Subversion Repositories ALCASAR

Rev

Rev 1386 | Rev 1392 | 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 1390 2014-06-17 12:37:37Z 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.
675 richard 13 
# The bootps/dhcp (67) port is always open on tun0/eth1 by coova
612 richard 14 
conf_file="/usr/local/etc/alcasar.conf"
766 richard 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)
21 
public_ip_mask=`grep PUBLIC_IP= $conf_file|cut -d"=" -f2`		# ALCASAR WAN IP address
22 
PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1`
766 richard 23 
dns1=`grep DNS1= $conf_file|cut -d"=" -f2`				# first public DNS server
615 richard 24 
dns1=${dns1:=208.67.220.220}
766 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
766 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}
766 richard 30 
DNS_FILTERING=`grep DNS_FILTERING= $conf_file|cut -d"=" -f2`		# DNS and URLs filter (on/off)
615 richard 31 
DNS_FILTERING=${DNS_FILTERING:=off}
1332 richard 32 
BL_IP_CAT="/usr/local/share/iptables-bl-enabled"			# categories files of the BlackListed IP
1339 richard 33 
BL_IP_OSSI="/usr/local/share/iptables-bl/ossi"				# ossi categoty
1377 richard 34 
WL_IP_OSSI="/usr/local/share/ossi-ip-wl"				# ip of the whitelist
1364 richard 35 
TMP_users_set_save="/tmp/users_set_save"				# tmp file for backup users set
36 
TMP_set_save="/tmp/ipset_save"						# tmp file for blacklist and whitelist creation
783 richard 37 
QOS=`grep QOS= $conf_file|cut -d"=" -f2`				# QOS (on/off)
615 richard 38 
QOS=${QOS:=off}
783 richard 39 
SSH=`grep SSH= $conf_file|cut -d"=" -f2`				# sshd active (on/off)
615 richard 40 
SSH=${SSH:=off}
1063 richard 41 
SSH_ADMIN_FROM=`grep SSH_ADMIN_FROM= $conf_file|cut -d"=" -f2`
42 
SSH_ADMIN_FROM=${SSH_ADMIN_FROM:="0.0.0.0/0.0.0.0"}			# WAN IP address to reduce ssh access (all ip allowed on LAN side)
783 richard 43 
LDAP=`grep LDAP= $conf_file|cut -d"=" -f2`				# LDAP external server active (on/off)
615 richard 44 
LDAP=${LDAP:=off}
783 richard 45 
LDAP_IP=`grep LDAP_IP= $conf_file|cut -d"=" -f2`			# WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
768 richard 46 
LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
1377 richard 47 
EXTIF="enp1s0"
48 
INTIF="enp2s0"
783 richard 49 
TUNIF="tun0"								# listen device for chilli daemon
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
56 
ipset list no_filtering_set 1>/dev/null 2>&1
57 
if [ $? -eq 0 ];
58 
then
59 
	ipset save no_filtering_set > $TMP_users_set_save
60 
	ipset save havp_set >> $TMP_users_set_save
61 
	ipset save havp_bl_set >> $TMP_users_set_save
62 
	ipset save havp_wl_set >> $TMP_users_set_save
63 
fi
64 
 
1291 richard 65 
# loading of NetFlow probe (ipt_NETFLOW kernel module)
1159 crox53 66 
modprobe ipt_NETFLOW destination=127.0.0.1:2055
67 
 
498 richard 68 
# Effacement des règles existantes
476 richard 69 
# Flush all existing rules
1 root 70 
$IPTABLES -F
71 
$IPTABLES -t nat -F
72 
$IPTABLES -t mangle -F
73 
$IPTABLES -F INPUT
74 
$IPTABLES -F FORWARD
75 
$IPTABLES -F OUTPUT
76 
 
498 richard 77 
# Suppression des chaines utilisateurs sur les tables filter et nat
78 
# Flush non default rules on filter and nat tables
79 
$IPTABLES -X
80 
$IPTABLES -t nat -X
81 
 
82 
# Stratégies par défaut
476 richard 83 
# Default policies
1 root 84 
$IPTABLES -P INPUT DROP
85 
$IPTABLES -P FORWARD DROP
498 richard 86 
$IPTABLES -P OUTPUT DROP
1 root 87 
$IPTABLES -t nat -P PREROUTING ACCEPT
88 
$IPTABLES -t nat -P POSTROUTING ACCEPT
89 
$IPTABLES -t nat -P OUTPUT ACCEPT
90 
 
