872 |
richard |
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#!/bin/bash
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64 |
franck |
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# $Id: alcasar-iptables.sh 1855 2016-05-02 09:44:08Z raphael.pion $
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richard |
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# Script de mise en place des regles du parefeu d'Alcasar (mode normal)
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1339 |
richard |
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# This script writes the netfilter rules for ALCASAR
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richard |
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# Rexy - 3abtux - CPN
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#
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# Reminders
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richard |
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# There are four channels for log :
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1294 |
richard |
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# 1 tracability of the consultation equipment with The 'Netflow' kernel module (iptables target = NETFLOW);
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1221 |
richard |
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# 2 protection of ALCASAR with the Ulog group 1 (default group)
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1294 |
richard |
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# 3 SSH on ALCASAR with the Ulog group 2;
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# 4 extern access attempts on ALCASAR with the Ulog group 3.
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1469 |
richard |
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# The bootps/dhcp (67) port is always open on tun0/INTIF by coova
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CONF_FILE="/usr/local/etc/alcasar.conf"
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richard |
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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 |
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private_ip_mask=`grep ^PRIVATE_IP= $CONF_FILE|cut -d"=" -f2`
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richard |
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private_ip_mask=${private_ip_mask:=192.168.182.1/24}
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783 |
richard |
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PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1` # ALCASAR LAN IP address
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604 |
richard |
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private_network=`/bin/ipcalc -n $private_ip_mask|cut -d"=" -f2` # LAN IP address (ie.: 192.168.182.0)
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private_prefix=`/bin/ipcalc -p $private_ip_mask|cut -d"=" -f2` # LAN prefix (ie. 24)
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783 |
richard |
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PRIVATE_NETWORK_MASK=$private_network/$private_prefix # Lan IP address + prefix (192.168.182.0/24)
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richard |
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public_ip_mask=`grep ^PUBLIC_IP= $CONF_FILE|cut -d"=" -f2` # ALCASAR WAN IP address
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richard |
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if [[ "$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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richard |
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public_ip_mask=`ip addr show $EXTIF | egrep -o $PTN`
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richard |
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fi
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richard |
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PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1`
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richard |
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dns1=`grep ^DNS1= $CONF_FILE|cut -d"=" -f2`
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dns2=`grep ^DNS2= $CONF_FILE|cut -d"=" -f2`
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richard |
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dns1=${dns1:=208.67.220.220}
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dns2=${dns2:=208.67.222.222}
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richard |
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DNSSERVERS="$dns1,$dns2" # first and second public DNS servers
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richard |
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PROTOCOLS_FILTERING=`grep ^PROTOCOLS_FILTERING= $CONF_FILE|cut -d"=" -f2` # Network protocols filter (on/off)
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richard |
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PROTOCOLS_FILTERING=${PROTOCOLS_FILTERING:=off}
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richard |
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BL_IP_CAT="/usr/local/share/iptables-bl-enabled" # categories files of the BlackListed IP
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richard |
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BL_IP_OSSI="/usr/local/share/iptables-bl/ossi" # ossi categoty
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raphael.pi |
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DIR_WL_IP_ENABLED="/usr/local/share/iptables-wl-enabled/" # ip files repository of the WL (feature : imported wl file from ACC)
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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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richard |
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SSH=`grep ^SSH= $CONF_FILE|cut -d"=" -f2` # sshd active (on/off)
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richard |
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SSH=${SSH:=off}
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richard |
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SSH_ADMIN_FROM=`grep ^SSH_ADMIN_FROM= $CONF_FILE|cut -d"=" -f2`
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richard |
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SSH_ADMIN_FROM=${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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richard |
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LDAP=`grep ^LDAP= $CONF_FILE|cut -d"=" -f2` # LDAP external server active (on/off)
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richard |
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LDAP=${LDAP:=off}
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richard |
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LDAP_IP=`grep ^LDAP_IP= $CONF_FILE|cut -d"=" -f2` # WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)
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richard |
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LDAP_IP=${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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richard |
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IP_REHABILITEES="/etc/dansguardian/lists/exceptioniplist" # Rehabilitated IP
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richard |
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SAVE_DIR="/etc/sysconfig" # Saving path
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root |
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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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ipset list no_filtering_set 1>/dev/null 2>&1
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if [ $? -eq 0 ];
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then
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ipset save no_filtering_set > $TMP_users_set_save
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ipset save havp_set >> $TMP_users_set_save
