CONF_FILE|cut -d"=" -f2`				# sshd active (on/off)
615 richard 43
SSH=${SSH:=off}
1469 richard 44
SSH_ADMIN_FROM=`grep ^SSH_ADMIN_FROM= $CONF_FILE|cut -d"=" -f2`
1063 richard 45
SSH_ADMIN_FROM=${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 46
LDAP=`grep ^LDAP= $CONF_FILE|cut -d"=" -f2`				# LDAP external server active (on/off)
615 richard 47
LDAP=${LDAP:=off}
1469 richard 48
LDAP_IP=`grep ^LDAP_IP= $CONF_FILE|cut -d"=" -f2`			# WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
768 richard 49
LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
612 richard 50
IPTABLES="/sbin/iptables"
1339 richard 51
IP_REHABILITEES="/etc/dansguardian/lists/exceptioniplist"		# Rehabilitated IP
1364 richard 52
SAVE_DIR="/etc/sysconfig"						# Saving path
1 root 53
 
1364 richard 54
# Sauvegarde des SET des utilisateurs connectés si ils existent
55
# Saving SET of connected users if it exists
1867 raphael.pi 56
ipset list not_filtered 1>/dev/null 2>&1
1364 richard 57
if [ $? -eq 0 ];
58
then
1867 raphael.pi 59
	ipset save not_filtered > $TMP_users_set_save
1872 richard 60
	ipset save havp >> $TMP_users_set_save
61
	ipset save havp_bl >> $TMP_users_set_save
62
	ipset save havp_wl >> $TMP_users_set_save
1867 raphael.pi 63
	ipset save not_auth_yet >> $TMP_users_set_save
64
	ipset save users_list >> $TMP_users_set_save
1364 richard 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
476 richard 85
# Default policies
1 root 86
$IPTABLES -P INPUT DROP
87
$IPTABLES -P FORWARD DROP
498 richard 88
$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
 
1484 richard 93
 
94
#############################
95
#          IPSET            #
96
#############################
97
 
1291 richard 98
# destruction de tous les SET
1332 richard 99
# destroy all SET
1876 raphael.pi 100
ipset flush
1291 richard 101
ipset destroy
1855 raphael.pi 102
 
1484 richard 103
###### BL set  ###########
104
# Calcul de la taille / Compute the length
1932 richard 105
bl_set_length=$(wc -l $BL_IP_CAT/* | awk '{print $1}' | tail -n 1)
1484 richard 106
# Chargement / loading
1867 raphael.pi 107
echo "create bl_ip_blocked hash:net family inet hashsize 1024 maxelem $bl_set_length" > $TMP_set_save
1393 richard 108
for category in `ls -1 $BL_IP_CAT | cut -d '@' -f1`
1332 richard 109
do
1364 richard 110
	cat $BL_IP_CAT/$category >> $TMP_set_save
1332 richard 111
done
1364 richard 112
ipset -! restore < $TMP_set_save
113
rm -f $TMP_set_save
1484 richard 114
# Suppression des ip réhabilitées / Removing of rehabilitated ip
1339 richard 115
for ip in $(cat $IP_REHABILITEES)
116
do
1867 raphael.pi 117
	ipset del bl_ip_blocked $ip
1339 richard 118
done
119
 
1484 richard 120
###### WL set  ###########
1932 richard 121
# taille fixe, car peupler par dnsmasq / fixe length due to dnsmasq dynamic loading
1896 raphael.pi 122
wl_set_length=65536
1484 richard 123
# Chargement Loading
1867 raphael.pi 124
echo "create wl_ip_allowed hash:net family inet hashsize 1024 maxelem $wl_set_length" > $TMP_set_save
1852 raphael.pi 125
#get ip-wl files from ACC
1932 richard 126
for category in `ls -1 $WL_IP_CAT |cut -d '@' -f1`
1852 raphael.pi 127
do
1932 richard 128
	cat $WL_IP_CAT/$category >> $TMP_set_save
1852 raphael.pi 129
done
1364 richard 130
ipset -! restore < $TMP_set_save
131
rm -f $TMP_set_save
132
 
