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872 richard 1
#!/bin/bash
64 franck 2
# $Id: alcasar-iptables.sh 3103 2022-12-30 23:45:23Z rexy $
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);
2454 tom.houday 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.
2454 tom.houday 13
# The bootps/dhcp (67) port is always open on tun0/INTIF by coova
1469 richard 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 $private_ip_mask|cut -d"=" -f2`		# LAN prefix (ie. 24)
3043 rexy 23
PRIVATE_NETWORK_MASK=$private_network/$private_prefix			# LAN IP address + prefix (192.168.182.0/24)
1469 richard 24
public_ip_mask=`grep ^PUBLIC_IP= $CONF_FILE|cut -d"=" -f2`		# ALCASAR WAN IP address
3046 rexy 25
dhcp_on_extif="off"
1585 richard 26
if [[ "$public_ip_mask" == "dhcp" ]]
27
then
3046 rexy 28
	dhcp_on_extif="on"
1585 richard 29
	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 30
	public_ip_mask=`ip addr show $EXTIF | egrep -o $PTN`
1585 richard 31
fi
783 richard 32
PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1`
1588 richard 33
dns1=`grep ^DNS1= $CONF_FILE|cut -d"=" -f2`
34
dns2=`grep ^DNS2= $CONF_FILE|cut -d"=" -f2`
615 richard 35
dns1=${dns1:=208.67.220.220}
36
dns2=${dns2:=208.67.222.222}
1585 richard 37
DNSSERVERS="$dns1,$dns2"						# first and second public DNS servers
2688 lucas.echa 38
INT_DNS_IP=`grep INT_DNS_IP $CONF_FILE|cut -d"=" -f2`			# Adresse du serveur DNS interne
39
INT_DNS_ACTIVE=`grep INT_DNS_ACTIVE $CONF_FILE|cut -d"=" -f2`	# Activation de la redirection DNS interne
1332 richard 40
BL_IP_CAT="/usr/local/share/iptables-bl-enabled"			# categories files of the BlackListed IP
1932 richard 41
WL_IP_CAT="/usr/local/share/iptables-wl-enabled"			# categories files of the WhiteListed IP
2454 tom.houday 42
TMP_users_set_save="/tmp/users_set_save"				# tmp file for backup users set
1364 richard 43
TMP_set_save="/tmp/ipset_save"						# tmp file for blacklist and whitelist creation
2956 rexy 44
TMP_ip_gw_save="/tmp/ipset_ip_gw_save"				# tmp file for already connected ips
3042 rexy 45
SSH_LAN=`grep ^SSH_LAN= $CONF_FILE|cut -d"=" -f2`			# SSH LAN port
46
SSH_LAN=${SSH_LAN:=0}
3043 rexy 47
SSH_WAN=`grep ^SSH_WAN= $CONF_FILE|cut -d"=" -f2`		# SSH WAN port
3042 rexy 48
SSH_WAN=${SSH_WAN:=0}
49
SSH_WAN_ADMIN_FROM=`grep ^SSH_ADMIN_FROM= $CONF_FILE|cut -d"=" -f2|cut -d"/" -f2`
50
SSH_WAN_ADMIN_FROM=${SSH_WAN_ADMIN_FROM:="0.0.0.0"}
51
SSH_WAN_ADMIN_FROM=$([ "$SSH_WAN_ADMIN_FROM" == "0.0.0.0" ] && echo "0.0.0.0/0" || echo "$SSH_WAN_ADMIN_FROM" )
52
SSH_LAN_ADMIN_FROM=`grep ^SSH_ADMIN_FROM= $CONF_FILE|cut -d"=" -f2|cut -d"/" -f1`
53
SSH_LAN_ADMIN_FROM=${SSH_LAN_ADMIN_FROM:="0.0.0.0"}
54
SSH_LAN_ADMIN_FROM=$([ "$SSH_LAN_ADMIN_FROM" == "0.0.0.0" ] && echo "$PRIVATE_NETWORK_MASK" || echo "$SSH_LAN_ADMIN_FROM" )
612 richard 55
IPTABLES="/sbin/iptables"
3043 rexy 56
REHABILITED_IP="/etc/e2guardian/lists/exceptioniplist"
57
ALLOWED_SITES="/usr/local/etc/alcasar-site-direct"			# WEB Sites allowed for all (no av and no filtering for av_bl users)
2956 rexy 58
MULTIWAN=`grep ^MULTIWAN $CONF_FILE|cut -d"=" -f2`
59
PROXY=`grep ^PROXY= $CONF_FILE|cut -d"=" -f2`
60
PROXY_IP=`grep ^PROXY_IP= $CONF_FILE|cut -d"=" -f2`
61
nb_gw=`grep ^WAN $CONF_FILE|wc -l`
3046 rexy 62
interlan=`grep ^INTERLAN= $CONF_FILE|cut -d"=" -f2`
63
interlan=${interlan:=off}
1 root 64
 
