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872 richard 1 
#!/bin/bash
64 franck 2 
# $Id: alcasar-iptables.sh 1472 2014-11-03 17:56:00Z 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
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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.
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= $CONF_FILE|cut -d"=" -f2`
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private_ip_mask=${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`
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 
 
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
1393 richard 96 
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
1459 franck 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
1453 franck 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 
 
1472 richard 152 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 (DNS-blacklist) pour pouvoir les rejeter en INPUT
153 
# Mark (and log) the udp 54 direct attempts (DNS-blacklist) to REJECT them in INPUT rules
783 richard 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 
 
1472 richard 157 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 55 (DNS-Whitelist) pour pouvoir les rejeter en INPUT
158 
# Mark (and log) the udp 55 direct attempts (DNS-whitelist) to REJECT them in INPUT rules
1364 richard 159 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 55 -j MARK --set-mark 3
783 richard 160 
 
1472 richard 161 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 56 (DNS-Blackhole) pour pouvoir les rejeter en INPUT
162 
# Mark (and log) the udp 55 direct attempts (DNS-whitelist) to REJECT them in INPUT rules
163 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 56 -j MARK --set-mark 4
164 
 
1364 richard 165 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8090 pour pouvoir les rejeter en INPUT
166 
# Mark (and log) the 8090 direct attempts to REJECT them in INPUT rules
1472 richard 167 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8090 -j MARK --set-mark 5
1294 richard 168 
 
1377 richard 169 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8091 pour pouvoir les rejeter en INPUT
170 
# Mark (and log) the 8091 direct attempts to REJECT them in INPUT rules
1472 richard 171 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8091 -j MARK --set-mark 6
1377 richard 172 
 
1364 richard 173 
# havp_bl_set --> redirection vers le port 54
174 
# havp_bl_set --> redirect to port 54
175 
$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 176 
 
1364 richard 177 
# havp_wl_set --> redirection vers le port 55
178 
# havp_wl_set --> redirect to port 55
179 
$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
180 
 
181 
# Redirection des requêtes HTTP des IP de la blacklist vers ALCASAR (page 'accès interdit') pour le set havp_bl_set
1393 richard 182 
# Redirect outbound HTTP requests from blacklist IP to ALCASAR ('access denied' page) for the set havp_bl_set
1364 richard 183 
$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
184 
 
1393 richard 185 
# Redirection des requêtes HTTP des IP qui ne sont pas dans la whitelist vers ALCASAR (page 'accès interdit') pour le set havp_wl_set
186 
# Redirect outbound HTTP requests from IP which are not in the whitelist to ALCASAR ('access denied' page) for the set havp_wl_set
187 
$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
188 
 
1291 richard 189 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
190 
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
1230 crox53 191 
$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 192 
 
1377 richard 193 
# Redirection des requêtes HTTP sortantes vers HAVP (8091) pour le set havp_set
194 
# Redirect outbound HTTP requests to HAVP (8091) for the set havp_set
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 8091
783 richard 196 
 
1364 richard 197 
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent) pour le set havp_bl_set
198 
# Redirect outbound HTTP requests to DansGuardian (transparent proxy) for the set havp_bl_set
199 
$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
200 
 
201 
# Redirection des requêtes HTTP sortantes vers HAVP pour le set havp_wl_set
202 
# Redirect outbound HTTP requests to HAVP for the set havp_wl_set
1377 richard 203 
$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 204 
 
783 richard 205 
# Redirection des requêtes NTP vers le serveur NTP local
206 
# Redirect NTP request in local NTP server
207 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
208 
 
472 richard 209 
#############################
783 richard 210 
#         INPUT             #
472 richard 211 
#############################
871 richard 212 
 
783 richard 213 
# Tout passe sur loopback
214 
# accept all on loopback
215 
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 216 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 217 
 
218 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
219 
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
472 richard 220 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
221 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
222 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
223 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
675 richard 224 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
498 richard 225 
 
871 richard 226 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
227 
# Drop broadcast & multicast on EXTIF to avoid log
783 richard 228 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 229 
 