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ipset save havp_bl_set >> $TMP_users_set_save
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ipset save havp_wl_set >> $TMP_users_set_save
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raphael.pi |
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ipset save user_not_connected_yet >> $TMP_users_set_save
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raphael.pi |
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ipset save ipset_users_list >> $TMP_users_set_save
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richard |
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fi
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richard |
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# loading of NetFlow probe (ipt_NETFLOW kernel module)
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crox53 |
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modprobe ipt_NETFLOW destination=127.0.0.1:2055
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richard |
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# Effacement des règles existantes
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richard |
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# Flush all existing rules
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root |
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$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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$IPTABLES -F OUTPUT
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richard |
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# Suppression des chaines utilisateurs sur les tables filter et nat
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# Flush non default rules on filter and nat tables
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$IPTABLES -X
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$IPTABLES -t nat -X
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# Stratégies par défaut
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richard |
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# Default policies
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root |
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$IPTABLES -P INPUT DROP
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$IPTABLES -P FORWARD DROP
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richard |
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$IPTABLES -P OUTPUT DROP
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root |
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$IPTABLES -t nat -P PREROUTING ACCEPT
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$IPTABLES -t nat -P POSTROUTING ACCEPT
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$IPTABLES -t nat -P OUTPUT ACCEPT
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richard |
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#############################
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# IPSET #
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#############################
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richard |
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# destruction de tous les SET
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richard |
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# destroy all SET
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richard |
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ipset destroy
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raphael.pi |
102 |
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raphael.pi |
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ipset flush blacklist_ip_blocked
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ipset destroy blacklist_ip_blocked
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ipset flush whitelist_ip_allowed
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ipset destroy whitelist_ip_allowed
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richard |
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###### BL set ###########
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# Calcul de la taille / Compute the length
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richard |
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bl_set_length=$(($(wc -l $BL_IP_CAT/* | awk '{print $1}' | tail -n 1)+$(wc -l $BL_IP_OSSI | awk '{print $1}')))
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richard |
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# Chargement / loading
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richard |
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echo "create blacklist_ip_blocked hash:net family inet hashsize 1024 maxelem $bl_set_length" > $TMP_set_save
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for category in `ls -1 $BL_IP_CAT | cut -d '@' -f1`
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richard |
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do
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richard |
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cat $BL_IP_CAT/$category >> $TMP_set_save
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richard |
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done
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richard |
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cat $BL_IP_OSSI >> $TMP_set_save
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ipset -! restore < $TMP_set_save
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rm -f $TMP_set_save
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richard |
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# Suppression des ip réhabilitées / Removing of rehabilitated ip
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richard |
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for ip in $(cat $IP_REHABILITEES)
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do
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ipset del blacklist_ip_blocked $ip
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done
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richard |
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###### WL set ###########
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# Calcul de la taille / Compute the length
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raphael.pi |
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wl_set_length=$(($(wc -l $DIR_WL_IP_ENABLED/* | awk '{print $1}' | tail -n 1)*3))
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richard |
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# Chargement Loading
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richard |
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echo "create whitelist_ip_allowed hash:net family inet hashsize 1024 maxelem $wl_set_length" > $TMP_set_save
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raphael.pi |
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#get ip-wl files from ACC
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for ossi in `ls -1 $DIR_WL_IP_ENABLED`
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do
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cat $DIR_WL_IP_ENABLED/$ossi >> $TMP_set_save
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done
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richard |
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ipset -! restore < $TMP_set_save
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rm -f $TMP_set_save
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# Restoration des SET des utilisateurs connectés si ils existent sinon création des SET
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richard |
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# Restoring the connected users SETs if available, otherwise creating SETs
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richard |
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if [ -e $TMP_users_set_save ];
