872 |
richard |
1 |
#!/bin/bash
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64 |
franck |
2 |
# $Id: alcasar-iptables.sh 2262 2017-05-29 20:19:03Z tom.houdayer $
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675 |
richard |
3 |
# Script de mise en place des regles du parefeu d'Alcasar (mode normal)
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1339 |
richard |
4 |
# This script writes the netfilter rules for ALCASAR
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675 |
richard |
5 |
# Rexy - 3abtux - CPN
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6 |
#
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7 |
# Reminders
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1221 |
richard |
8 |
# There are four channels for log :
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1294 |
richard |
9 |
# 1 tracability of the consultation equipment with The 'Netflow' kernel module (iptables target = NETFLOW);
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1221 |
richard |
10 |
# 2 protection of ALCASAR with the Ulog group 1 (default group)
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1294 |
richard |
11 |
# 3 SSH on ALCASAR with the Ulog group 2;
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12 |
# 4 extern access attempts on ALCASAR with the Ulog group 3.
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1469 |
richard |
13 |
# The bootps/dhcp (67) port is always open on tun0/INTIF by coova
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14 |
CONF_FILE="/usr/local/etc/alcasar.conf"
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1587 |
richard |
15 |
EXTIF=`grep ^EXTIF= $CONF_FILE|cut -d"=" -f2` # EXTernal InterFace
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INTIF=`grep ^INTIF= $CONF_FILE|cut -d"=" -f2` # INTernal InterFace
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TUNIF="tun0" # listen device for chilli daemon
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1469 |
richard |
18 |
private_ip_mask=`grep ^PRIVATE_IP= $CONF_FILE|cut -d"=" -f2`
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615 |
richard |
19 |
private_ip_mask=${private_ip_mask:=192.168.182.1/24}
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783 |
richard |
20 |
PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1` # ALCASAR LAN IP address
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604 |
richard |
21 |
private_network=`/bin/ipcalc -n $private_ip_mask|cut -d"=" -f2` # LAN IP address (ie.: 192.168.182.0)
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22 |
private_prefix=`/bin/ipcalc -p $private_ip_mask|cut -d"=" -f2` # LAN prefix (ie. 24)
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783 |
richard |
23 |
PRIVATE_NETWORK_MASK=$private_network/$private_prefix # Lan IP address + prefix (192.168.182.0/24)
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1469 |
richard |
24 |
public_ip_mask=`grep ^PUBLIC_IP= $CONF_FILE|cut -d"=" -f2` # ALCASAR WAN IP address
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1585 |
richard |
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if [[ "$public_ip_mask" == "dhcp" ]]
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then
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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"
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1587 |
richard |
28 |
public_ip_mask=`ip addr show $EXTIF | egrep -o $PTN`
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1585 |
richard |
29 |
fi
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783 |
richard |
30 |
PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1`
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1588 |
richard |
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dns1=`grep ^DNS1= $CONF_FILE|cut -d"=" -f2`
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dns2=`grep ^DNS2= $CONF_FILE|cut -d"=" -f2`
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615 |
richard |
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dns1=${dns1:=208.67.220.220}
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dns2=${dns2:=208.67.222.222}
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1585 |
richard |
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DNSSERVERS="$dns1,$dns2" # first and second public DNS servers
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1332 |
richard |
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BL_IP_CAT="/usr/local/share/iptables-bl-enabled" # categories files of the BlackListed IP
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1932 |
richard |
37 |
WL_IP_CAT="/usr/local/share/iptables-wl-enabled" # categories files of the WhiteListed IP
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1364 |
richard |
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TMP_users_set_save="/tmp/users_set_save" # tmp file for backup users set
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TMP_set_save="/tmp/ipset_save" # tmp file for blacklist and whitelist creation
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1469 |
richard |
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SSH=`grep ^SSH= $CONF_FILE|cut -d"=" -f2` # sshd active (on/off)
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615 |
richard |
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SSH=${SSH:=off}