1453 franck 230 
# On rejette les trames marquées dans PREROUTING MANGLE sur marqueur HTTP/header mark 3
231 
# Tagged frames are discarded in PREROUTING MANGLE over HTTP/header marker mark 3
1459 franck 232 
#$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m mark --mark 10 -j REJECT --reject-with tcp-reset
1453 franck 233 
 
783 richard 234 
# On autorise les retours de connexions légitimes par INPUT
235 
# Conntrack on INPUT
236 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
373 richard 237 
 
1221 richard 238 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
239 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
783 richard 240 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 241 
 
783 richard 242 
# Autorisation des connexions légitimes à DansGuardian
243 
# Allow connections for DansGuardian
244 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
373 richard 245 
 
1472 richard 246 
# On interdit les connexions directes au port UDP 54 (DNS-blacklist). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
247 
# Deny direct connections on UDP 54 (DNS-blacklist). The concerned paquets are marked in mangle table (PREROUTING)
1364 richard 248 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
791 richard 249 
 
1472 richard 250 
# On interdit les connexions directes au port UDP 55 (DNS-whitelist). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
251 
# Deny direct connections on UDP 55 (DNS-whitelist). The concerned paquets are marked in mangle table (PREROUTING)
1364 richard 252 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 55 -m mark --mark 3 -j REJECT --reject-with icmp-port-unreachable
253 
 
1472 richard 254 
# On interdit les connexions directes au port UDP 56 (DNS-Blackhole). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
255 
# Deny direct connections on UDP 56 (DNS-blackhole). The concerned paquets are marked in mangle table (PREROUTING)
256 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 56 -m mark --mark 4 -j REJECT --reject-with icmp-port-unreachable
257 
 
1364 richard 258 
# On interdit les connexions directes au port 8090. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
259 
# Deny direct connections on 8090. The concerned paquets are marked in mangle table (PREROUTING)
1472 richard 260 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8090 -m mark --mark 5 -j REJECT --reject-with tcp-reset
1364 richard 261 
 
1377 richard 262 
# On interdit les connexions directes au port 8091. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
263 
# Deny direct connections on 8091. The concerned paquets are marked in mangle table (PREROUTING)
1472 richard 264 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8091 -m mark --mark 6 -j REJECT --reject-with tcp-reset
1377 richard 265 
 
1364 richard 266 
# Autorisation des connexions légitimes à HAVP
267 
# Allow connections for HAVP
268 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8090 -m state --state NEW --syn -j ACCEPT
269 
 
1377 richard 270 
# Autorisation des connexions légitimes à HAVP
271 
# Allow connections for HAVP
272 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8091 -m state --state NEW --syn -j ACCEPT
273 
 
1364 richard 274 
# autorisation des connexion légitime à DNSMASQ (avec blacklist)
275 
# Allow connections for DNSMASQ (with blacklist)
783 richard 276 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
277 
 
1364 richard 278 
# autorisation des connexion légitime à DNSMASQ (avec whitelist)
279 
# Allow connections for DNSMASQ (with whitelist)
280 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT
281 
 
1472 richard 282 
# autorisation des connexion légitime à DNSMASQ (mode blackhole)
283 
# Allow connections for DNSMASQ (blackhole mode)
284 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 56 -j ACCEPT
285 
 
783 richard 286 
# Accès direct aux services internes
287 
# Internal services access
1364 richard 288 
$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 289 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
290 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
291 
$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
292 
$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
293 
$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
294 
$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 295 
 
296 
# SSHD rules if activate
297 
if [ $SSH = on ]
520 richard 298 
	then
783 richard 299 
	$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"
300 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
1063 richard 301 
	$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 302 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
520 richard 303 
fi
783 richard 304 
 
305 
# Insertion de règles locales
306 
# Here, we add local rules (i.e. VPN from Internet)
307 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
308 
        . /usr/local/etc/alcasar-iptables-local.sh
309 
fi
310 
 
311 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
312 
# Deny and log on INPUT from the LAN
313 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
314 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
315 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
316 
 