1291 richard 91 
# destruction de tous les SET
1332 richard 92 
# destroy all SET
1291 richard 93 
ipset destroy
94 
 
1377 richard 95 
# Calcul de la taille du set de la blacklist
96 
# Compute the blacklist set length
1332 richard 97 
cd $BL_IP_CAT
1364 richard 98 
set_bl_length=$(($(wc -l * | awk '{print $1}' | tail -n 1)+$(wc -l $BL_IP_OSSI | awk '{print $1}')))
1294 richard 99 
 
1339 richard 100 
# Création du fichier set temporaire, remplissage, chargement et suppression
1377 richard 101 
# Creating the temporary set file, filling, loading and deleting
1364 richard 102 
echo "create blacklist_ip_blocked hash:net family inet hashsize 1024 maxelem $set_bl_length" > $TMP_set_save
1332 richard 103 
for category in `ls -1 | cut -d '@' -f1`
104 
do
1364 richard 105 
	cat $BL_IP_CAT/$category >> $TMP_set_save
1332 richard 106 
done
1364 richard 107 
cat $BL_IP_OSSI >> $TMP_set_save
108 
ipset -! restore < $TMP_set_save
109 
rm -f $TMP_set_save
1332 richard 110 
 
1339 richard 111 
# Extraction des ip réhabilitées
1377 richard 112 
# Extracting rehabilitated ip
1339 richard 113 
for ip in $(cat $IP_REHABILITEES)
114 
do
115 
	ipset del blacklist_ip_blocked $ip
116 
done
117 
 
1364 richard 118 
# Création du fichier set temporaire, remplissage, chargement et suppression
1377 richard 119 
# Creating the temporary set file, filling, loading and deleting
1390 richard 120 
echo "create whitelist_ip_allowed hash:net family inet hashsize 1024" > $TMP_set_save
1377 richard 121 
cat $WL_IP_OSSI >> $TMP_set_save
1364 richard 122 
ipset -! restore < $TMP_set_save
123 
rm -f $TMP_set_save
124 
 
125 
# Restoration des SET des utilisateurs connectés si ils existent sinon création des SET
1377 richard 126 
# Restoring the connected users SETs if available, otherwise creating SETs
1364 richard 127 
if [ -e $TMP_users_set_save ];
128 
then
129 
	ipset -! restore < $TMP_users_set_save
130 
	rm -f $TMP_users_set_save
131 
else
132 
	ipset create no_filtering_set hash:net hashsize 1024
133 
	ipset create havp_set hash:net hashsize 1024
134 
	ipset create havp_bl_set hash:net hashsize 1024
135 
	ipset create havp_wl_set hash:net hashsize 1024
136 
fi
137 
 
472 richard 138 
#############################
783 richard 139 
#       PREROUTING          #
472 richard 140 
#############################
783 richard 141 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT
142 
# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
1221 richard 143 
$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 144 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
1 root 145 
 
783 richard 146 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT
147 
# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules
148 
# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "
149 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2
150 
 
1364 richard 151 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 55 pour pouvoir les rejeter en INPUT
152 
# Mark (and log) the udp 55 direct attempts to REJECT them in INPUT rules
153 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 55 -j MARK --set-mark 3
783 richard 154 
 
1364 richard 155 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8090 pour pouvoir les rejeter en INPUT
156 
# Mark (and log) the 8090 direct attempts to REJECT them in INPUT rules
157 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8090 -j MARK --set-mark 4
1294 richard 158 
 
1377 richard 159 
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8091 pour pouvoir les rejeter en INPUT
160 
# Mark (and log) the 8091 direct attempts to REJECT them in INPUT rules
161 
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8091 -j MARK --set-mark 5
162 
 
1364 richard 163 
# Aiguillage des flux DNS
164 
# Switching DNS streams
165 
# havp_bl_set --> redirection vers le port 54
166 
# havp_bl_set --> redirect to port 54
167 
$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
168 
# havp_wl_set --> redirection vers le port 55
169 
# havp_wl_set --> redirect to port 55
170 
$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
171 
 