133
# Restoration des SET des utilisateurs connectés si ils existent sinon création des SET 
1377 richard 134
# Restoring the connected users SETs if available, otherwise creating SETs
1364 richard 135
if [ -e $TMP_users_set_save ];
136
then
137
	ipset -! restore < $TMP_users_set_save
138
	rm -f $TMP_users_set_save
139
else
1867 raphael.pi 140
	ipset create not_filtered hash:net hashsize 1024
1872 richard 141
	ipset create havp hash:net hashsize 1024
142
	ipset create havp_bl hash:net hashsize 1024
143
	ipset create havp_wl hash:net hashsize 1024
1818 raphael.pi 144
	#utilisé pour l'interception des utilisateurs non authentifiés au réseau
145
	#used for intercepting users not connected to the network
1867 raphael.pi 146
	ipset create not_auth_yet hash:net hashsize 1024
147
	ipset create users_list list:set
1872 richard 148
	ipset add users_list havp
149
	ipset add users_list havp_wl
150
	ipset add users_list havp_bl
1867 raphael.pi 151
	ipset add users_list not_filtered
152
	ipset add users_list not_auth_yet
1364 richard 153
fi
154
 
472 richard 155
#############################
783 richard 156
#       PREROUTING          #
472 richard 157
#############################
1827 raphael.pi 158
 
159
# Redirection des requetes DNS des utilisateurs non connectés dans le DNS-Blackhole
160
# Redirect users not connected DNS requests in DNS-Blackhole
1867 raphael.pi 161
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set ! --match-set users_list src -d $PRIVATE_IP -p tcp --dport domain -j REDIRECT --to-port 56
162
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set ! --match-set users_list src -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 56
1827 raphael.pi 163
 
164
 
1453 franck 165
# Marquage des paquets qui tentent d'accéder directement à un serveur sans authentification en mode proxy pour pouvoir les rejeter en INPUT
166
# Mark packets that attempt to directly access a server without authentication with proxy client to reject them in INPUT rules
1459 franck 167
#$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 168
 
1486 richard 169
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au 8080 (DansGuardian) pour pouvoir les rejeter en INPUT
783 richard 170
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
1731 richard 171
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j NFLOG --nflog-prefix "RULE direct-proxy -- DENY "
783 richard 172
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
1 root 173
 
1486 richard 174
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8090 (tinyproxy) pour pouvoir les rejeter en INPUT
175
# Mark (and log) the 8090 direct attempts to REJECT them in INPUT rules
1704 richard 176
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8090 -j NFLOG --nflog-prefix "RULE direct-proxy -- DENY "
1486 richard 177
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8090 -j MARK --set-mark 2
178
 
1484 richard 179
# Marquage des paquets qui tentent d'accéder directement au port udp 54 (DNS-blacklist) pour pouvoir les rejeter en INPUT
180
# Mark the udp 54 direct attempts (DNS-blacklist) to REJECT them in INPUT rules
1486 richard 181
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 3
783 richard 182
 
1484 richard 183
# Marquage des paquets qui tentent d'accéder directement au port udp 55 (DNS-Whitelist) pour pouvoir les rejeter en INPUT
184
# Mark the udp 55 direct attempts (DNS-whitelist) to REJECT them in INPUT rules
1486 richard 185
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 55 -j MARK --set-mark 4
783 richard 186
 
1484 richard 187
# Marquage des paquets qui tentent d'accéder directement au port udp 56 (DNS-Blackhole) pour pouvoir les rejeter en INPUT
188
# Mark the udp 56 direct attempts (DNS-blackhole) to REJECT them in INPUT rules
1486 richard 189
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 56 -j MARK --set-mark 5
1472 richard 190
 
1544 richard 191
# redirection DNS des usagers 'havp_bl' vers le port 54
192
# redirect DNS of 'havp_bl' users to port 54
1872 richard 193
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl src -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
1393 richard 194
 
1544 richard 195
# redirection DNS des usagers 'havp_wl' vers le port 55
1872 richard 196
# redirect DNS of 'havp_wl' users to port 55
197
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl src -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 55
1364 richard 198
 