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then
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ipset -! restore < $TMP_users_set_save
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rm -f $TMP_users_set_save
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else
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ipset create no_filtering_set hash:net hashsize 1024
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ipset create havp_set hash:net hashsize 1024
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ipset create havp_bl_set hash:net hashsize 1024
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ipset create havp_wl_set hash:net hashsize 1024
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raphael.pi |
149 |
#utilisé pour l'interception des utilisateurs non authentifiés au réseau
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#used for intercepting users not connected to the network
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ipset create user_not_connected_yet hash:net hashsize 1024
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ipset create ipset_users_list list:set
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ipset add ipset_users_list havp_set
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ipset add ipset_users_list havp_wl_set
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ipset add ipset_users_list havp_bl_set
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ipset add ipset_users_list no_filtering_set
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ipset add ipset_users_list user_not_connected_yet
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richard |
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fi
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richard |
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#############################
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richard |
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# PREROUTING #
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richard |
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#############################
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raphael.pi |
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# Redirection des requetes DNS des utilisateurs non connectés dans le DNS-Blackhole
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# Redirect users not connected DNS requests in DNS-Blackhole
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$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set ! --match-set ipset_users_list src -d $PRIVATE_IP -p tcp --dport domain -j REDIRECT --to-port 56
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$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set ! --match-set ipset_users_list src -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 56
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1453 |
franck |
170 |
# Marquage des paquets qui tentent d'accéder directement à un serveur sans authentification en mode proxy pour pouvoir les rejeter en INPUT
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# Mark packets that attempt to directly access a server without authentication with proxy client to reject them in INPUT rules
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franck |
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#$IPTABLES -A PREROUTING -t mangle -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp -m tcp --dport 80 -m string --string 'GET http' --algo bm --from 50 --to 70 -j MARK --set-mark 10
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franck |
173 |
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richard |
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# Marquage (et journalisation) des paquets qui tentent d'accéder directement au 8080 (DansGuardian) pour pouvoir les rejeter en INPUT
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783 |
richard |
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# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules
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1731 |
richard |
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$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j NFLOG --nflog-prefix "RULE direct-proxy -- DENY "
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783 |
richard |
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$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1
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root |
178 |
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1486 |
richard |
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# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8090 (tinyproxy) pour pouvoir les rejeter en INPUT
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# Mark (and log) the 8090 direct attempts to REJECT them in INPUT rules
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1704 |
richard |
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$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8090 -j NFLOG --nflog-prefix "RULE direct-proxy -- DENY "
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1486 |
richard |
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$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8090 -j MARK --set-mark 2
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1484 |
richard |
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# Marquage des paquets qui tentent d'accéder directement au port udp 54 (DNS-blacklist) pour pouvoir les rejeter en INPUT
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# Mark the udp 54 direct attempts (DNS-blacklist) to REJECT them in INPUT rules
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1486 |
richard |
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$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 3
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783 |
richard |
187 |
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1484 |
richard |
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# Marquage des paquets qui tentent d'accéder directement au port udp 55 (DNS-Whitelist) pour pouvoir les rejeter en INPUT
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# Mark the udp 55 direct attempts (DNS-whitelist) to REJECT them in INPUT rules
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1486 |
richard |
190 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 55 -j MARK --set-mark 4
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783 |
richard |
191 |
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1484 |
richard |
192 |
# Marquage des paquets qui tentent d'accéder directement au port udp 56 (DNS-Blackhole) pour pouvoir les rejeter en INPUT
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# Mark the udp 56 direct attempts (DNS-blackhole) to REJECT them in INPUT rules
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1486 |
richard |
194 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 56 -j MARK --set-mark 5
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1472 |
richard |
195 |
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1544 |
richard |
196 |
# redirection DNS des usagers 'havp_bl' vers le port 54
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# redirect DNS of 'havp_bl' users to port 54
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1364 |
richard |
198 |
$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
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1393 |
richard |
199 |
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1544 |
richard |
200 |
# redirection DNS des usagers 'havp_wl' vers le port 55
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# redirect DNS of 'havp_bl' users to port 55
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1364 |
richard |
202 |
$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
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203 |
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1544 |
richard |
204 |
# Journalisation HTTP_Internet des usagers 'havp_bl' (paquets SYN uniquement). Les autres protocoles sont journalisés en FORWARD par netflow.