2688 lucas.echa 65
# Allow requests to internal DNS if activated
66
if [ "$INT_DNS_ACTIVE" = "on" ]
67
then
68
	DNSSERVERS="$DNSSERVERS,$INT_DNS_IP"
69
fi
70
 
2956 rexy 71
#ipset name list for load_balancing
72
gw_list="gw0"
73
if [ "$MULTIWAN" == "on" ] || [ "$MULTIWAN" == "On" ]; then
74
	for ((i=1 ; i<=$nb_gw ; i++)); do
75
		gw_list="${gw_list} gw$i"
76
	done
77
fi
78
 
1364 richard 79
# Sauvegarde des SET des utilisateurs connectés si ils existent
80
# Saving SET of connected users if it exists
1867 raphael.pi 81
ipset list not_filtered 1>/dev/null 2>&1
1364 richard 82
if [ $? -eq 0 ];
83
then
1867 raphael.pi 84
	ipset save not_filtered > $TMP_users_set_save
2841 rexy 85
	ipset save av >> $TMP_users_set_save
86
	ipset save av_bl >> $TMP_users_set_save
87
	ipset save av_wl >> $TMP_users_set_save
2006 raphael.pi 88
	ipset save proto_0 >> $TMP_users_set_save
89
	ipset save proto_1 >> $TMP_users_set_save
90
	ipset save proto_2 >> $TMP_users_set_save
91
	ipset save proto_3 >> $TMP_users_set_save
1364 richard 92
fi
93
 
2956 rexy 94
# Sauvegarde de la liste de toutes les IP déjà connectées pour les réintégrer dans le load balancing
95
# Saving all of the already connected IP in order to put them back in the load balancing after
96
if [ ! -f $TMP_ip_gw_save ];then
97
	# Save only if alcasar-network.sh --save has not been executed before
98
	for i in $gw_list;do
99
		ipset list $i 1>/dev/null 2>&1
100
		if [ $? -eq 0 ]
101
		then
102
			# the cut -d":" -f5 deletes all the lines with a :, i.e all the lines execpt the members
103
			ipset list $i | cut -d":" -f5 | sed '/^[[:space:]]*$/d' >> $TMP_ip_gw_save
104
		fi
105
	done
106
fi
107
 
2668 rexy 108
# Chargement de la sonde NetFlow (module noyau ipt_NETFLOW)
1291 richard 109
# loading of NetFlow probe (ipt_NETFLOW kernel module)
1159 crox53 110
modprobe ipt_NETFLOW destination=127.0.0.1:2055
111
 
498 richard 112
# Effacement des règles existantes
476 richard 113
# Flush all existing rules
1 root 114
$IPTABLES -F
115
$IPTABLES -t nat -F
116
$IPTABLES -t mangle -F
117
$IPTABLES -F INPUT
118
$IPTABLES -F FORWARD
119
$IPTABLES -F OUTPUT
120
 
498 richard 121
# Suppression des chaines utilisateurs sur les tables filter et nat
122
# Flush non default rules on filter and nat tables
123
$IPTABLES -X
124
$IPTABLES -t nat -X
125
 
126
# Stratégies par défaut
476 richard 127
# Default policies
1 root 128
$IPTABLES -P INPUT DROP
129
$IPTABLES -P FORWARD DROP
498 richard 130
$IPTABLES -P OUTPUT DROP
1 root 131
$IPTABLES -t nat -P PREROUTING ACCEPT
132
$IPTABLES -t nat -P POSTROUTING ACCEPT
133
$IPTABLES -t nat -P OUTPUT ACCEPT
134
 
1484 richard 135
#############################
136
#          IPSET            #
137
#############################
1291 richard 138
# destruction de tous les SET
1332 richard 139
# destroy all SET
1876 raphael.pi 140
ipset flush
1291 richard 141
ipset destroy
1855 raphael.pi 142
 
1484 richard 143
###### BL set  ###########
144
# Calcul de la taille / Compute the length
1932 richard 145
bl_set_length=$(wc -l $BL_IP_CAT/* | awk '{print $1}' | tail -n 1)
1484 richard 146
# Chargement / loading
1867 raphael.pi 147
echo "create bl_ip_blocked hash:net family inet hashsize 1024 maxelem $bl_set_length" > $TMP_set_save
1393 richard 148
for category in `ls -1 $BL_IP_CAT | cut -d '@' -f1`
1332 richard 149
do
1364 richard 150
	cat $BL_IP_CAT/$category >> $TMP_set_save
1332 richard 151
done
1364 richard 152
ipset -! restore < $TMP_set_save
153
rm -f $TMP_set_save
1484 richard 154
# Suppression des ip réhabilitées / Removing of rehabilitated ip
3043 rexy 155
for ip in $(cat $REHABILITED_IP)
1339 richard 156
do
2688 lucas.echa 157
	ipset -q del bl_ip_blocked $ip
1339 richard 158
done
159
 