1544 richard 199
# Journalisation HTTP_Internet des usagers 'havp_bl' (paquets SYN uniquement). Les autres protocoles sont journalisés en FORWARD par netflow. 
200
# Log Internet HTTP of 'havp_bl' users" (only syn packets). Other protocols are logged in FORWARD by netflow
1872 richard 201
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl src ! -d $PRIVATE_IP -p tcp --dport http -m state --state NEW -j NFLOG --nflog-prefix "RULE F_http -- ACCEPT "
1544 richard 202
 
203
# Redirection HTTP des usagers 'havp_bl' cherchant à joindre les IP de la blacklist vers ALCASAR (page 'accès interdit')
204
# Redirect HTTP of 'havp_bl' users who want blacklist IP to ALCASAR ('access denied' page)
1872 richard 205
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl src -m set --match-set bl_ip_blocked dst -p tcp --dport http -j REDIRECT --to-port 80
1364 richard 206
 
1544 richard 207
# Redirection HTTP des usagers 'havp_wl' cherchant à joindre les IP qui ne sont pas dans la WL vers ALCASAR (page 'accès interdit')
208
# Redirect HTTP of 'havp_wl' users who want IP not in the WL to ALCASAR ('access denied' page)
1872 richard 209
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl src -m set ! --match-set wl_ip_allowed dst -p tcp --dport http -j REDIRECT --to-port 80
1393 richard 210
 
1544 richard 211
# Redirection des requêtes HTTP sortantes des usagers 'havp_bl' vers DansGuardian
1484 richard 212
# Redirect outbound HTTP requests of "BL" users to DansGuardian (transparent proxy)
1872 richard 213
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
1484 richard 214
 
1544 richard 215
# Redirection des requêtes HTTP sortantes des usager 'havp_wl' et 'havp' vers Tinyproxy
1486 richard 216
# Redirect outbound HTTP requests for "WL-antivirus" users to Tinyproxy
1872 richard 217
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8090
218
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8090
1364 richard 219
 
783 richard 220
# Redirection des requêtes NTP vers le serveur NTP local
221
# Redirect NTP request in local NTP server
222
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
223
 
472 richard 224
#############################
783 richard 225
#         INPUT             #
472 richard 226
#############################
871 richard 227
 
783 richard 228
# Tout passe sur loopback
229
# accept all on loopback
230
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 231
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 232
 
233
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
234
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
472 richard 235
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
236
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
237
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
238
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
675 richard 239
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
498 richard 240
 
1587 richard 241
# Si configéré, on autorise les réponses DHCP 
242
# Allow DHCP answers if configured
243
public_ip_mask=`grep ^PUBLIC_IP= $CONF_FILE|cut -d"=" -f2`		# ALCASAR WAN IP address
244
if [[ "$public_ip_mask" == "dhcp" ]]
245
then
246
	$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport 68 -j ACCEPT
247
	$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport 68 -j ACCEPT
248
fi
871 richard 249
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
250
# Drop broadcast & multicast on EXTIF to avoid log 
1629 richard 251
$IPTABLES -A INPUT -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 252
 
783 richard 253
# On autorise les retours de connexions légitimes par INPUT
254
# Conntrack on INPUT
255
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
373 richard 256
 
1221 richard 257
# 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 258
# Deny direct connections on DansGuardian port (8080). The concerned paquets have been marked and logged in mangle table (PREROUTING)
783 richard 259
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 260
 
783 richard 261
# Autorisation des connexions légitimes à DansGuardian 
262
# Allow connections for DansGuardian
263
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
373 richard 264
 
1486 richard 265
# On interdit les connexions directes au port utilisé par tinyproxy (8090). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
266
# Deny direct connections on tinyproxy port (8090). The concerned paquets have been marked in mangle table (PREROUTING)
267
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8090 -m mark --mark 2 -j REJECT --reject-with tcp-reset
268
 
269
# Autorisation des connexions légitimes vers tinyproxy 
270
# Allow connections to tinyproxy
271
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8090 -m state --state NEW --syn -j ACCEPT
272
 
1472 richard 273
# On interdit les connexions directes au port UDP 54 (DNS-blacklist). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
274
# Deny direct connections on UDP 54 (DNS-blacklist). The concerned paquets are marked in mangle table (PREROUTING)
1486 richard 275
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 54 -m mark --mark 3 -j REJECT --reject-with icmp-port-unreachable
791 richard 276
 