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205 |
# Log Internet HTTP of 'havp_bl' users" (only syn packets). Other protocols are logged in FORWARD by netflow
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1704 |
richard |
206 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl_set src ! -d $PRIVATE_IP -p tcp --dport http -m state --state NEW -j NFLOG --nflog-prefix "RULE F_http -- ACCEPT "
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1544 |
richard |
207 |
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208 |
# Redirection HTTP des usagers 'havp_bl' cherchant à joindre les IP de la blacklist vers ALCASAR (page 'accès interdit')
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209 |
# Redirect HTTP of 'havp_bl' users who want blacklist IP to ALCASAR ('access denied' page)
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1364 |
richard |
210 |
$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
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211 |
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1544 |
richard |
212 |
# 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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213 |
# Redirect HTTP of 'havp_wl' users who want IP not in the WL to ALCASAR ('access denied' page)
|
1393 |
richard |
214 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl_set src -m set ! --match-set whitelist_ip_allowed dst -p tcp --dport http -j REDIRECT --to-port 80
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215 |
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1544 |
richard |
216 |
# Redirection des requêtes HTTP sortantes des usagers 'havp_bl' vers DansGuardian
|
1484 |
richard |
217 |
# Redirect outbound HTTP requests of "BL" users to DansGuardian (transparent proxy)
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218 |
$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
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219 |
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1544 |
richard |
220 |
# Redirection des requêtes HTTP sortantes des usager 'havp_wl' et 'havp' vers Tinyproxy
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1486 |
richard |
221 |
# Redirect outbound HTTP requests for "WL-antivirus" users to Tinyproxy
|
1484 |
richard |
222 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl_set src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8090
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1544 |
richard |
223 |
$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 8090
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1364 |
richard |
224 |
|
783 |
richard |
225 |
# Redirection des requêtes NTP vers le serveur NTP local
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226 |
# Redirect NTP request in local NTP server
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227 |
$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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228 |
|
472 |
richard |
229 |
#############################
|
783 |
richard |
230 |
# INPUT #
|
472 |
richard |
231 |
#############################
|
871 |
richard |
232 |
|
783 |
richard |
233 |
# Tout passe sur loopback
|
|
|
234 |
# accept all on loopback
|
|
|
235 |
$IPTABLES -A INPUT -i lo -j ACCEPT
|
990 |
franck |
236 |
$IPTABLES -A OUTPUT -o lo -j ACCEPT
|
783 |
richard |
237 |
|
|
|
238 |
# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
|
|
|
239 |
# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)
|
472 |
richard |
240 |
$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP
|
|
|
241 |
$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
|
|
|
242 |
$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP
|
|
|
243 |
$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
|
675 |
richard |
244 |
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP
|
498 |
richard |
245 |
|
1587 |
richard |
246 |
# Si configéré, on autorise les réponses DHCP
|
|
|
247 |
# Allow DHCP answers if configured
|
|
|
248 |
public_ip_mask=`grep ^PUBLIC_IP= $CONF_FILE|cut -d"=" -f2` # ALCASAR WAN IP address
|
|
|
249 |
if [[ "$public_ip_mask" == "dhcp" ]]
|
|
|
250 |
then
|
|
|
251 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport 68 -j ACCEPT
|
|
|
252 |
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport 68 -j ACCEPT
|
|
|
253 |
fi
|
871 |
richard |
254 |
# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)
|
|
|
255 |
# Drop broadcast & multicast on EXTIF to avoid log
|
1629 |
richard |
256 |
$IPTABLES -A INPUT -m addrtype --dst-type BROADCAST,MULTICAST -j DROP
|
498 |
richard |
257 |
|
783 |
richard |
258 |
# On autorise les retours de connexions légitimes par INPUT
|
|
|
259 |
# Conntrack on INPUT
|
|
|
260 |
$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
|
373 |
richard |