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1469 |
richard |
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SSH_ADMIN_FROM=`grep ^SSH_ADMIN_FROM= $CONF_FILE|cut -d"=" -f2`
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1063 |
richard |
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SSH_ADMIN_FROM=${SSH_ADMIN_FROM:="0.0.0.0/0.0.0.0"} # WAN IP address to reduce ssh access (all ip allowed on LAN side)
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1469 |
richard |
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LDAP=`grep ^LDAP= $CONF_FILE|cut -d"=" -f2` # LDAP external server active (on/off)
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615 |
richard |
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LDAP=${LDAP:=off}
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1469 |
richard |
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LDAP_IP=`grep ^LDAP_IP= $CONF_FILE|cut -d"=" -f2` # WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
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768 |
richard |
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LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}
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richard |
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IPTABLES="/sbin/iptables"
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1339 |
richard |
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IP_REHABILITEES="/etc/dansguardian/lists/exceptioniplist" # Rehabilitated IP
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1364 |
richard |
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SAVE_DIR="/etc/sysconfig" # Saving path
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1 |
root |
51 |
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1364 |
richard |
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# Sauvegarde des SET des utilisateurs connectés si ils existent
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# Saving SET of connected users if it exists
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1867 |
raphael.pi |
54 |
ipset list not_filtered 1>/dev/null 2>&1
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1364 |
richard |
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if [ $? -eq 0 ];
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then
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1867 |
raphael.pi |
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ipset save not_filtered > $TMP_users_set_save
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1872 |
richard |
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ipset save havp >> $TMP_users_set_save
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ipset save havp_bl >> $TMP_users_set_save
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ipset save havp_wl >> $TMP_users_set_save
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2006 |
raphael.pi |
61 |
ipset save proto_0 >> $TMP_users_set_save
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ipset save proto_1 >> $TMP_users_set_save
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ipset save proto_2 >> $TMP_users_set_save
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ipset save proto_3 >> $TMP_users_set_save
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1364 |
richard |
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fi
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1291 |
richard |
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# loading of NetFlow probe (ipt_NETFLOW kernel module)
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1159 |
crox53 |
68 |
modprobe ipt_NETFLOW destination=127.0.0.1:2055
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498 |
richard |
70 |
# Effacement des règles existantes
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476 |
richard |
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# Flush all existing rules
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1 |
root |
72 |
$IPTABLES -F
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$IPTABLES -t nat -F
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$IPTABLES -t mangle -F
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$IPTABLES -F INPUT
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$IPTABLES -F FORWARD
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$IPTABLES -F OUTPUT
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498 |
richard |
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# Suppression des chaines utilisateurs sur les tables filter et nat
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# Flush non default rules on filter and nat tables
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$IPTABLES -X
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$IPTABLES -t nat -X
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# Stratégies par défaut
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476 |
richard |
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# Default policies
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1 |
root |
86 |
$IPTABLES -P INPUT DROP
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$IPTABLES -P FORWARD DROP
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498 |
richard |
88 |
$IPTABLES -P OUTPUT DROP
