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#!/bin/bash
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#!/bin/bash
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# $Id: alcasar-iptables.sh 2674 2018-12-13 18:15:20Z lucas.echard $
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# $Id: alcasar-iptables.sh 2688 2019-01-18 23:15:49Z lucas.echard $
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# Script de mise en place des regles du parefeu d'Alcasar (mode normal)
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# Script de mise en place des regles du parefeu d'Alcasar (mode normal)
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# This script writes the netfilter rules for ALCASAR
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# This script writes the netfilter rules for ALCASAR
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# Rexy - 3abtux - CPN
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# Rexy - 3abtux - CPN
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#
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#
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# Reminders
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# Reminders
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dns1=`grep ^DNS1= $CONF_FILE|cut -d"=" -f2`
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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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dns2=`grep ^DNS2= $CONF_FILE|cut -d"=" -f2`
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dns1=${dns1:=208.67.220.220}
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dns1=${dns1:=208.67.220.220}
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dns2=${dns2:=208.67.222.222}
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dns2=${dns2:=208.67.222.222}
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DNSSERVERS="$dns1,$dns2"						# first and second public DNS servers
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DNSSERVERS="$dns1,$dns2"						# first and second public DNS servers
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INT_DNS_IP=`grep INT_DNS_IP $CONF_FILE|cut -d"=" -f2`			# Adresse du serveur DNS interne
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INT_DNS_ACTIVE=`grep INT_DNS_ACTIVE $CONF_FILE|cut -d"=" -f2`	# Activation de la redirection DNS interne
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BL_IP_CAT="/usr/local/share/iptables-bl-enabled"			# categories files of the BlackListed IP
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BL_IP_CAT="/usr/local/share/iptables-bl-enabled"			# categories files of the BlackListed IP
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WL_IP_CAT="/usr/local/share/iptables-wl-enabled"			# categories files of the WhiteListed IP
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WL_IP_CAT="/usr/local/share/iptables-wl-enabled"			# categories files of the WhiteListed IP
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TMP_users_set_save="/tmp/users_set_save"				# tmp file for backup users set
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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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TMP_set_save="/tmp/ipset_save"						# tmp file for blacklist and whitelist creation
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SSH=`grep ^SSH= $CONF_FILE|cut -d"=" -f2`				# sshd active (on/off)
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SSH=`grep ^SSH= $CONF_FILE|cut -d"=" -f2`				# sshd active (on/off)
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SSH_ADMIN_FROM=${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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SSH_ADMIN_FROM=${SSH_ADMIN_FROM:="0.0.0.0/0.0.0.0"}			# WAN IP address to reduce ssh access (all ip allowed on LAN side)
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IPTABLES="/sbin/iptables"
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IPTABLES="/sbin/iptables"
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IP_REHABILITEES="/etc/e2guardian/lists/exceptioniplist"		# Rehabilitated IP
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IP_REHABILITEES="/etc/e2guardian/lists/exceptioniplist"		# Rehabilitated IP
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SITE_DIRECT="/usr/local/etc/alcasar-site-direct"			# Site Direct (no havp and no filtrage) for user BL
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SITE_DIRECT="/usr/local/etc/alcasar-site-direct"			# Site Direct (no havp and no filtrage) for user BL
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# Allow requests to internal DNS if activated
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if [ "$INT_DNS_ACTIVE" = "on" ]
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then
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	DNSSERVERS="$DNSSERVERS,$INT_DNS_IP"
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fi
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# Sauvegarde des SET des utilisateurs connectés si ils existent
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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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# Saving SET of connected users if it exists
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ipset list not_filtered 1>/dev/null 2>&1
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ipset list not_filtered 1>/dev/null 2>&1
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if [ $? -eq 0 ];
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if [ $? -eq 0 ];
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then
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then
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ipset -! restore < $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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rm -f $TMP_set_save
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# Suppression des ip réhabilitées / Removing of rehabilitated ip
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# Suppression des ip réhabilitées / Removing of rehabilitated ip
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for ip in $(cat $IP_REHABILITEES)
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for ip in $(cat $IP_REHABILITEES)
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do
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do
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	ipset del bl_ip_blocked $ip
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	ipset -q del bl_ip_blocked $ip
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done
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done
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# rajout exception havp_bl --> Site en direct pour les Utilisateurs filtrés
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# rajout exception havp_bl --> Site en direct pour les Utilisateurs filtrés
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ipset create site_direct hash:net hashsize 1024
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ipset create site_direct hash:net hashsize 1024
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for site in $(cat $SITE_DIRECT)
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for site in $(cat $SITE_DIRECT)
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do
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do
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        ipset add site_direct $site
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    ipset add site_direct $site