261 |
|
1221 |
richard |
262 |
# 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 |
263 |
# Deny direct connections on DansGuardian port (8080). The concerned paquets have been marked and logged in mangle table (PREROUTING)
|
783 |
richard |
264 |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset
|
791 |
richard |
265 |
|
783 |
richard |
266 |
# Autorisation des connexions légitimes à DansGuardian
|
|
|
267 |
# Allow connections for DansGuardian
|
|
|
268 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT
|
373 |
richard |
269 |
|
1486 |
richard |
270 |
# On interdit les connexions directes au port utilisé par tinyproxy (8090). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)
|
|
|
271 |
# Deny direct connections on tinyproxy port (8090). The concerned paquets have been marked in mangle table (PREROUTING)
|
|
|
272 |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8090 -m mark --mark 2 -j REJECT --reject-with tcp-reset
|
|
|
273 |
|
|
|
274 |
# Autorisation des connexions légitimes vers tinyproxy
|
|
|
275 |
# Allow connections to tinyproxy
|
|
|
276 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8090 -m state --state NEW --syn -j ACCEPT
|
|
|
277 |
|
1472 |
richard |
278 |
# On interdit les connexions directes au port UDP 54 (DNS-blacklist). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
|
|
|
279 |
# Deny direct connections on UDP 54 (DNS-blacklist). The concerned paquets are marked in mangle table (PREROUTING)
|
1486 |
richard |
280 |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 54 -m mark --mark 3 -j REJECT --reject-with icmp-port-unreachable
|
791 |
richard |
281 |
|
1472 |
richard |
282 |
# On interdit les connexions directes au port UDP 55 (DNS-whitelist). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
|
|
|
283 |
# Deny direct connections on UDP 55 (DNS-whitelist). The concerned paquets are marked in mangle table (PREROUTING)
|
1486 |
richard |
284 |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 55 -m mark --mark 4 -j REJECT --reject-with icmp-port-unreachable
|
1364 |
richard |
285 |
|
1472 |
richard |
286 |
# On interdit les connexions directes au port UDP 56 (DNS-Blackhole). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
|
|
|
287 |
# Deny direct connections on UDP 56 (DNS-blackhole). The concerned paquets are marked in mangle table (PREROUTING)
|
1486 |
richard |
288 |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 56 -m mark --mark 5 -j REJECT --reject-with icmp-port-unreachable
|
1472 |
richard |
289 |
|
1364 |
richard |
290 |
# autorisation des connexion légitime à DNSMASQ (avec blacklist)
|
|
|
291 |
# Allow connections for DNSMASQ (with blacklist)
|
783 |
richard |
292 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
|
|
|
293 |
|
1364 |
richard |
294 |
# autorisation des connexion légitime à DNSMASQ (avec whitelist)
|
|
|
295 |
# Allow connections for DNSMASQ (with whitelist)
|
|
|
296 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT
|
|
|
297 |
|
1472 |
richard |
298 |
# autorisation des connexion légitime à DNSMASQ (mode blackhole)
|
|
|
299 |
# Allow connections for DNSMASQ (blackhole mode)
|
|
|
300 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 56 -j ACCEPT
|
|
|
301 |
|
783 |
richard |
302 |
# Accès direct aux services internes
|
|
|
303 |
# Internal services access
|
1364 |
richard |
304 |
$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 |
305 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT # Réponse ping # ping responce
|
|
|
306 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT # Requête ping # ping request
|
|
|
307 |
$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
|
|
|
308 |
$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
|
|
|
309 |
$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
|
|
|
310 |
$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 |
311 |
|
|
|
312 |
# SSHD rules if activate
|
|
|
313 |
if [ $SSH = on ]
|
520 |
richard |
314 |
then
|
1731 |
richard |
315 |
$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 |
316 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT
|
1731 |
richard |
317 |
$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 |
318 |
$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPT
|
520 |
richard |
319 |
fi
|
783 |
richard |
320 |
|
|
|
321 |
# Insertion de règles locales
|
|
|
322 |
# Here, we add local rules (i.e. VPN from Internet)
|
|
|
323 |
if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then
|
|
|
324 |
. /usr/local/etc/alcasar-iptables-local.sh
|
|
|
325 |
fi
|
|
|
326 |
|
|
|
327 |
# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN
|
|
|
328 |
# Deny and log on INPUT from the LAN
|
1704 |
richard |
329 |
$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j NFLOG --nflog-prefix "RULE rej-int -- REJECT "