2841 rexy 160
# ipset for exception web sites (usefull for filtered users = av_bl)
2485 franck 161
ipset create site_direct hash:net hashsize 1024
3043 rexy 162
for site in $(cat $ALLOWED_SITES)
2485 franck 163
do
2688 lucas.echa 164
    ipset add site_direct $site
2485 franck 165
done
166
 
1484 richard 167
###### WL set  ###########
3099 rexy 168
# taille fixe, car peuplé par unbound / fixe length due to unbound dynamic loading
1896 raphael.pi 169
wl_set_length=65536
1484 richard 170
# Chargement Loading
1867 raphael.pi 171
echo "create wl_ip_allowed hash:net family inet hashsize 1024 maxelem $wl_set_length" > $TMP_set_save
1852 raphael.pi 172
#get ip-wl files from ACC
1932 richard 173
for category in `ls -1 $WL_IP_CAT |cut -d '@' -f1`
1852 raphael.pi 174
do
1932 richard 175
	cat $WL_IP_CAT/$category >> $TMP_set_save
1852 raphael.pi 176
done
1364 richard 177
ipset -! restore < $TMP_set_save
178
rm -f $TMP_set_save
179
 
2454 tom.houday 180
# Restoration des SET des utilisateurs connectés si ils existent sinon création des SET
1377 richard 181
# Restoring the connected users SETs if available, otherwise creating SETs
1364 richard 182
if [ -e $TMP_users_set_save ];
183
then
184
	ipset -! restore < $TMP_users_set_save
185
	rm -f $TMP_users_set_save
186
else
2386 tom.houday 187
	ipset create not_filtered hash:ip hashsize 1024
2841 rexy 188
	ipset create av hash:ip hashsize 1024
189
	ipset create av_bl hash:ip hashsize 1024
190
	ipset create av_wl hash:ip hashsize 1024
2668 rexy 191
	# pour les filtrages de protocole par utilisateur / For network protocols filtering by user
2386 tom.houday 192
	ipset create proto_0 hash:ip hashsize 1024
193
	ipset create proto_1 hash:ip hashsize 1024
194
	ipset create proto_2 hash:ip hashsize 1024
195
	ipset create proto_3 hash:ip hashsize 1024
1364 richard 196
fi
197
 
2956 rexy 198
#ipsets for load balancing
199
for i in $gw_list; do
200
	ipset create $i hash:ip
201
done
202
cat $TMP_ip_gw_save | while read ip; do
203
	gw_min="gw0"
204
	weight=`grep ^PUBLIC_WEIGHT= $CONF_FILE | cut -d"=" -f2`
205
	already=`ipset list $gw_min | grep Number\ of\ entries: | cut -d":" -f2`
206
	#The *1000 is here to avoid working on floats in bash
207
	gw_min_value=$((1000 * $already / $weight))
208
	i=1
209
	for gw in $gw_list;do
210
		if [ "$gw" != "gw0" ]; then
211
			weight=`grep ^WAN$i= $CONF_FILE | awk -F'"' '{ print $2 }' | awk -F ',' '{ print $2 }'`
212
			already=`ipset list $gw | grep Number\ of\ entries: | cut -d":" -f2`
213
			value=$((1000 * $already / $weight))
214
			if [ $value -lt $gw_min_value ]
215
			then
216
				gw_min_value=$value
217
				gw_min=$gw
218
			fi
219
			i=$(($i+1))
220
		fi
221
	done
222
	ipset add $gw_min $ip
223
done
224
rm -f $TMP_ip_gw_save
225
 
472 richard 226
#############################
783 richard 227
#       PREROUTING          #
472 richard 228
#############################
2840 rexy 229
# Marquage (et journalisation) des paquets qui tentent d'accéder directement aux ports d'écoute du proxy HTTP/HTTPS (E2Guardian) pour pouvoir les rejeter en INPUT
230
# Mark (and log) the direct attempts to E2guardian listen ports in order to REJECT them in INPUT rules
2841 rexy 231
# 8080 = ipset av_bl
2355 tom.houday 232
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j NFLOG --nflog-group 1 --nflog-prefix "RULE direct-proxy -- DENY "
783 richard 233
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
2841 rexy 234
# 8090 = ipset av_wl + av
2355 tom.houday 235
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8090 -j NFLOG --nflog-group 1 --nflog-prefix "RULE direct-proxy -- DENY "
1486 richard 236
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8090 -j MARK --set-mark 2
2844 rexy 237
# 8443 = tranparent HTTPS for ipsets av_bl + av_wl + av (future version)
238
#$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8443 -j NFLOG --nflog-group 1 --nflog-prefix "RULE direct-proxy -- DENY "
239
#$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8443 -j MARK --set-mark 6
1486 richard 240
 