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1 |
root |
89 |
$IPTABLES -t nat -P PREROUTING ACCEPT
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$IPTABLES -t nat -P POSTROUTING ACCEPT
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$IPTABLES -t nat -P OUTPUT ACCEPT
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92 |
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1484 |
richard |
93 |
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#############################
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# IPSET #
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#############################
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97 |
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1291 |
richard |
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# destruction de tous les SET
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1332 |
richard |
99 |
# destroy all SET
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1876 |
raphael.pi |
100 |
ipset flush
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1291 |
richard |
101 |
ipset destroy
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1855 |
raphael.pi |
102 |
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1484 |
richard |
103 |
###### BL set ###########
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# Calcul de la taille / Compute the length
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1932 |
richard |
105 |
bl_set_length=$(wc -l $BL_IP_CAT/* | awk '{print $1}' | tail -n 1)
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1484 |
richard |
106 |
# Chargement / loading
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1867 |
raphael.pi |
107 |
echo "create bl_ip_blocked hash:net family inet hashsize 1024 maxelem $bl_set_length" > $TMP_set_save
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1393 |
richard |
108 |
for category in `ls -1 $BL_IP_CAT | cut -d '@' -f1`
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1332 |
richard |
109 |
do
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1364 |
richard |
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cat $BL_IP_CAT/$category >> $TMP_set_save
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1332 |
richard |
111 |
done
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1364 |
richard |
112 |
ipset -! restore < $TMP_set_save
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113 |
rm -f $TMP_set_save
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1484 |
richard |
114 |
# Suppression des ip réhabilitées / Removing of rehabilitated ip
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1339 |
richard |
115 |
for ip in $(cat $IP_REHABILITEES)
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do
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1867 |
raphael.pi |
117 |
ipset del bl_ip_blocked $ip
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1339 |
richard |
118 |
done
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119 |
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1484 |
richard |
120 |
###### WL set ###########
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1932 |
richard |
121 |
# taille fixe, car peupler par dnsmasq / fixe length due to dnsmasq dynamic loading
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1896 |
raphael.pi |
122 |
wl_set_length=65536
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1484 |
richard |
123 |
# Chargement Loading
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1867 |
raphael.pi |
124 |
echo "create wl_ip_allowed hash:net family inet hashsize 1024 maxelem $wl_set_length" > $TMP_set_save
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1852 |
raphael.pi |
125 |
#get ip-wl files from ACC
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1932 |
richard |
126 |
for category in `ls -1 $WL_IP_CAT |cut -d '@' -f1`
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1852 |
raphael.pi |
127 |
do
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1932 |
richard |
128 |
cat $WL_IP_CAT/$category >> $TMP_set_save
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1852 |
raphael.pi |
129 |
done
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1364 |
richard |
130 |
ipset -! restore < $TMP_set_save
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131 |
rm -f $TMP_set_save
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132 |
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# Restoration des SET des utilisateurs connectés si ils existent sinon création des SET
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1377 |
richard |
134 |
# Restoring the connected users SETs if available, otherwise creating SETs
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1364 |
richard |
135 |
if [ -e $TMP_users_set_save ];
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136 |
then
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ipset -! restore < $TMP_users_set_save
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138 |
rm -f $TMP_users_set_save
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139 |
else
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1867 |
raphael.pi |
140 |
ipset create not_filtered hash:net hashsize 1024
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1872 |
richard |
141 |
ipset create havp hash:net hashsize 1024