|
783 |
richard |
330 |
$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
|
|
|
331 |
$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
|
|
|
332 |
|
1393 |
richard |
333 |
# Interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).
|
783 |
richard |
334 |
# Reject INTIF access (only when chilli is down)
|
1704 |
richard |
335 |
$IPTABLES -A INPUT -i $INTIF -j NFLOG --nflog-prefix "RULE Protect1 -- REJECT "
|
783 |
richard |
336 |
$IPTABLES -A INPUT -i $INTIF -j REJECT
|
|
|
337 |
|
|
|
338 |
# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)
|
|
|
339 |
# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)
|
1731 |
richard |
340 |
$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 |
341 |
|
|
|
342 |
#############################
|
|
|
343 |
# FORWARD #
|
|
|
344 |
#############################
|
|
|
345 |
|
1364 |
richard |
346 |
# Blocage des IPs du SET blacklist_ip_blocked pour le SET havp_bl_set
|
|
|
347 |
# Deny IPs of the SET blacklist_ip_blocked for the set havp_bl_set
|
|
|
348 |
$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
|
|
|
349 |
$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
|
|
|
350 |
$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
|
|
|
351 |
|
783 |
richard |
352 |
# Rejet des requêtes DNS vers Internet
|
|
|
353 |
# Deny forward DNS
|
|
|
354 |
$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable
|
|
|
355 |
$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset
|
|
|
356 |
|
815 |
richard |
357 |
# Autorisation des retours de connexions légitimes
|
|
|
358 |
$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
|
790 |
richard |
359 |
|
1364 |
richard |
360 |
# If protocols filter is activate
|
1488 |
richard |
361 |
if [ $PROTOCOLS_FILTERING = on ]; then
|
|
|
362 |
# Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)
|
|
|
363 |
nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" " -f1`
|
|
|
364 |
if [ $nb_uamallowed != "0" ]
|
|
|
365 |
then
|
|
|
366 |
while read ip_allowed_line
|
|
|
367 |
do
|
|
|
368 |
ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`
|
1704 |
richard |
369 |
$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NFLOG --nflog-prefix "RULE IP-allowed -- ACCEPT "
|
1488 |
richard |
370 |
$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW
|
|
|
371 |
$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT
|
|
|
372 |
done < /usr/local/etc/alcasar-uamallowed
|
|
|
373 |
fi
|
|
|
374 |
# Autorisation du HTTP et des protocoles non commentés
|
|
|
375 |
# Allow HTTP and non comment protocols
|
1704 |
richard |
376 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport http -m state --state NEW -j NFLOG --nflog-prefix "RULE F_TCP-$svc_name -- ACCEPT "
|
1488 |
richard |
377 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport http -m state --state NEW -j NETFLOW
|
|
|
378 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport http -m state --state NEW -j ACCEPT
|
|
|
379 |
while read svc_line
|
|
|
380 |
do
|
|
|
381 |
svc_on=`echo $svc_line|cut -b1`
|
|
|
382 |
if [ $svc_on != "#" ]
|
|
|
383 |
then
|
|
|
384 |
svc_name=`echo $svc_line|cut -d" " -f1`
|
|
|
385 |
svc_port=`echo $svc_line|cut -d" " -f2`
|
|
|
386 |
if [ $svc_name = "icmp" ]
|
|
|
387 |
then
|
|
|
388 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
|
|
|
389 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
|
|
|
390 |
else
|
492 |
franck |
391 |
|
1704 |
richard |
392 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NFLOG --nflog-prefix "RULE F_TCP-$svc_name -- ACCEPT "
|
1488 |
richard |
393 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
|
|
|
394 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
|
1704 |
richard |
395 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NFLOG --nflog-prefix "RULE F_UDP-$svc_name -- ACCEPT "
|
1488 |
richard |
396 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