2840 rexy 241
# Marquage des paquets qui tentent d'accéder directement aux ports d'écoute DNS (UNBOUND) pour pouvoir les rejeter en INPUT
242
# Mark the direct attempts to DNS ports (UNBOUND) in order to REJECT them in INPUT rules
2841 rexy 243
# 54 = ipset av_bl
1486 richard 244
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 3
1962 richard 245
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p udp --dport 54 -j MARK --set-mark 3
2841 rexy 246
# 55 = ipset av_wl
1486 richard 247
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 55 -j MARK --set-mark 4
1962 richard 248
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p udp --dport 55 -j MARK --set-mark 4
2840 rexy 249
# 56 = blackall
1486 richard 250
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 56 -j MARK --set-mark 5
1962 richard 251
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p udp --dport 56 -j MARK --set-mark 5
1472 richard 252
 
2840 rexy 253
# redirection DNS des usagers
254
# users DNS redirection
2841 rexy 255
# 54 = ipset av_bl
256
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_bl src -p udp --dport domain -j REDIRECT --to-port 54
257
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_bl src -p tcp --dport domain -j REDIRECT --to-port 54
258
# 55 = ipset av_wl
259
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_wl src -p udp --dport domain -j REDIRECT --to-port 55
260
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_wl src -p tcp --dport domain -j REDIRECT --to-port 55
2956 rexy 261
# 53 = all other users
2517 rexy 262
$IPTABLES -A PREROUTING -t nat -i $TUNIF ! -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 53
263
$IPTABLES -A PREROUTING -t nat -i $TUNIF ! -d $PRIVATE_IP -p tcp --dport domain -j REDIRECT --to-port 53
264
 
2844 rexy 265
# Redirection HTTP des usagers 'av_bl' cherchant à joindre les IP de la blacklist vers ALCASAR (page 'accès interdit')
266
# Redirect HTTP of 'av_bl' users who want blacklist IP to ALCASAR ('access denied' page)
267
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_bl src -m set --match-set bl_ip_blocked dst -p tcp --dport http -j REDIRECT --to-port 80
268
 
269
# Redirection HTTP des usagers 'av_wl' cherchant à joindre les IP qui ne sont pas dans la WL vers ALCASAR (page 'accès interdit')
270
# Redirect HTTP of 'av_wl' users who want IP not in the WL to ALCASAR ('access denied' page)
271
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_wl src -m set ! --match-set wl_ip_allowed dst -p tcp --dport http -j REDIRECT --to-port 80
272
 
273
# Journalisation des usagers "av_bl + av_wl + av" (paquets SYN uniquement). Les autres protocoles sont journalisés en FORWARD par netflow.
274
# accounting of "av_bl + av_wl + av"  users (only syn packets). Other protocols are logged in FORWARD by netflow
275
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_bl src ! -d $PRIVATE_IP -p tcp --dport http -m conntrack --ctstate NEW -j NFLOG --nflog-group 1 --nflog-prefix "RULE F_http -- ACCEPT "
276
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_wl src ! -d $PRIVATE_IP -p tcp --dport http -m conntrack --ctstate NEW -j NFLOG --nflog-group 1 --nflog-prefix "RULE F_http -- ACCEPT "
277
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av src ! -d $PRIVATE_IP -p tcp --dport http -m conntrack --ctstate NEW -j NFLOG --nflog-group 1 --nflog-prefix "RULE F_http -- ACCEPT "
278
 
279
# Redirection des requêtes HTTP des usagers "av_bl + av_wl + av" vers E2guardian
280
# Redirect outbound "av_bl + av_wl +av" users HTTP requests to E2guardian
2841 rexy 281
# 8080 = ipset av_bl
2956 rexy 282
#$IPTABLES -A PREROUTING -t mangle -i $TUNIF -m set --match-set av_bl src -m set ! --match-set site_direct dst ! -d $PRIVATE_IP  -p tcp --dport http -j MARK --set-mark 200
2841 rexy 283
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_bl src -m set ! --match-set site_direct dst ! -d $PRIVATE_IP  -p tcp --dport http -j REDIRECT --to-port 8080
284
# 8090 = ipset av_wl & av
285
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_wl src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8090
286
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8090
2840 rexy 287
 
