Subversion Repositories ALCASAR

Rev

Rev 1486 | Rev 1544 | 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 1488 2014-11-16 23:10:57Z 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"
15
private_ip_mask=`grep ^PRIVATE_IP= $CONF_FILE|cut -d"=" -f2`
615 richard 16
private_ip_mask=${private_ip_mask:=192.168.182.1/24}
783 richard 17
PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1`			# ALCASAR LAN IP address
604 richard 18
private_network=`/bin/ipcalc -n $private_ip_mask|cut -d"=" -f2`		# LAN IP address (ie.: 192.168.182.0)
19
private_prefix=`/bin/ipcalc -p $private_ip_mask|cut -d"=" -f2`		# LAN prefix (ie. 24)
783 richard 20
PRIVATE_NETWORK_MASK=$private_network/$private_prefix			# Lan IP address + prefix (192.168.182.0/24)
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`
1469 richard 23
dns1=`grep ^DNS1= $CONF_FILE|cut -d"=" -f2`				# first public DNS server
615 richard 24
dns1=${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}
783 richard 27
DNSSERVERS="$dns1,$dns2"						# first and second DNS IP servers addresses
1469 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
1469 richard 36
QOS=`grep ^QOS= $CONF_FILE|cut -d"=" -f2`				# QOS (on/off)
615 richard 37
QOS=${QOS:=off}
1469 richard 38
SSH=`grep ^SSH= $CONF_FILE|cut -d"=" -f2`				# sshd active (on/off)
615 richard 39
SSH=${SSH:=off}
1469 richard 40
SSH_ADMIN_FROM=`grep ^SSH_ADMIN_FROM= $CONF_FILE|cut -d"=" -f2`
1063 richard 41
SSH_ADMIN_FROM=${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= $CONF_FILE|cut -d"=" -f2`				# LDAP external server active (on/off)
615 richard 43
LDAP=${LDAP:=off}
1469 richard 44
LDAP_IP=`grep ^LDAP_IP= $CONF_FILE|cut -d"=" -f2`			# WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
768 richard 45
LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
1469 richard 46
EXTIF=`grep ^EXTIF= $CONF_FILE|cut -d"=" -f2`				# EXTernal InterFace
47
INTIF=`grep ^INTIF= $CONF_FILE|cut -d"=" -f2`				# INTernal InterFace
783 richard 48
TUNIF="tun0"								# listen device for chilli daemon
612 richard 49
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
476 richard 68
# 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
498 richard 85
$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
 
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
1393 richard 101
bl_set_length=$(($(wc -l $BL_IP_CAT/* | awk '{print $1}' | tail -n 1)+$(wc -l $BL_IP_OSSI | awk '{print $1}')))
1484 richard 102
# Chargement / loading
1393 richard 103
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
1484 richard 111
# 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))
1484 richard 120
# Chargement Loading
1393 richard 121
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 
1377 richard 127
# 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
#############################
783 richard 140
#       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
1221 richard 148
$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
153
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8090 -j MARK --set-mark 2
154
 
1484 richard 155
# Marquage des paquets qui tentent d'accéder directement au port udp 54 (DNS-blacklist) pour pouvoir les rejeter en INPUT
156
# Mark the udp 54 direct attempts (DNS-blacklist) to REJECT them in INPUT rules
1486 richard 157
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 3
783 richard 158
 
1484 richard 159
# Marquage des paquets qui tentent d'accéder directement au port udp 55 (DNS-Whitelist) pour pouvoir les rejeter en INPUT
160
# Mark the udp 55 direct attempts (DNS-whitelist) to REJECT them in INPUT rules
1486 richard 161
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 55 -j MARK --set-mark 4
783 richard 162
 
1484 richard 163
# Marquage des paquets qui tentent d'accéder directement au port udp 56 (DNS-Blackhole) pour pouvoir les rejeter en INPUT
164
# Mark the udp 56 direct attempts (DNS-blackhole) to REJECT them in INPUT rules
1486 richard 165
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 56 -j MARK --set-mark 5
1472 richard 166
 
1364 richard 167
# havp_bl_set --> redirection vers le port 54
168
# havp_bl_set --> redirect to port 54
169
$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 170
 
1364 richard 171
# havp_wl_set --> redirection vers le port 55
172
# havp_wl_set --> redirect to port 55
173
$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
174
 
1486 richard 175
# Redirection des requêtes HTTP des IP de la blacklist vers ALCASAR (page 'accès interdit') pour le set havp_bl_set 
1393 richard 176
# Redirect outbound HTTP requests from blacklist IP to ALCASAR ('access denied' page) for the set havp_bl_set
1364 richard 177
$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
178
 