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142 |
ipset create havp_bl hash:net hashsize 1024
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ipset create havp_wl hash:net hashsize 1024
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2006 |
raphael.pi |
144 |
#pour les filtrages de protocole par utilisateur
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ipset create proto_0 hash:net hashsize 1024
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ipset create proto_1 hash:net hashsize 1024
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147 |
ipset create proto_2 hash:net hashsize 1024
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148 |
ipset create proto_3 hash:net hashsize 1024
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1364 |
richard |
149 |
fi
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150 |
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472 |
richard |
151 |
#############################
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783 |
richard |
152 |
# PREROUTING #
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472 |
richard |
153 |
#############################
|
1827 |
raphael.pi |
154 |
|
1453 |
franck |
155 |
# Marquage des paquets qui tentent d'accéder directement à un serveur sans authentification en mode proxy pour pouvoir les rejeter en INPUT
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156 |
# Mark packets that attempt to directly access a server without authentication with proxy client to reject them in INPUT rules
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1459 |
franck |
157 |
#$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
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1453 |
franck |
158 |
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1486 |
richard |
159 |
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au 8080 (DansGuardian) pour pouvoir les rejeter en INPUT
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1962 |
richard |
160 |
# Mark (and log) the direct attempts to TCP port 8090 (dansguardian) in order to REJECT them in INPUT rules
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1731 |
richard |
161 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j NFLOG --nflog-prefix "RULE direct-proxy -- DENY "
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783 |
richard |
162 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
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1 |
root |
163 |
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1486 |
richard |
164 |
# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8090 (tinyproxy) pour pouvoir les rejeter en INPUT
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1962 |
richard |
165 |
# Mark (and log) the direct attempts to TCP port 8090 (tinyproxy) in order to REJECT them in INPUT rules
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1704 |
richard |
166 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8090 -j NFLOG --nflog-prefix "RULE direct-proxy -- DENY "
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1486 |
richard |
167 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8090 -j MARK --set-mark 2
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168 |
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1962 |
richard |
169 |
# Marquage des paquets qui tentent d'accéder directement au port 54 (DNS-blacklist) pour pouvoir les rejeter en INPUT
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170 |
# Mark the direct attempts to port 54 (DNS-blacklist) in order to REJECT them in INPUT rules
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1486 |
richard |
171 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 3
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1962 |
richard |
172 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p udp --dport 54 -j MARK --set-mark 3
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783 |
richard |
173 |
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1962 |
richard |
174 |
# Marquage des paquets qui tentent d'accéder directement au port 55 (DNS-Whitelist) pour pouvoir les rejeter en INPUT
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175 |
# Mark the direct attempts to port 55 (DNS-whitelist) in order to REJECT them in INPUT rules
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1486 |
richard |
176 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 55 -j MARK --set-mark 4
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1962 |
richard |
177 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p udp --dport 55 -j MARK --set-mark 4
|
783 |
richard |
178 |
|
1962 |
richard |
179 |
# Marquage des paquets qui tentent d'accéder directement au port 56 (DNS-Blackhole) pour pouvoir les rejeter en INPUT
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180 |
# Mark the direct attempts to port 56 (DNS-blackhole) in order to REJECT them in INPUT rules
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1486 |
richard |
181 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 56 -j MARK --set-mark 5
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1962 |
richard |
182 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p udp --dport 56 -j MARK --set-mark 5
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1472 |
richard |
183 |
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1544 |