2844 rexy 288
# Redirection des requêtes HTTPS sortantes des usagers av_bl + av_wl + av vers E2Guardian (in a future version - don't forget to set E2guardian as a tranparent HTTPS proxy)
2841 rexy 289
# Redirect outbound HTTPS requests of av_bl + av_wl + av users to E2Guardian
2844 rexy 290
#$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_bl src -m set ! --match-set site_direct dst ! -d $PRIVATE_IP  -p tcp --dport https -j REDIRECT --to-port 8443
291
#$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_wl src -m set ! --match-set site_direct dst ! -d $PRIVATE_IP  -p tcp --dport https -j REDIRECT --to-port 8443
292
#$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av src -m set ! --match-set site_direct dst ! -d $PRIVATE_IP  -p tcp --dport https -j REDIRECT --to-port 8443
2840 rexy 293
 
783 richard 294
# Redirection des requêtes NTP vers le serveur NTP local
295
# Redirect NTP request in local NTP server
296
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
297
 
2956 rexy 298
#Récupération de la marque associée à une gw pour chaque connection
299
$IPTABLES -A PREROUTING -t mangle -j CONNMARK --restore-mark
300
 
301
if [ "$PROXY" == "on" ] || [ "$PROXY" == "On" ];then
302
	$IPTABLES -A PREROUTING -t nat -i $TUNIF ! -d $PRIVATE_IP -p tcp -m multiport --dports http,https -j DNAT --to-destination $PROXY_IP
303
fi
304
 
305
#Marquage pour le load balancing
306
if [ "$MULTIWAN" == "on" ] || [ "$MULTIWAN" == "On" ]; then
307
	temp_index=200
308
	for i in $gw_list; do
309
		$IPTABLES -A PREROUTING -t mangle -i $TUNIF -m set --match-set $i src -j MARK --set-mark $temp_index
310
		temp_index=$(($temp_index+1))
311
	done
312
fi
313
 
472 richard 314
#############################
783 richard 315
#         INPUT             #
472 richard 316
#############################
783 richard 317
# Tout passe sur loopback
318
# accept all on loopback
319
$IPTABLES -A INPUT -i lo -j ACCEPT
990 franck 320
$IPTABLES -A OUTPUT -o lo -j ACCEPT
783 richard 321
 
322
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
2956 rexy 323
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST and NEW not SYN)
472 richard 324
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
325
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
326
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
327
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
2496 tom.houday 328
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m conntrack --ctstate NEW -j DROP
498 richard 329
 
3046 rexy 330
# Si configuré, on autorise les réponses DHCP sur EXTIF
331
# If configured, DHCP responses are allowed on EXTIF
332
if [[ "$dhcp_on_extif" == "on" ]]
1587 richard 333
then
3046 rexy 334
	$IPTABLES -A INPUT -i $EXTIF -p tcp --dport 68 -j ACCEPT
335
	$IPTABLES -A INPUT -i $EXTIF -p udp --dport 68 -j ACCEPT
1587 richard 336
fi
3046 rexy 337
 
871 richard 338
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
2454 tom.houday 339
# Drop broadcast & multicast on EXTIF to avoid log
1629 richard 340
$IPTABLES -A INPUT -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
498 richard 341
 
783 richard 342
# On autorise les retours de connexions légitimes par INPUT
343
# Conntrack on INPUT
2496 tom.houday 344
$IPTABLES -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
373 richard 345
 
2840 rexy 346
# On interdit les connexions directes aux ports d'écoute d'E2Guardian. Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
347
# Deny direct connections on E2Guardian listen ports. The concerned paquets have been marked and logged in mangle table (PREROUTING)
2841 rexy 348
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset # av_bl
349
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8090 -m mark --mark 2 -j REJECT --reject-with tcp-reset # av_wl + av
2844 rexy 350
#$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8443 -m mark --mark 6 -j REJECT --reject-with tcp-reset # av_bl + av_wl + av (future version)
791 richard 351
 
2840 rexy 352
# On autorise les connexions HTTP/HTTPS légitimes vers E2Guardian
353
# Allow HTTP connections to E2Guardian
2496 tom.houday 354
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m conntrack --ctstate NEW --syn -j ACCEPT
355
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8090 -m conntrack --ctstate NEW --syn -j ACCEPT
2844 rexy 356
#$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8443 -m conntrack --ctstate NEW --syn -j ACCEPT # (future version)
1486 richard 357
 