172 
# Redirection des requêtes HTTP des IP de la blacklist vers ALCASAR (page 'accès interdit') pour le set havp_bl_set
173 
$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
174 
 
1291 richard 175 
# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow
176 
## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow
1230 crox53 177 
$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 178 
 
1377 richard 179 
# Redirection des requêtes HTTP sortantes vers HAVP (8091) pour le set havp_set
180 
# Redirect outbound HTTP requests to HAVP (8091) for the set havp_set
181 
$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 182 
 
1364 richard 183 
# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent) pour le set havp_bl_set
184 
# Redirect outbound HTTP requests to DansGuardian (transparent proxy) for the set havp_bl_set
185 
$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
186 
 
187 
# Redirection des requêtes HTTP sortantes vers HAVP pour le set havp_wl_set
188 
# Redirect outbound HTTP requests to HAVP for the set havp_wl_set
1377 richard 189 
$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 190 
 
783 richard 191 
# Redirection des requêtes NTP vers le serveur NTP local
192 
# Redirect NTP request in local NTP server
193 
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
194 
 
472 richard 195 
#############################
783 richard 196 
#         INPUT             #
472 richard 197 
#############################
871 richard 198 
 
783 richard 199 
# Tout passe sur loopback
200 
# accept all on loopback
201 
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 202 
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 203 
 
204 
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
205 
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
472 richard 206 
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
207 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
208 
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
209 
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
675 richard 210 
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
498 richard 211 
 
871 richard 212 
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
213 
# Drop broadcast & multicast on EXTIF to avoid log
783 richard 214 
$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 215 
 
783 richard 216 
# On autorise les retours de connexions légitimes par INPUT
217 
# Conntrack on INPUT
218 
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
373 richard 219 
 
1221 richard 220 
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
221 
# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)
783 richard 222 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
791 richard 223 
 
783 richard 224 
# Autorisation des connexions légitimes à DansGuardian
225 
# Allow connections for DansGuardian
226 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
373 richard 227 
 
783 richard 228 
# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
229 
# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)
1364 richard 230 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable
791 richard 231 
 
1364 richard 232 
# On interdit les connexions directes au port UDP 55. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
233 
# Deny direct connections on UDP 55. The concerned paquets are marked in mangle table (PREROUTING)
234 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 55 -m mark --mark 3 -j REJECT --reject-with icmp-port-unreachable
235 
 
236 
# On interdit les connexions directes au port 8090. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
237 
# Deny direct connections on 8090. The concerned paquets are marked in mangle table (PREROUTING)
238 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8090 -m mark --mark 4 -j REJECT --reject-with tcp-reset
239 
 
1377 richard 240 
# On interdit les connexions directes au port 8091. Les packets concernés ont été marqués dans la table mangle (PREROUTING)
241 
# Deny direct connections on 8091. The concerned paquets are marked in mangle table (PREROUTING)
242 
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8091 -m mark --mark 5 -j REJECT --reject-with tcp-reset
243 
 
1364 richard 244 
# Autorisation des connexions légitimes à HAVP
245 
# Allow connections for HAVP
246 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8090 -m state --state NEW --syn -j ACCEPT
247 
 
1377 richard 248 
# Autorisation des connexions légitimes à HAVP
249 
# Allow connections for HAVP
250 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8091 -m state --state NEW --syn -j ACCEPT
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 
 
783 richard 260 
# Accès direct aux services internes
261 
# Internal services access
1364 richard 262 
$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 263 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
264 
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
265 
$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
266 
$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
267 
$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
268 
$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 269 
 
270 
# SSHD rules if activate
271 
if [ $SSH = on ]
520 richard 272 
	then
783 richard 273 
	$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"
274 
	$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
1063 richard 275 
	$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 276 
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
520 richard 277 
fi
783 richard 278 
 
279 
# Insertion de règles locales
280 
# Here, we add local rules (i.e. VPN from Internet)
281 
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
282 
        . /usr/local/etc/alcasar-iptables-local.sh
283 
fi
284 
 
285 
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
286 
# Deny and log on INPUT from the LAN
287 
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "
288 
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
289 
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
290 
 
291 
# interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
292 
# Reject INTIF access (only when chilli is down)
293 
$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "
294 
$IPTABLES -A INPUT -i $INTIF -j REJECT
295 
 