1486 richard 179
# Resirection des requêtes HTTP vers les IP qui ne sont pas dans la WL. Redirection vers ALCASAR : page 'accès interdit'
1484 richard 180
# Redirect outbound HTTP requests to IP which are not in the WL. Redirection to ALCASAR : 'access denied' paae
1393 richard 181
$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
182
 
1484 richard 183
# Journalisation des requètes HTTP sortante des usagers "BL" (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
184
# Log HTTP requests to Internet of "BL users" (only syn packets) - Other protocols are logged in FORWARD by netflow
185
$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 "
1221 richard 186
 
1486 richard 187
# Redirection des requêtes HTTP sortantes des usagers "BL+antivirus" vers DansGuardian
1484 richard 188
# Redirect outbound HTTP requests of "BL" users to DansGuardian (transparent proxy)
189
$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
190
 
1486 richard 191
# Redirection des requêtes HTTP sortantes des usager "WL+antivirus" vers Tinyproxy
192
# Redirect outbound HTTP requests for "WL-antivirus" users to Tinyproxy
1484 richard 193
$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
1364 richard 194
 
783 richard 195
# Redirection des requêtes NTP vers le serveur NTP local
196
# Redirect NTP request in local NTP server
197
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
198
 
472 richard 199
#############################
783 richard 200
#         INPUT             #
472 richard 201
#############################
871 richard 202
 
783 richard 203
# Tout passe sur loopback
204
# accept all on loopback
205
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 206
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 207
 
208
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
209
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
472 richard 210
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
211
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
212
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
213
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
675 richard 214
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
498 richard 215
 
871 richard 216
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
217
# Drop broadcast & multicast on EXTIF to avoid log 
783 richard 218
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 219
 
783 richard 220
# On autorise les retours de connexions légitimes par INPUT
221
# Conntrack on INPUT
222
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
373 richard 223
 
1221 richard 224
# 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 225
# Deny direct connections on DansGuardian port (8080). The concerned paquets have been marked and logged in mangle table (PREROUTING)
783 richard 226
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 227
 
783 richard 228
# Autorisation des connexions légitimes à DansGuardian 
229
# Allow connections for DansGuardian
230
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
373 richard 231
 
1486 richard 232
# On interdit les connexions directes au port utilisé par tinyproxy (8090). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
233
# Deny direct connections on tinyproxy port (8090). The concerned paquets have been marked in mangle table (PREROUTING)
234
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8090 -m mark --mark 2 -j REJECT --reject-with tcp-reset
235
 
236
# Autorisation des connexions légitimes vers tinyproxy 
237
# Allow connections to tinyproxy
238
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8090 -m state --state NEW --syn -j ACCEPT
239
 
1472 richard 240
# On interdit les connexions directes au port UDP 54 (DNS-blacklist). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
241
# Deny direct connections on UDP 54 (DNS-blacklist). The concerned paquets are marked in mangle table (PREROUTING)
1486 richard 242
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 54 -m mark --mark 3 -j REJECT --reject-with icmp-port-unreachable
791 richard 243
 
1472 richard 244
# On interdit les connexions directes au port UDP 55 (DNS-whitelist). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
245
# Deny direct connections on UDP 55 (DNS-whitelist). The concerned paquets are marked in mangle table (PREROUTING)
1486 richard 246
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 55 -m mark --mark 4 -j REJECT --reject-with icmp-port-unreachable
1364 richard 247
 
1472 richard 248
# On interdit les connexions directes au port UDP 56 (DNS-Blackhole). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
249
# Deny direct connections on UDP 56 (DNS-blackhole). The concerned paquets are marked in mangle table (PREROUTING)
1486 richard 250
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 56 -m mark --mark 5 -j REJECT --reject-with icmp-port-unreachable
1472 richard 251
 
1364 richard 252
# autorisation des connexion légitime à DNSMASQ (avec blacklist)
253
# Allow connections for DNSMASQ (with blacklist)
783 richard 254
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
255
 
1364 richard 256
# autorisation des connexion légitime à DNSMASQ (avec whitelist)
257
# Allow connections for DNSMASQ (with whitelist)
258
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT
259
 
1472 richard 260
# autorisation des connexion légitime à DNSMASQ (mode blackhole)
261
# Allow connections for DNSMASQ (blackhole mode)
262
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 56 -j ACCEPT
263
 
783 richard 264
# Accès direct aux services internes
265
# Internal services access
1364 richard 266
$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 267
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
268
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
269
$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
270
$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
271
$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
272
$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 273
 