2840 rexy 358
# On interdit les connexions directes aux ports d'écoupe DNS (UNBOUND). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
359
# Deny direct connections to DNS ports (UNBOUND). The concerned paquets are marked in mangle table (PREROUTING)
1962 richard 360
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 3 -j REJECT --reject-with icmp-port-unreachable
361
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 54 -m mark --mark 3 -j REJECT --reject-with tcp-reset
362
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 55 -m mark --mark 4 -j REJECT --reject-with icmp-port-unreachable
2840 rexy 363
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 55 -m mark --mark 4 -j REJECT --reject-with tcp-reset
1962 richard 364
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 56 -m mark --mark 5 -j REJECT --reject-with icmp-port-unreachable
2840 rexy 365
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 56 -m mark --mark 5 -j REJECT --reject-with tcp-reset
1472 richard 366
 
2840 rexy 367
# On autorise les connexion DNS légitime
368
# Allow DNS connections
2841 rexy 369
# ipset = av_bl
783 richard 370
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
1962 richard 371
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 54 -j ACCEPT
2841 rexy 372
# ipset = av_wl
1364 richard 373
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT
1962 richard 374
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 55 -j ACCEPT
2840 rexy 375
# blackall
1472 richard 376
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 56 -j ACCEPT
1962 richard 377
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 56 -j ACCEPT
1472 richard 378
 
2840 rexy 379
# On accepte l'accès aux services internes
783 richard 380
# Internal services access
2454 tom.houday 381
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT	# DNS
1962 richard 382
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport domain -j ACCEPT	# DNS
786 richard 383
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT	# Réponse ping # ping responce
384
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT	# Requête  ping # ping request
385
$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
386
$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
2370 tom.houday 387
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 3990:3991 -j ACCEPT	# Requêtes de deconnexion usagers # Users logout requests
786 richard 388
$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 389
 
3042 rexy 390
# Accès au serveur SSHD si activé en LAN et WAN
391
# SSHD server access in LAN and WAN if enabled
392
if [ $SSH_LAN -gt 0 ]
520 richard 393
	then
3042 rexy 394
	$IPTABLES -A INPUT -i $TUNIF -s $SSH_LAN_ADMIN_FROM -d $PRIVATE_IP -p tcp --dport $SSH_LAN -m conntrack --ctstate NEW -j NFLOG --nflog-group 2 --nflog-prefix "RULE ssh-from-LAN -- ACCEPT"
395
	$IPTABLES -A INPUT -i $TUNIF -s $SSH_LAN_ADMIN_FROM -d $PRIVATE_IP -p tcp --dport $SSH_LAN -j ACCEPT
520 richard 396
fi
3042 rexy 397
if [ $SSH_WAN -gt 0 ]
398
	then
399
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_WAN_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport $SSH_WAN -m conntrack --ctstate NEW --syn -j NFLOG --nflog-group 2 --nflog-prefix "RULE ssh-from-WAN -- ACCEPT"
3043 rexy 400
	$IPTABLES -A INPUT -i $EXTIF -s $SSH_WAN_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport $SSH_WAN -j ACCEPT
3042 rexy 401
fi
783 richard 402
 
403
# Insertion de règles locales
404
# Here, we add local rules (i.e. VPN from Internet)
405
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
2454 tom.houday 406
	. /usr/local/etc/alcasar-iptables-local.sh
783 richard 407
fi
408
 
409
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
410
# Deny and log on INPUT from the LAN
2844 rexy 411
$IPTABLES -A INPUT -i $TUNIF -m conntrack --ctstate NEW -j NFLOG --nflog-group 3 --nflog-prefix "RULE rej-int -- REJECT "
783 richard 412
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
413
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
414
 
1393 richard 415
# Interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
783 richard 416
# Reject INTIF access (only when chilli is down)
2844 rexy 417
$IPTABLES -A INPUT -i $INTIF -j NFLOG --nflog-group 3 --nflog-prefix "RULE Protect1 -- REJECT "
783 richard 418
$IPTABLES -A INPUT -i $INTIF -j REJECT
419
 
420
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
421
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
2496 tom.houday 422
$IPTABLES -A INPUT -i $EXTIF -m conntrack --ctstate NEW -j NFLOG --nflog-group 3 --nflog-threshold 10 --nflog-prefix "RULE rej-ext -- DROP"
783 richard 423
 
424
#############################
425
#        FORWARD            #
426
#############################
3046 rexy 427
# On autorise (ou pas) les utilisateurs à accéder au réseau situé entre ALCASAR et le routeur Internet
428
# Users are allowed (or not allowed) to access the network between ALCASAR and the Internet router
429
if [ "$interlan" != "on" ]
430
then
431
	$IPTABLES -A FORWARD -i $TUNIF -d $public_ip_mask -j DROP
432
fi
433
 