296 
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
297 
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
298 
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"
299 
 
300 
#############################
301 
#        FORWARD            #
302 
#############################
303 
 
1364 richard 304 
# Blocage des IPs du SET blacklist_ip_blocked pour le SET havp_bl_set
305 
# Deny IPs of the SET blacklist_ip_blocked for the set havp_bl_set
306 
$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
307 
$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
308 
$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
309 
 
783 richard 310 
# Rejet des requêtes DNS vers Internet
311 
# Deny forward DNS
312 
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
313 
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
314 
 
815 richard 315 
# Autorisation des retours de connexions légitimes
316 
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
790 richard 317 
 
1364 richard 318 
#  If protocols filter is activate
319 
#if [ $PROTOCOLS_FILTERING = on ]; then
320 
#	# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
321 
#	nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
322 
#	if [ $nb_uamallowed != "0" ]
323 
#	then
324 
#		while read ip_allowed_line
325 
#		do
326 
#			ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
1221 richard 327 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
1364 richard 328 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
329 
#			$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
330 
#		done < /usr/local/etc/alcasar-uamallowed
331 
#	fi
332 
#	# Autorisation des protocoles non commentés
333 
#	# Allow non comment protocols
334 
#	while read svc_line
335 
#	do
336 
#		svc_on=`echo $svc_line|cut -b1`
337 
#		if [ $svc_on != "#" ]
338 
#		then
339 
#			svc_name=`echo $svc_line|cut -d" " -f1`
340 
#			svc_port=`echo $svc_line|cut -d" " -f2`
341 
#			if [ $svc_name = "icmp" ]
342 
#			then
343 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
344 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
345 
#			else
346 
#
1221 richard 347 
#				$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 348 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
349 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
1221 richard 350 
#				$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 351 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
352 
#				$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
353 
#			fi
354 
#		fi
355 
#	done < /usr/local/etc/alcasar-services
356 
#	# Rejet explicite des autres protocoles
357 
#	# reject the others protocols
1221 richard 358 
#	$IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
1364 richard 359 
#	$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
360 
#	$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
361 
#	$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
362 
#fi
492 franck 363 
 
364 
#  If QOS is activate  #
612 richard 365 
if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then
492 franck 366 
	. /usr/local/etc/alcasar-iptables-qos.sh
367 
fi
368 
 
498 richard 369 
# Autorisation des connections sortant du LAN
476 richard 370 
# Allow forward connections with log
1221 richard 371 
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
1159 crox53 372 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
859 richard 373 
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
1 root 374 
 
783 richard 375 
#############################
376 
#         OUTPUT            #
377 
#############################
1159 crox53 378 
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
379 
# Everything is allowed but traffic through outside network interface
498 richard 380 
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 381 
 
503 richard 382 
# On autorise les requêtes DNS vers les serveurs DNS identifiés
498 richard 383 
# Allow DNS requests to identified DNS servers
384 
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
783 richard 385 
 
615 richard 386 
# On autorise les requêtes HTTP sortantes
498 richard 387 
# HTTP requests are allowed
1159 crox53 388 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
498 richard 389 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
783 richard 390 
 
784 richard 391 
# On autorise les requêtes FTP
392 
# FTP requests are allowed
393 
modprobe ip_conntrack_ftp
394 
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
1159 crox53 395 
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
784 richard 396 
 
615 richard 397 
# On autorise les requêtes NTP
498 richard 398 
# NTP requests are allowed
399 
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 400 
 
503 richard 401 
# On autorise les requêtes ICMP (ping)
402 
# ICMP (ping) requests are allowed
403 
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 404 
 
615 richard 405 
# On autorise les requêtes LDAP si un serveur externe est configué
406 
# LDAP requests are allowed if an external server is declared
407 
if [ $LDAP = on ]
408 
	then
694 franck 409 
	$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
410 
	$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
615 richard 411 
fi
783 richard 412 
 
413 
#############################
414 
#       POSTROUTING         #
415 
#############################
498 richard 416 
# Traduction dynamique d'adresse en sortie
476 richard 417 
# Dynamic NAT on EXTIF
1 root 418 
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
419 
 
476 richard 420 
# End of script
1 root 421