1472 richard 277
# On interdit les connexions directes au port UDP 55 (DNS-whitelist). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
278
# Deny direct connections on UDP 55 (DNS-whitelist). The concerned paquets are marked in mangle table (PREROUTING)
1486 richard 279
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 55 -m mark --mark 4 -j REJECT --reject-with icmp-port-unreachable
1364 richard 280
 
1472 richard 281
# On interdit les connexions directes au port UDP 56 (DNS-Blackhole). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
282
# Deny direct connections on UDP 56 (DNS-blackhole). The concerned paquets are marked in mangle table (PREROUTING)
1486 richard 283
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 56 -m mark --mark 5 -j REJECT --reject-with icmp-port-unreachable
1472 richard 284
 
1364 richard 285
# autorisation des connexion légitime à DNSMASQ (avec blacklist)
286
# Allow connections for DNSMASQ (with blacklist)
783 richard 287
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
288
 
1364 richard 289
# autorisation des connexion légitime à DNSMASQ (avec whitelist)
290
# Allow connections for DNSMASQ (with whitelist)
291
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT
292
 
1472 richard 293
# autorisation des connexion légitime à DNSMASQ (mode blackhole)
294
# Allow connections for DNSMASQ (blackhole mode)
295
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 56 -j ACCEPT
296
 
783 richard 297
# Accès direct aux services internes
298
# Internal services access
1364 richard 299
$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 300
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
301
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
302
$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
303
$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
304
$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
305
$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 306
 
307
# SSHD rules if activate 
308
if [ $SSH = on ]
520 richard 309
	then
1731 richard 310
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -m state --state NEW -j NFLOG --nflog-group 2 --nflog-prefix "RULE ssh-from-LAN -- ACCEPT"
783 richard 311
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
1731 richard 312
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW --syn -j NFLOG --nflog-group 2 --nflog-prefix "RULE ssh-from-WAN -- ACCEPT"
1161 richard 313
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
520 richard 314
fi
783 richard 315
 
316
# Insertion de règles locales
317
# Here, we add local rules (i.e. VPN from Internet)
318
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
319
        . /usr/local/etc/alcasar-iptables-local.sh
320
fi
321
 
322
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
323
# Deny and log on INPUT from the LAN
1704 richard 324
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j NFLOG --nflog-prefix "RULE rej-int -- REJECT "
783 richard 325
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
326
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
327
 
1393 richard 328
# Interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
783 richard 329
# Reject INTIF access (only when chilli is down)
1704 richard 330
$IPTABLES -A INPUT -i $INTIF -j NFLOG --nflog-prefix "RULE Protect1 -- REJECT "
783 richard 331
$IPTABLES -A INPUT -i $INTIF -j REJECT
332
 
333
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
334
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
1731 richard 335
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j NFLOG --nflog-group 3 --nflog-threshold 10 --nflog-prefix "RULE rej-ext -- DROP"
783 richard 336
 
337
#############################
338
#        FORWARD            #
339
#############################
340
 
1872 richard 341
# Blocage des IPs du SET bl_ip_blocked pour le SET havp_bl
342
# Deny IPs of the SET bl_ip_blocked for the set havp_bl
343
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set havp_bl src -m set --match-set bl_ip_blocked dst -p icmp -j REJECT --reject-with icmp-port-unreachable
344
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set havp_bl src -m set --match-set bl_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable
345
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set havp_bl src -m set --match-set bl_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset
1364 richard 346
 
783 richard 347
# Rejet des requêtes DNS vers Internet
348
# Deny forward DNS
349
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
350
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
351
 
815 richard 352
# Autorisation des retours de connexions légitimes
353
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 354
 