2841 rexy 434
# Blocage des IPs du SET bl_ip_blocked pour le SET av_bl
435
# Deny IPs of the SET bl_ip_blocked for the set av_bl
436
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set av_bl src -m set --match-set bl_ip_blocked dst -p icmp -j REJECT --reject-with icmp-host-prohibited
437
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set av_bl src -m set --match-set bl_ip_blocked dst -p udp -j REJECT --reject-with icmp-host-prohibited
438
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set av_bl src -m set --match-set bl_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset
1364 richard 439
 
2184 richard 440
# Active le suivi de session
441
# Allow Conntrack
2496 tom.houday 442
$IPTABLES -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
790 richard 443
 
2668 rexy 444
# Compute uamallowed IP (ie : IP address of equipments connected between ALCASAR and router like DMZ, own servers, etc.)
2006 raphael.pi 445
nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" "  -f1`
446
if [ $nb_uamallowed != "0" ]
447
then
2454 tom.houday 448
	while read ip_allowed_line
1488 richard 449
	do
2006 raphael.pi 450
		ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
2496 tom.houday 451
		$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m conntrack --ctstate NEW -j NETFLOW
452
		$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m conntrack --ctstate NEW -j ACCEPT
2006 raphael.pi 453
	done < /usr/local/etc/alcasar-uamallowed
454
fi
492 franck 455
 
2184 richard 456
# filtrage protocole par utilisateur (profile 1 : http, https)
457
# protocols filtering for users (profil 1 : http, https)
2496 tom.houday 458
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_1 src -s $PRIVATE_NETWORK_MASK -p tcp -m multiport ! --dports http,https -m conntrack --ctstate NEW -j REJECT --reject-with tcp-reset
459
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_1 src -s $PRIVATE_NETWORK_MASK -p udp -m multiport ! --dports http,https -m conntrack --ctstate NEW -j REJECT --reject-with icmp-port-unreachable
2006 raphael.pi 460
 
2998 rexy 461
# filtrage protocole par utilisateur (profile 2 : http https smtp pop3 pop3s imap imaps ftp sftp ssh)
462
# protocols filtering for users (profil 2 : http https smtp pop3 pop3s imap imaps ftp sftp ssh)
2006 raphael.pi 463
 
2998 rexy 464
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_2 src -s $PRIVATE_NETWORK_MASK -p tcp -m multiport ! --dports smtp,http,https,pop3,pop3s,imap,imaps,ftp,ftp-data,sftp,ssh -m conntrack --ctstate NEW -j REJECT --reject-with tcp-reset
465
	$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_2 src -s $PRIVATE_NETWORK_MASK -p udp -m multiport ! --dports smtp,http,https,pop3,pop3s,imap,imaps,ftp,ftp-data,sftp,ssh -m conntrack --ctstate NEW -j REJECT --reject-with icmp-port-unreachable
2006 raphael.pi 466
 
2184 richard 467
# filtrage protocole par utilisateur (profile 3 : personnalisable via l'ACC)
468
# protocols filtering for users (profil 3 : customized with ACC)
469
custom_tcp_protocols_list='';custom_udp_protocols_list=''
2006 raphael.pi 470
while read svc_line
471
do
472
	svc_on=`echo $svc_line|cut -b1`
473
	if [ $svc_on != "#" ]
2688 lucas.echa 474
	then
2006 raphael.pi 475
		svc_name=`echo $svc_line|cut -d" " -f1`
476
		svc_port=`echo $svc_line|cut -d" " -f2`
477
		if [ $svc_name = "icmp" ]
478
		then
2184 richard 479
			svc_icmp="on"
2006 raphael.pi 480
		else
2184 richard 481
			if [ "$custom_tcp_protocols_list" == "" ]
482
			then
483
				custom_tcp_protocols_list=$svc_port
484
			else
485
				custom_tcp_protocols_list=`echo $custom_tcp_protocols_list","$svc_port`
486
			fi
487
			udp_svc=`egrep "[[:space:]]$svc_port/udp" /etc/services|wc -l`
488
			if [ $udp_svc = "1" ] # udp service exist
489
			then
490
				if [ "$custom_udp_protocols_list" == "" ]
491
				then
492
					custom_udp_protocols_list=$svc_port
493
				else
494
					custom_udp_protocols_list=`echo $custom_udp_protocols_list","$svc_port`
495
				fi
496
			fi
1488 richard 497
		fi
2006 raphael.pi 498
	fi
499
done < /usr/local/etc/alcasar-services
2184 richard 500
	if [ "$custom_tcp_protocols_list" == "" ]
501
	then
502
		$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_3 src -s $PRIVATE_NETWORK_MASK -j REJECT
503
	else
504
		if [ "$svc_icmp" != "on" ]
505
		then
506
			$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_3 src -s $PRIVATE_NETWORK_MASK -p icmp -j REJECT --reject-with icmp-proto-unreachable
507
		fi
2496 tom.houday 508
		$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_3 src -s $PRIVATE_NETWORK_MASK -p tcp -m multiport ! --dports $custom_tcp_protocols_list -m conntrack --ctstate NEW -j REJECT --reject-with tcp-reset
509
		$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_3 src -s $PRIVATE_NETWORK_MASK -p udp -m multiport ! --dports $custom_udp_protocols_list -m conntrack --ctstate NEW -j REJECT --reject-with icmp-port-unreachable
2184 richard 510
	fi
1488 richard 511
 