richard |
184 |
# redirection DNS des usagers 'havp_bl' vers le port 54
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185 |
# redirect DNS of 'havp_bl' users to port 54
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1872 |
richard |
186 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl src -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54
|
1393 |
richard |
187 |
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1544 |
richard |
188 |
# redirection DNS des usagers 'havp_wl' vers le port 55
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1872 |
richard |
189 |
# redirect DNS of 'havp_wl' users to port 55
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190 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl src -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 55
|
1364 |
richard |
191 |
|
1544 |
richard |
192 |
# Journalisation HTTP_Internet des usagers 'havp_bl' (paquets SYN uniquement). Les autres protocoles sont journalisés en FORWARD par netflow.
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193 |
# Log Internet HTTP of 'havp_bl' users" (only syn packets). Other protocols are logged in FORWARD by netflow
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1872 |
richard |
194 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl src ! -d $PRIVATE_IP -p tcp --dport http -m state --state NEW -j NFLOG --nflog-prefix "RULE F_http -- ACCEPT "
|
1544 |
richard |
195 |
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196 |
# Redirection HTTP des usagers 'havp_bl' cherchant à joindre les IP de la blacklist vers ALCASAR (page 'accès interdit')
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197 |
# Redirect HTTP of 'havp_bl' users who want blacklist IP to ALCASAR ('access denied' page)
|
1872 |
richard |
198 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl src -m set --match-set bl_ip_blocked dst -p tcp --dport http -j REDIRECT --to-port 80
|
1364 |
richard |
199 |
|
1544 |
richard |
200 |
# Redirection HTTP des usagers 'havp_wl' cherchant à joindre les IP qui ne sont pas dans la WL vers ALCASAR (page 'accès interdit')
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|
201 |
# Redirect HTTP of 'havp_wl' users who want IP not in the WL to ALCASAR ('access denied' page)
|
1872 |
richard |
202 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl src -m set ! --match-set wl_ip_allowed dst -p tcp --dport http -j REDIRECT --to-port 80
|
1393 |
richard |
203 |
|
1544 |
richard |
204 |
# Redirection des requêtes HTTP sortantes des usagers 'havp_bl' vers DansGuardian
|
1484 |
richard |
205 |
# Redirect outbound HTTP requests of "BL" users to DansGuardian (transparent proxy)
|
1872 |
richard |
206 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080
|
1484 |
richard |
207 |
|
1544 |
richard |
208 |
# Redirection des requêtes HTTP sortantes des usager 'havp_wl' et 'havp' vers Tinyproxy
|
1486 |
richard |
209 |
# Redirect outbound HTTP requests for "WL-antivirus" users to Tinyproxy
|
1872 |
richard |
210 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8090
|
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|
211 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8090
|
1364 |
richard |
212 |
|
783 |
richard |
213 |
# Redirection des requêtes NTP vers le serveur NTP local
|
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|
214 |
# Redirect NTP request in local NTP server
|
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|
215 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123
|
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|
216 |
|
472 |
richard |
217 |
#############################
|
783 |
richard |
218 |
# INPUT #
|
472 |
richard |
219 |
#############################
|
871 |
richard |
220 |
|
783 |
richard |
221 |
# Tout passe sur loopback
|
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|
222 |
# accept all on loopback
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223 |
$IPTABLES -A INPUT -i lo -j ACCEPT
|
990 |
franck |
224 |
$IPTABLES -A OUTPUT -o lo -j ACCEPT
|
783 |
richard |
225 |
|
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|
226 |
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
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|
227 |
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
|
472 |
richard |
228 |
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
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|
229 |
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
|
|
|
230 |
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
|
|
|
231 |
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
|
675 |
richard |
232 |
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
|
498 |
richard |
233 |
|
1587 |
richard |
234 |
# Si configéré, on autorise les réponses DHCP
|
|
|
235 |
# Allow DHCP answers if configured
|
|
|
236 |
public_ip_mask=`grep ^PUBLIC_IP= $CONF_FILE|cut -d"=" -f2` # ALCASAR WAN IP address
|
|
|
237 |
if [[ "$public_ip_mask" == "dhcp" ]]
|
|
|
238 |
then
|
|
|
239 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport 68 -j ACCEPT
|
|
|
240 |
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport 68 -j ACCEPT
|
|
|
241 |
fi
|
871 |
richard |
242 |
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
|
|
|
243 |
# Drop broadcast & multicast on EXTIF to avoid log
|
1629 |
richard |