1364 richard 355
#  If protocols filter is activate
1488 richard 356
if [ $PROTOCOLS_FILTERING = on ]; then
357
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...) 
358
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
359
	if [ $nb_uamallowed != "0" ]
360
	then
361
		while read ip_allowed_line 
362
		do
363
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
1704 richard 364
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NFLOG --nflog-prefix "RULE IP-allowed -- ACCEPT "
1488 richard 365
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
366
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
367
		done < /usr/local/etc/alcasar-uamallowed
368
	fi
369
	# Autorisation du HTTP et des protocoles non commentés
370
	# Allow HTTP and non comment protocols
1704 richard 371
	$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport http -m state --state NEW -j NFLOG --nflog-prefix "RULE F_TCP-$svc_name -- ACCEPT "
1488 richard 372
	$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport http -m state --state NEW -j NETFLOW
373
	$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport http -m state --state NEW -j ACCEPT
374
	while read svc_line
375
	do
376
		svc_on=`echo $svc_line|cut -b1`
377
		if [ $svc_on != "#" ]
378
		then	
379
			svc_name=`echo $svc_line|cut -d" " -f1`
380
			svc_port=`echo $svc_line|cut -d" " -f2`
381
			if [ $svc_name = "icmp" ]
382
			then
383
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
384
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT 
385
			else
492 franck 386
 
1704 richard 387
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NFLOG --nflog-prefix "RULE F_TCP-$svc_name -- ACCEPT "
1488 richard 388
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
389
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
1704 richard 390
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NFLOG --nflog-prefix "RULE F_UDP-$svc_name -- ACCEPT "
1488 richard 391
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
392
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
393
			fi
394
		fi
395
	done < /usr/local/etc/alcasar-services
396
	# Rejet explicite des autres protocoles
397
	# reject the others protocols
1704 richard 398
	$IPTABLES -A FORWARD -i $TUNIF -j NFLOG --nflog-prefix "RULE F_filter -- REJECT "
1488 richard 399
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
400
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
401
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT 
402
fi
403
 
498 richard 404
# Autorisation des connections sortant du LAN  
476 richard 405
# Allow forward connections with log
1221 richard 406
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
1159 crox53 407
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
859 richard 408
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
1 root 409
 
783 richard 410
#############################
411
#         OUTPUT            #
412
#############################
1159 crox53 413
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
414
# Everything is allowed but traffic through outside network interface
498 richard 415
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 416
 
1587 richard 417
# Si configéré, on autorise les requêtes DHCP 
418
# Allow DHCP requests if configured
419
public_ip_mask=`grep ^PUBLIC_IP= $CONF_FILE|cut -d"=" -f2`		# ALCASAR WAN IP address
420
if [[ "$public_ip_mask" == "dhcp" ]]
421
then
422
	$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport 67 -j ACCEPT
423
	$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport 67 -j ACCEPT
424
fi
425
 
503 richard 426
# On autorise les requêtes DNS vers les serveurs DNS identifiés 
498 richard 427
# Allow DNS requests to identified DNS servers
428
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 429
 
615 richard 430
# On autorise les requêtes HTTP sortantes
498 richard 431
# HTTP requests are allowed
1159 crox53 432
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
498 richard 433
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 434
 
1862 raphael.pi 435
# On autorise les requêtes RSYNC sortantes (maj BL de Toulouse)
436
# RSYNC requests are allowed (to update BL of Toulouse)
437
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport rsync -j ACCEPT
438
 
784 richard 439
# On autorise les requêtes FTP 
440
# FTP requests are allowed
1705 richard 441
modprobe nf_conntrack_ftp
784 richard 442
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
1159 crox53 443
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
784 richard 444
 
615 richard 445
# On autorise les requêtes NTP 
498 richard 446
# NTP requests are allowed
447
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 448
 
503 richard 449
# On autorise les requêtes ICMP (ping) 
450
# ICMP (ping) requests are allowed
451
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 452
 
615 richard 453
# On autorise les requêtes LDAP si un serveur externe est configué
454
# LDAP requests are allowed if an external server is declared
455
if [ $LDAP = on ]
456
	then
694 franck 457
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
458
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
615 richard 459
fi
783 richard 460
 
461
#############################
462
#       POSTROUTING         #
463
#############################
498 richard 464
# Traduction dynamique d'adresse en sortie
476 richard 465
# Dynamic NAT on EXTIF
1 root 466
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
467
 
476 richard 468
# End of script
1 root 469