|
|
|
397 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
|
|
|
398 |
fi
|
|
|
399 |
fi
|
|
|
400 |
done < /usr/local/etc/alcasar-services
|
|
|
401 |
# Rejet explicite des autres protocoles
|
|
|
402 |
# reject the others protocols
|
1704 |
richard |
403 |
$IPTABLES -A FORWARD -i $TUNIF -j NFLOG --nflog-prefix "RULE F_filter -- REJECT "
|
1488 |
richard |
404 |
$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
|
|
|
405 |
$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
|
|
|
406 |
$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
|
|
|
407 |
fi
|
|
|
408 |
|
498 |
richard |
409 |
# Autorisation des connections sortant du LAN
|
476 |
richard |
410 |
# Allow forward connections with log
|
1221 |
richard |
411 |
#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "
|
1159 |
crox53 |
412 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW
|
859 |
richard |
413 |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT
|
1 |
root |
414 |
|
783 |
richard |
415 |
#############################
|
|
|
416 |
# OUTPUT #
|
|
|
417 |
#############################
|
1159 |
crox53 |
418 |
# On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur
|
|
|
419 |
# Everything is allowed but traffic through outside network interface
|
498 |
richard |
420 |
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT
|
520 |
richard |
421 |
|
1587 |
richard |
422 |
# Si configéré, on autorise les requêtes DHCP
|
|
|
423 |
# Allow DHCP requests if configured
|
|
|
424 |
public_ip_mask=`grep ^PUBLIC_IP= $CONF_FILE|cut -d"=" -f2` # ALCASAR WAN IP address
|
|
|
425 |
if [[ "$public_ip_mask" == "dhcp" ]]
|
|
|
426 |
then
|
|
|
427 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport 67 -j ACCEPT
|
|
|
428 |
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport 67 -j ACCEPT
|
|
|
429 |
fi
|
|
|
430 |
|
503 |
richard |
431 |
# On autorise les requêtes DNS vers les serveurs DNS identifiés
|
498 |
richard |
432 |
# Allow DNS requests to identified DNS servers
|
|
|
433 |
$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT
|
783 |
richard |
434 |
|
615 |
richard |
435 |
# On autorise les requêtes HTTP sortantes
|
498 |
richard |
436 |
# HTTP requests are allowed
|
1159 |
crox53 |
437 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW
|
498 |
richard |
438 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT
|
783 |
richard |
439 |
|
784 |
richard |
440 |
# On autorise les requêtes FTP
|
|
|
441 |
# FTP requests are allowed
|
1705 |
richard |
442 |
modprobe nf_conntrack_ftp
|
784 |
richard |
443 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT
|
1159 |
crox53 |
444 |
$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
|
784 |
richard |
445 |
|
615 |
richard |
446 |
# On autorise les requêtes NTP
|
498 |
richard |
447 |
# NTP requests are allowed
|
|
|
448 |
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT
|
783 |
richard |
449 |
|
503 |
richard |
450 |
# On autorise les requêtes ICMP (ping)
|
|
|
451 |
# ICMP (ping) requests are allowed
|
|
|
452 |
$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT
|
783 |
richard |
453 |
|
615 |
richard |
454 |
# On autorise les requêtes LDAP si un serveur externe est configué
|
|
|
455 |
# LDAP requests are allowed if an external server is declared
|
|
|
456 |
if [ $LDAP = on ]
|
|
|
457 |
then
|
694 |
franck |
458 |
$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
|
|
|
459 |
$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT
|
615 |
richard |
460 |
fi
|
783 |
richard |
461 |
|
|
|
462 |
#############################
|
|
|
463 |
# POSTROUTING #
|
|
|
464 |
#############################
|
498 |
richard |
465 |
# Traduction dynamique d'adresse en sortie
|
476 |
richard |
466 |
# Dynamic NAT on EXTIF
|
1 |
root |
467 |
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE
|
|
|
468 |
|
476 |
richard |
469 |
# End of script
|
1 |
root |
470 |
|