1393 richard 317 
# Interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
783 richard 318 
# Reject INTIF access (only when chilli is down)
319 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
320 
$IPTABLES -A INPUT -i $INTIF -j REJECT
321 
 
322 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
323 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
324 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
325 
 
326 
#############################
327 
#        FORWARD            #
328 
#############################
329 
 
1364 richard 330 
# Blocage des IPs du SET blacklist_ip_blocked pour le SET havp_bl_set
331 
# Deny IPs of the SET blacklist_ip_blocked for the set havp_bl_set
332 
$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
333 
$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
334 
$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
335 
 
783 richard 336 
# Rejet des requêtes DNS vers Internet
337 
# Deny forward DNS
338 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
339 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
340 
 
815 richard 341 
# Autorisation des retours de connexions légitimes
342 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 343 
 
1364 richard 344 
#  If protocols filter is activate
345 
#if [ $PROTOCOLS_FILTERING = on ]; then
346 
#	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
347 
#	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
348 
#	if [ $nb_uamallowed != "0" ]
349 
#	then
350 
#		while read ip_allowed_line
351 
#		do
352 
#			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
1221 richard 353 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
1364 richard 354 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
355 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
356 
#		done < /usr/local/etc/alcasar-uamallowed
357 
#	fi
358 
#	# Autorisation des protocoles non commentés
359 
#	# Allow non comment protocols
360 
#	while read svc_line
361 
#	do
362 
#		svc_on=`echo $svc_line|cut -b1`
363 
#		if [ $svc_on != "#" ]
364 
#		then
365 
#			svc_name=`echo $svc_line|cut -d" " -f1`
366 
#			svc_port=`echo $svc_line|cut -d" " -f2`
367 
#			if [ $svc_name = "icmp" ]
368 
#			then
369 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
370 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
371 
#			else
372 
#
1221 richard 373 
#				$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 374 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
375 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
1221 richard 376 
#				$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 377 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
378 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
379 
#			fi
380 
#		fi
381 
#	done < /usr/local/etc/alcasar-services
382 
#	# Rejet explicite des autres protocoles
383 
#	# reject the others protocols
1221 richard 384 
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
1364 richard 385 
#	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
386 
#	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
387 
#	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
388 
#fi
492 franck 389 
 
390 
#  If QOS is activate  #
612 richard 391 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
492 franck 392 
	. /usr/local/etc/alcasar-iptables-qos.sh
393 
fi
394 
 
498 richard 395 
# Autorisation des connections sortant du LAN
476 richard 396 
# Allow forward connections with log
1221 richard 397 
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
1159 crox53 398 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
859 richard 399 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
1 root 400 
 
783 richard 401 
#############################
402 
#         OUTPUT            #
403 
#############################
1159 crox53 404 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
405 
# Everything is allowed but traffic through outside network interface
498 richard 406 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 407 
 
503 richard 408 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
498 richard 409 
# Allow DNS requests to identified DNS servers
410 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 411 
 
615 richard 412 
# On autorise les requêtes HTTP sortantes
498 richard 413 
# HTTP requests are allowed
1159 crox53 414 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
498 richard 415 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 416 
 
784 richard 417 
# On autorise les requêtes FTP
418 
# FTP requests are allowed
419 
modprobe ip_conntrack_ftp
420 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
1159 crox53 421 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
784 richard 422 
 
615 richard 423 
# On autorise les requêtes NTP
498 richard 424 
# NTP requests are allowed
425 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 426 
 
503 richard 427 
# On autorise les requêtes ICMP (ping)
428 
# ICMP (ping) requests are allowed
429 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 430 
 
615 richard 431 
# On autorise les requêtes LDAP si un serveur externe est configué
432 
# LDAP requests are allowed if an external server is declared
433 
if [ $LDAP = on ]
434 
	then
694 franck 435 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
436 
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
615 richard 437 
fi
783 richard 438 
 
439 
#############################
440 
#       POSTROUTING         #
441 
#############################
498 richard 442 
# Traduction dynamique d'adresse en sortie
476 richard 443 
# Dynamic NAT on EXTIF
1 root 444 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
445 
 
476 richard 446 
# End of script
1 root 447