274
# SSHD rules if activate 
275
if [ $SSH = on ]
520 richard 276
	then
783 richard 277
	$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"
278
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
1063 richard 279
	$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 280
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
520 richard 281
fi
783 richard 282
 
283
# Insertion de règles locales
284
# Here, we add local rules (i.e. VPN from Internet)
285
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
286
        . /usr/local/etc/alcasar-iptables-local.sh
287
fi
288
 
289
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
290
# Deny and log on INPUT from the LAN
291
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
292
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
293
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
294
 
1393 richard 295
# Interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
783 richard 296
# Reject INTIF access (only when chilli is down)
297
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
298
$IPTABLES -A INPUT -i $INTIF -j REJECT
299
 
300
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
301
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
302
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
303
 
304
#############################
305
#        FORWARD            #
306
#############################
307
 
1364 richard 308
# Blocage des IPs du SET blacklist_ip_blocked pour le SET havp_bl_set
309
# Deny IPs of the SET blacklist_ip_blocked for the set havp_bl_set
310
$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
311
$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
312
$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
313
 
783 richard 314
# Rejet des requêtes DNS vers Internet
315
# Deny forward DNS
316
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
317
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
318
 
815 richard 319
# Autorisation des retours de connexions légitimes
320
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 321
 
1364 richard 322
#  If protocols filter is activate
1488 richard 323
if [ $PROTOCOLS_FILTERING = on ]; then
324
	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...) 
325
	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
326
	if [ $nb_uamallowed != "0" ]
327
	then
328
		while read ip_allowed_line 
329
		do
330
			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
331
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
332
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
333
			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
334
		done < /usr/local/etc/alcasar-uamallowed
335
	fi
336
	# Autorisation du HTTP et des protocoles non commentés
337
	# Allow HTTP and non comment protocols
338
	$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 "
339
	$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport http -m state --state NEW -j NETFLOW
340
	$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport http -m state --state NEW -j ACCEPT
341
	while read svc_line
342
	do
343
		svc_on=`echo $svc_line|cut -b1`
344
		if [ $svc_on != "#" ]
345
		then	
346
			svc_name=`echo $svc_line|cut -d" " -f1`
347
			svc_port=`echo $svc_line|cut -d" " -f2`
348
			if [ $svc_name = "icmp" ]
349
			then
350
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
351
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT 
352
			else
492 franck 353
 
1488 richard 354
				$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 "
355
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
356
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
357
				$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 "
358
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
359
				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
360
			fi
361
		fi
362
	done < /usr/local/etc/alcasar-services
363
	# Rejet explicite des autres protocoles
364
	# reject the others protocols
365
	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
366
	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
367
	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
368
	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT 
369
fi
370
 
492 franck 371
#  If QOS is activate  #
612 richard 372
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
492 franck 373
	. /usr/local/etc/alcasar-iptables-qos.sh 	
374
fi
375
 
498 richard 376
# Autorisation des connections sortant du LAN  
476 richard 377
# Allow forward connections with log
1221 richard 378
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
1159 crox53 379
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
859 richard 380
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
1 root 381
 
783 richard 382
#############################
383
#         OUTPUT            #
384
#############################
1159 crox53 385
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
386
# Everything is allowed but traffic through outside network interface
498 richard 387
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 388
 
503 richard 389
# On autorise les requêtes DNS vers les serveurs DNS identifiés 
498 richard 390
# Allow DNS requests to identified DNS servers
391
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 392
 
615 richard 393
# On autorise les requêtes HTTP sortantes
498 richard 394
# HTTP requests are allowed
1159 crox53 395
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
498 richard 396
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 397
 
784 richard 398
# On autorise les requêtes FTP 
399
# FTP requests are allowed
400
modprobe ip_conntrack_ftp
401
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
1159 crox53 402
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
784 richard 403
 
615 richard 404
# On autorise les requêtes NTP 
498 richard 405
# NTP requests are allowed
406
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 407
 
503 richard 408
# On autorise les requêtes ICMP (ping) 
409
# ICMP (ping) requests are allowed
410
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 411
 
615 richard 412
# On autorise les requêtes LDAP si un serveur externe est configué
413
# LDAP requests are allowed if an external server is declared
414
if [ $LDAP = on ]
415
	then
694 franck 416
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
417
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
615 richard 418
fi
783 richard 419
 
420
#############################
421
#       POSTROUTING         #
422
#############################
498 richard 423
# Traduction dynamique d'adresse en sortie
476 richard 424
# Dynamic NAT on EXTIF
1 root 425
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
426
 
476 richard 427
# End of script
1 root 428