244 |
$IPTABLES -A INPUT -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
|
498 |
richard |
245 |
|
783 |
richard |
246 |
# On autorise les retours de connexions légitimes par INPUT
|
|
|
247 |
# Conntrack on INPUT
|
|
|
248 |
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
|
373 |
richard |
249 |
|
1221 |
richard |
250 |
# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
|
1486 |
richard |
251 |
# Deny direct connections on DansGuardian port (8080). The concerned paquets have been marked and logged in mangle table (PREROUTING)
|
783 |
richard |
252 |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
|
791 |
richard |
253 |
|
783 |
richard |
254 |
# Autorisation des connexions légitimes à DansGuardian
|
|
|
255 |
# Allow connections for DansGuardian
|
|
|
256 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
|
373 |
richard |
257 |
|
1486 |
richard |
258 |
# On interdit les connexions directes au port utilisé par tinyproxy (8090). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
|
|
|
259 |
# Deny direct connections on tinyproxy port (8090). The concerned paquets have been marked in mangle table (PREROUTING)
|
|
|
260 |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8090 -m mark --mark 2 -j REJECT --reject-with tcp-reset
|
|
|
261 |
|
|
|
262 |
# Autorisation des connexions légitimes vers tinyproxy
|
|
|
263 |
# Allow connections to tinyproxy
|
|
|
264 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8090 -m state --state NEW --syn -j ACCEPT
|
|
|
265 |
|
1962 |
richard |
266 |
# On interdit les connexions directes au port 54 (DNS-blacklist). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
|
|
|
267 |
# Deny direct connections on port 54 (DNS-blacklist). The concerned paquets are marked in mangle table (PREROUTING)
|
|
|
268 |
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 3 -j REJECT --reject-with icmp-port-unreachable
|
|
|
269 |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 54 -m mark --mark 3 -j REJECT --reject-with tcp-reset
|
791 |
richard |
270 |
|
1962 |
richard |
271 |
# On interdit les connexions directes au port 55 (DNS-whitelist). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
|
|
|
272 |
# Deny direct connections on port 55 (DNS-whitelist). The concerned paquets are marked in mangle table (PREROUTING)
|
|
|
273 |
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 55 -m mark --mark 4 -j REJECT --reject-with icmp-port-unreachable
|
|
|
274 |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 55 -m mark --mark 3 -j REJECT --reject-with tcp-reset
|
1364 |
richard |
275 |
|
1962 |
richard |
276 |
# On interdit les connexions directes au port 56 (DNS-Blackhole). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
|
|
|
277 |
# Deny direct connections on port 56 (DNS-blackhole). The concerned paquets are marked in mangle table (PREROUTING)
|
|
|
278 |
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 56 -m mark --mark 5 -j REJECT --reject-with icmp-port-unreachable
|
|
|
279 |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 56 -m mark --mark 3 -j REJECT --reject-with tcp-reset
|
1472 |
richard |
280 |
|
1364 |
richard |
281 |
# autorisation des connexion légitime à DNSMASQ (avec blacklist)
|
|
|
282 |
# Allow connections for DNSMASQ (with blacklist)
|
783 |
richard |
283 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
|
1962 |
richard |
284 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 54 -j ACCEPT
|
783 |
richard |
285 |
|
1364 |
richard |
286 |
# autorisation des connexion légitime à DNSMASQ (avec whitelist)
|
|
|
287 |
# Allow connections for DNSMASQ (with whitelist)
|
|
|
288 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT
|
1962 |
richard |
289 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 55 -j ACCEPT
|
1364 |
richard |
290 |
|
1472 |
richard |
291 |
# autorisation des connexion légitime à DNSMASQ (mode blackhole)
|
|
|
292 |
# Allow connections for DNSMASQ (blackhole mode)
|
|
|
293 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 56 -j ACCEPT
|
1962 |
richard |
294 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 56 -j ACCEPT
|
1472 |
richard |
295 |
|
783 |
richard |
296 |
# Accès direct aux services internes
|
|
|
297 |
# Internal services access
|
1962 |
richard |
298 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT # DNS
|
|
|
299 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport domain -j ACCEPT # DNS
|
786 |
richard |
300 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT # Réponse ping # ping responce
|
|
|
301 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT # Requête ping # ping request
|
|
|
302 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport https -j ACCEPT # Pages d'authentification et MCC # authentication pages and MCC
|
|
|
303 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport http -j ACCEPT # Page d'avertissement filtrage # Filtering warning pages
|
|
|
304 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 3990 -j ACCEPT # Requêtes de deconnexion usagers # Users logout requests
|
|
|
305 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport ntp -j ACCEPT # Serveur local de temps # local time server
|
783 |
richard |
306 |
|
|
|
307 |
# SSHD rules if activate
|
|
|
308 |
if [ $SSH = on ]
|
520 |
richard |
309 |
then
|
1731 |
richard |