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done
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done
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###### WL set  ###########
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###### WL set  ###########
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# taille fixe, car peupler par dnsmasq / fixe length due to dnsmasq dynamic loading
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# taille fixe, car peuplé par dnsmasq / fixe length due to dnsmasq dynamic loading
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wl_set_length=65536
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wl_set_length=65536
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# Chargement Loading
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# Chargement Loading
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echo "create wl_ip_allowed hash:net family inet hashsize 1024 maxelem $wl_set_length" > $TMP_set_save
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echo "create wl_ip_allowed hash:net family inet hashsize 1024 maxelem $wl_set_length" > $TMP_set_save
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#get ip-wl files from ACC
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#get ip-wl files from ACC
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for category in `ls -1 $WL_IP_CAT |cut -d '@' -f1`
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for category in `ls -1 $WL_IP_CAT |cut -d '@' -f1`
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# On interdit les connexions directes au port 56 (DNS-Blackhole). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
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# On interdit les connexions directes au port 56 (DNS-Blackhole). Les packets concernés ont été marqués dans la table mangle (PREROUTING)
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# Deny direct connections on port 56 (DNS-blackhole). The concerned paquets are marked in mangle table (PREROUTING)
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# Deny direct connections on port 56 (DNS-blackhole). The concerned paquets are marked in mangle table (PREROUTING)
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$IPTABLES -A INPUT -i $TUNIF -p udp --dport 56 -m mark --mark 5 -j REJECT --reject-with icmp-port-unreachable
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$IPTABLES -A INPUT -i $TUNIF -p udp --dport 56 -m mark --mark 5 -j REJECT --reject-with icmp-port-unreachable
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$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 56 -m mark --mark 3 -j REJECT --reject-with tcp-reset
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$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 56 -m mark --mark 3 -j REJECT --reject-with tcp-reset
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# autorisation des connexion légitime à DNSMASQ (avec blacklist)
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# autorisation des connexion légitime à Unbound (avec blacklist)
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# Allow connections for DNSMASQ (with blacklist)
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# Allow connections for Unbound (with blacklist)
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$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
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$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT
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$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 54 -j ACCEPT
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$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 54 -j ACCEPT
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# autorisation des connexion légitime à DNSMASQ (avec whitelist)
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# autorisation des connexion légitime à Unbound (avec whitelist)
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# Allow connections for DNSMASQ (with whitelist)
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# Allow connections for Unbound (with whitelist)
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$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT
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$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT
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$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 55 -j ACCEPT
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$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 55 -j ACCEPT
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# autorisation des connexion légitime à DNSMASQ (mode blackhole)
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# autorisation des connexion légitime à Unbound (mode blackhole)
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# Allow connections for DNSMASQ (blackhole mode)
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# Allow connections for Unbound (blackhole mode)
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$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 56 -j ACCEPT
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$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 56 -j ACCEPT
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$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 56 -j ACCEPT
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$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 56 -j ACCEPT
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# Accès direct aux services internes
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# Accès direct aux services internes
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# Internal services access
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# Internal services access
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custom_tcp_protocols_list='';custom_udp_protocols_list=''
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custom_tcp_protocols_list='';custom_udp_protocols_list=''
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while read svc_line
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while read svc_line
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do
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do
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	svc_on=`echo $svc_line|cut -b1`
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	svc_on=`echo $svc_line|cut -b1`
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	if [ $svc_on != "#" ]
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	if [ $svc_on != "#" ]
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	then
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	then
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		svc_name=`echo $svc_line|cut -d" " -f1`
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		svc_name=`echo $svc_line|cut -d" " -f1`
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		svc_port=`echo $svc_line|cut -d" " -f2`
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		svc_port=`echo $svc_line|cut -d" " -f2`
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		if [ $svc_name = "icmp" ]
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		if [ $svc_name = "icmp" ]
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		then
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		then
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			svc_icmp="on"
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			svc_icmp="on"