2841 rexy 512
# Blocage des usagers 'av_wl' cherchant à joindre les IP qui ne sont pas dans la WL
513
# Block 'av_wl' users who want IP not in the WL
514
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set av_wl src -m set ! --match-set wl_ip_allowed dst -j DROP
2674 lucas.echa 515
 
2454 tom.houday 516
# journalisation et autorisation des connections sortant du LAN
476 richard 517
# Allow forward connections with log
2496 tom.houday 518
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m conntrack --ctstate NEW -j NETFLOW
519
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m conntrack --ctstate NEW -j ACCEPT
1 root 520
 
783 richard 521
#############################
522
#         OUTPUT            #
523
#############################
2844 rexy 524
# On laisse tout sortir sur la carte interne (voir les règles suivantes pour la carte externe)
525
# We let everything out on INTIF (see following rules for the EXTIF)
2213 richard 526
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
520 richard 527
 
3046 rexy 528
# Si configuré, on autorise les requêtes DHCP sur EXTIF
529
# Allow DHCP requests on EXTIF if configured
530
if [[ "$dhcp_on_extif" == "on" ]]
1587 richard 531
then
532
	$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport 67 -j ACCEPT
533
	$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport 67 -j ACCEPT
534
fi
535
 
2454 tom.houday 536
# On autorise les requêtes DNS vers les serveurs DNS identifiés
498 richard 537
# Allow DNS requests to identified DNS servers
2496 tom.houday 538
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m conntrack --ctstate NEW -j ACCEPT
783 richard 539
 
2844 rexy 540
# On autorise les requêtes HTTP et HTTPS avec log Netflow (en provenance de E2guardian)
541
# HTTP & HTTPS requests are allowed with netflow log (from E2guardian)
1159 crox53 542
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
498 richard 543
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
2956 rexy 544
#$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport https -j NETFLOW # When E2guardian will be in HTTPS transparent proxy)
2259 tom.houday 545
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport https -j ACCEPT
546
 
1862 raphael.pi 547
# On autorise les requêtes RSYNC sortantes (maj BL de Toulouse)
2468 richard 548
# RSYNC requests are allowed (update of Toulouse BL)
1862 raphael.pi 549
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport rsync -j ACCEPT
550
 
2454 tom.houday 551
# On autorise les requêtes FTP
784 richard 552
# FTP requests are allowed
3103 rexy 553
# modprobe nf_conntrack_ftp # no more needed with kernel > 5.15.85
554
# $IPTABLES -t raw -A OUTPUT -p tcp --dport ftp -j CT --helper ftp # no more needed with kernel > 5.15.85
784 richard 555
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
2496 tom.houday 556
$IPTABLES -A OUTPUT -o $EXTIF -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
784 richard 557
 
2454 tom.houday 558
# On autorise les requêtes NTP
498 richard 559
# NTP requests are allowed
560
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
783 richard 561
 
2454 tom.houday 562
# On autorise les requêtes ICMP (ping)
503 richard 563
# ICMP (ping) requests are allowed
564
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
783 richard 565
 
2468 richard 566
# On autorise les requêtes LDAP
567
# LDAP requests are allowed
2496 tom.houday 568
$IPTABLES -A OUTPUT -o $EXTIF -p tcp -m multiport --dports ldap,ldaps -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT
569
$IPTABLES -A OUTPUT -o $EXTIF -p udp -m multiport --dports ldap,ldaps -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT
783 richard 570
 
571
#############################
572
#       POSTROUTING         #
573
#############################
498 richard 574
# Traduction dynamique d'adresse en sortie
476 richard 575
# Dynamic NAT on EXTIF
1 root 576
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
577
 
2956 rexy 578
#Sauvegarde de la marque associée à la connexion pour le load balancing
579
$IPTABLES -A POSTROUTING -t mangle -j CONNMARK --save-mark
580
 
2495 tom.houday 581
#############################
582
#          FAIL2BAN         #
583
#############################
584
# Reload Fail2Ban
2530 lucas.echa 585
if systemctl -q is-active fail2ban; then
2899 rexy 586
	/usr/bin/fail2ban-client ping &>/dev/null && /usr/bin/fail2ban-client -q reload &>/dev/null
2530 lucas.echa 587
fi