310 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -m state --state NEW -j NFLOG --nflog-group 2 --nflog-prefix "RULE ssh-from-LAN -- ACCEPT"
|
783 |
richard |
311 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
|
1731 |
richard |
312 |
$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW --syn -j NFLOG --nflog-group 2 --nflog-prefix "RULE ssh-from-WAN -- ACCEPT"
|
1161 |
richard |
313 |
$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
|
520 |
richard |
314 |
fi
|
783 |
richard |
315 |
|
|
|
316 |
# Insertion de règles locales
|
|
|
317 |
# Here, we add local rules (i.e. VPN from Internet)
|
|
|
318 |
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
|
|
|
319 |
. /usr/local/etc/alcasar-iptables-local.sh
|
|
|
320 |
fi
|
|
|
321 |
|
|
|
322 |
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
|
|
|
323 |
# Deny and log on INPUT from the LAN
|
1704 |
richard |
324 |
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j NFLOG --nflog-prefix "RULE rej-int -- REJECT "
|
783 |
richard |
325 |
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
|
|
|
326 |
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
|
|
|
327 |
|
1393 |
richard |
328 |
# Interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
|
783 |
richard |
329 |
# Reject INTIF access (only when chilli is down)
|
1704 |
richard |
330 |
$IPTABLES -A INPUT -i $INTIF -j NFLOG --nflog-prefix "RULE Protect1 -- REJECT "
|
783 |
richard |
331 |
$IPTABLES -A INPUT -i $INTIF -j REJECT
|
|
|
332 |
|
|
|
333 |
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
|
|
|
334 |
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
|
1731 |
richard |
335 |
$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j NFLOG --nflog-group 3 --nflog-threshold 10 --nflog-prefix "RULE rej-ext -- DROP"
|
783 |
richard |
336 |
|
|
|
337 |
#############################
|
|
|
338 |
# FORWARD #
|
|
|
339 |
#############################
|
|
|
340 |
|
1872 |
richard |
341 |
# Blocage des IPs du SET bl_ip_blocked pour le SET havp_bl
|
|
|
342 |
# Deny IPs of the SET bl_ip_blocked for the set havp_bl
|
2187 |
richard |
343 |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set havp_bl src -m set --match-set bl_ip_blocked dst -p icmp -j REJECT --reject-with icmp-host-prohibited
|
|
|
344 |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set havp_bl src -m set --match-set bl_ip_blocked dst -p udp -j REJECT --reject-with icmp-host-prohibited
|
1872 |
richard |
345 |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set havp_bl src -m set --match-set bl_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset
|
1364 |
richard |
346 |
|
783 |
richard |
347 |
# Rejet des requêtes DNS vers Internet
|
|
|
348 |
# Deny forward DNS
|
|
|
349 |
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
|
|
|
350 |
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
|
|
|
351 |
|
2184 |
richard |
352 |
# Active le suivi de session
|
|
|
353 |
# Allow Conntrack
|
815 |
richard |
354 |
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
|
790 |
richard |
355 |
|
2006 |
raphael.pi |
356 |
# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
|
|
|
357 |
nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" " -f1`
|
|
|
358 |
if [ $nb_uamallowed != "0" ]
|
|
|
359 |
then
|
|
|
360 |
while read ip_allowed_line
|
1488 |
richard |
361 |
do
|
2006 |
raphael.pi |
362 |
ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
|
|
|
363 |
$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
|
|
|
364 |
$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
|
|
|
365 |
done < /usr/local/etc/alcasar-uamallowed
|
|
|
366 |
fi
|
492 |
franck |
367 |
|
2184 |
richard |
368 |
# filtrage protocole par utilisateur (profile 1 : http, https)
|
|
|
369 |
# protocols filtering for users (profil 1 : http, https)
|
|
|
370 |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_1 src -s $PRIVATE_NETWORK_MASK -p tcp -m multiport ! --dports http,https -m state --state NEW -j REJECT --reject-with tcp-reset
|
|
|
371 |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_1 src -s $PRIVATE_NETWORK_MASK -p udp -m multiport ! --dports http,https -m state --state NEW -j REJECT --reject-with icmp-port-unreachable
|
2006 |
raphael.pi |
372 |
|
2184 |
richard |
373 |
# filtrage protocole par utilisateur (profile 2 : http https pop3 pop3s imap imaps ftp sftp ssh)
|
|
|
374 |
# protocols filtering for users (profil 2 : http https pop3 pop3s imap imaps ftp sftp ssh)
|
2006 |
raphael.pi |
375 |
|
2184 |
richard |
376 |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_2 src -s $PRIVATE_NETWORK_MASK -p tcp -m multiport ! --dports http,https,pop3,pop3s,imap,imaps,ftp,ftp-data,sftp,ssh -m state --state NEW -j REJECT --reject-with tcp-reset
|
|
|
377 |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_2 src -s $PRIVATE_NETWORK_MASK -p udp -m multiport ! --dports http,https,pop3,pop3s,imap,imaps,ssh -m state --state NEW -j REJECT --reject-with icmp-port-unreachable
|
2006 |
raphael.pi |
378 |
|
2184 |
richard |
379 |
# filtrage protocole par utilisateur (profile 3 : personnalisable via l'ACC)
|
|
|
380 |
# protocols filtering for users (profil 3 : customized with ACC)
|
2006 |
raphael.pi |
381 |
#profile 3 personalisables via l'ACC
|
2184 |
richard |
382 |
custom_tcp_protocols_list='';custom_udp_protocols_list=''
|
2006 |
raphael.pi |
383 |
while read svc_line
|
|
|
384 |
do
|
|
|
385 |
svc_on=`echo $svc_line|cut -b1`
|
|
|
386 |
if [ $svc_on != "#" ]
|
|
|
387 |
then
|
|
|
388 |
svc_name=`echo $svc_line|cut -d" " -f1`
|
|
|
389 |
svc_port=`echo $svc_line|cut -d" " -f2`
|
|
|
390 |
if [ $svc_name = "icmp" ]
|
|
|
391 |
then
|
2184 |
richard |
392 |
svc_icmp="on"
|
2006 |
raphael.pi |
393 |
else
|
2184 |
richard |
394 |
if [ "$custom_tcp_protocols_list" == "" ]
|
|
|
395 |
then
|
|
|
396 |
custom_tcp_protocols_list=$svc_port
|
|
|
397 |
else
|
|
|
398 |
custom_tcp_protocols_list=`echo $custom_tcp_protocols_list","$svc_port`
|
|
|
399 |
fi
|
|
|
400 |
udp_svc=`egrep "[[:space:]]$svc_port/udp" /etc/services|wc -l`
|
|
|
401 |
if [ $udp_svc = "1" ] # udp service exist
|
|
|
402 |
then
|
|
|
403 |
if [ "$custom_udp_protocols_list" == "" ]
|
|
|
404 |
then
|
|
|
405 |
custom_udp_protocols_list=$svc_port
|
|
|
406 |
else
|
|
|
407 |
custom_udp_protocols_list=`echo $custom_udp_protocols_list","$svc_port`
|
|
|
408 |
fi
|
|
|
409 |
fi
|
1488 |
richard |
410 |
fi
|
2006 |
raphael.pi |
411 |
fi
|
|
|
412 |
done < /usr/local/etc/alcasar-services
|
2184 |
richard |
413 |
if [ "$custom_tcp_protocols_list" == "" ]
|
|
|
414 |
then
|
|
|
415 |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_3 src -s $PRIVATE_NETWORK_MASK -j REJECT
|
|
|
416 |
else
|
|
|
417 |
if [ "$svc_icmp" != "on" ]
|
|
|
418 |
then
|
|
|
419 |
$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
|
|
|
420 |
fi
|
|
|
421 |
$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 state --state NEW -j REJECT --reject-with tcp-reset
|
|
|
422 |
$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 state --state NEW -j REJECT --reject-with icmp-port-unreachable
|
|
|
423 |
fi
|
1488 |
richard |
424 |
|
2184 |
richard |
425 |
# journalisation et autorisation des connections sortant du LAN
|
476 |
richard |
426 |
# Allow forward connections with log
|
1159 |
crox53 |
427 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
|
859 |
richard |
428 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
|
1 |
root |
429 |
|
783 |
richard |
430 |
#############################
|
|
|
431 |
# OUTPUT #
|
|
|
432 |
#############################
|
1159 |
crox53 |
433 |
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
|
|
|
434 |
# Everything is allowed but traffic through outside network interface
|
2213 |
richard |
435 |
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
|
520 |
richard |
436 |
|
1587 |
richard |
437 |
# Si configéré, on autorise les requêtes DHCP
|
|
|
438 |
# Allow DHCP requests if configured
|
|
|
439 |
public_ip_mask=`grep ^PUBLIC_IP= $CONF_FILE|cut -d"=" -f2` # ALCASAR WAN IP address
|
|
|
440 |
if [[ "$public_ip_mask" == "dhcp" ]]
|
|
|
441 |
then
|
|
|
442 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport 67 -j ACCEPT
|
|
|
443 |
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport 67 -j ACCEPT
|
|
|
444 |
fi
|
|
|
445 |
|
503 |
richard |
446 |
# On autorise les requêtes DNS vers les serveurs DNS identifiés
|
498 |
richard |
447 |
# Allow DNS requests to identified DNS servers
|
|
|
448 |
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
|
783 |
richard |
449 |
|
615 |
richard |
450 |
# On autorise les requêtes HTTP sortantes
|
498 |
richard |
451 |
# HTTP requests are allowed
|
1159 |
crox53 |
452 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
|
498 |
richard |
453 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
|
783 |
richard |
454 |
|
2259 |
tom.houday |
455 |
# On autorise les requêtes HTTPS sortantes
|
|
|
456 |
# HTTPS requests are allowed
|
|
|
457 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport https -j ACCEPT
|
|
|
458 |
|
1862 |
raphael.pi |
459 |
# On autorise les requêtes RSYNC sortantes (maj BL de Toulouse)
|
|
|
460 |
# RSYNC requests are allowed (to update BL of Toulouse)
|
|
|
461 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport rsync -j ACCEPT
|
|
|
462 |
|
784 |
richard |
463 |
# On autorise les requêtes FTP
|
|
|
464 |
# FTP requests are allowed
|
1705 |
richard |
465 |
modprobe nf_conntrack_ftp
|
784 |
richard |
466 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
|
1159 |
crox53 |
467 |
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
|
784 |
richard |
468 |
|
615 |
richard |
469 |
# On autorise les requêtes NTP
|
498 |
richard |
470 |
# NTP requests are allowed
|
|
|
471 |
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
|
783 |
richard |
472 |
|
503 |
richard |
473 |
# On autorise les requêtes ICMP (ping)
|
|
|
474 |
# ICMP (ping) requests are allowed
|
|
|
475 |
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
|
783 |
richard |
476 |
|
615 |
richard |
477 |
# On autorise les requêtes LDAP si un serveur externe est configué
|
|
|
478 |
# LDAP requests are allowed if an external server is declared
|
|
|
479 |
if [ $LDAP = on ]
|
|
|
480 |
then
|
694 |
franck |
481 |
$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
|
|
|
482 |
$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
|
615 |
richard |
483 |
fi
|
783 |
richard |
484 |
|
|
|
485 |
#############################
|
|
|
486 |
# POSTROUTING #
|
|
|
487 |
#############################
|
498 |
richard |
488 |
# Traduction dynamique d'adresse en sortie
|
476 |
richard |
489 |
# Dynamic NAT on EXTIF
|
1 |
root |
490 |
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
|
|
|
491 |
|
476 |
richard |
492 |
# End of script
|
1 |
root |
493 |
|