Rev 1392 | Rev 1459 | Go to most recent revision | Blame | Compare with Previous | Last modification | View Log
#!/bin/bash# $Id: alcasar-iptables.sh 1393 2014-06-19 08:44:51Z richard $# Script de mise en place des regles du parefeu d'Alcasar (mode normal)# This script writes the netfilter rules for ALCASAR# Rexy - 3abtux - CPN## Reminders# There are four channels for log :# 1 tracability of the consultation equipment with The 'Netflow' kernel module (iptables target = NETFLOW);# 2 protection of ALCASAR with the Ulog group 1 (default group)# 3 SSH on ALCASAR with the Ulog group 2;# 4 extern access attempts on ALCASAR with the Ulog group 3.# The bootps/dhcp (67) port is always open on tun0/eth1 by coovaconf_file="/usr/local/etc/alcasar.conf"private_ip_mask=`grep ^PRIVATE_IP= $conf_file|cut -d"=" -f2`private_ip_mask=${private_ip_mask:=192.168.182.1/24}PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1` # ALCASAR LAN IP addressprivate_network=`/bin/ipcalc -n $private_ip_mask|cut -d"=" -f2` # LAN IP address (ie.: 192.168.182.0)private_prefix=`/bin/ipcalc -p $private_ip_mask|cut -d"=" -f2` # LAN prefix (ie. 24)PRIVATE_NETWORK_MASK=$private_network/$private_prefix # Lan IP address + prefix (192.168.182.0/24)public_ip_mask=`grep ^PUBLIC_IP= $conf_file|cut -d"=" -f2` # ALCASAR WAN IP addressPUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1`dns1=`grep ^DNS1= $conf_file|cut -d"=" -f2` # first public DNS serverdns1=${dns1:=208.67.220.220}dns2=`grep ^DNS2= $conf_file|cut -d"=" -f2` # second public DNS serverdns2=${dns2:=208.67.222.222}DNSSERVERS="$dns1,$dns2" # first and second DNS IP servers addressesPROTOCOLS_FILTERING=`grep ^PROTOCOLS_FILTERING= $conf_file|cut -d"=" -f2` # Network protocols filter (on/off)PROTOCOLS_FILTERING=${PROTOCOLS_FILTERING:=off}BL_IP_CAT="/usr/local/share/iptables-bl-enabled" # categories files of the BlackListed IPBL_IP_OSSI="/usr/local/share/iptables-bl/ossi" # ossi categotyWL_IP_OSSI="/usr/local/share/ossi-ip-wl" # ip of the whitelistDNSMASQ_WL_ENABLED="/usr/local/share/dnsmasq-wl-enabled" # enabled domain names for the WhitelistTMP_users_set_save="/tmp/users_set_save" # tmp file for backup users setTMP_set_save="/tmp/ipset_save" # tmp file for blacklist and whitelist creationQOS=`grep ^QOS= $conf_file|cut -d"=" -f2` # QOS (on/off)QOS=${QOS:=off}SSH=`grep ^SSH= $conf_file|cut -d"=" -f2` # sshd active (on/off)SSH=${SSH:=off}SSH_ADMIN_FROM=`grep ^SSH_ADMIN_FROM= $conf_file|cut -d"=" -f2`SSH_ADMIN_FROM=${SSH_ADMIN_FROM:="0.0.0.0/0.0.0.0"} # WAN IP address to reduce ssh access (all ip allowed on LAN side)LDAP=`grep ^LDAP= $conf_file|cut -d"=" -f2` # LDAP external server active (on/off)LDAP=${LDAP:=off}LDAP_IP=`grep ^LDAP_IP= $conf_file|cut -d"=" -f2` # WAN IP address to reduce LDAP WAN access (all ip allowed on LAN side)LDAP_IP=${LDAP_IP:="0.0.0.0/0.0.0.0"}EXTIF="enp1s0"INTIF="enp2s0"TUNIF="tun0" # listen device for chilli daemonIPTABLES="/sbin/iptables"IP_REHABILITEES="/etc/dansguardian/lists/exceptioniplist" # Rehabilitated IPSAVE_DIR="/etc/sysconfig" # Saving path# Sauvegarde des SET des utilisateurs connectés si ils existent# Saving SET of connected users if it existsipset list no_filtering_set 1>/dev/null 2>&1if [ $? -eq 0 ];thenipset save no_filtering_set > $TMP_users_set_saveipset save havp_set >> $TMP_users_set_saveipset save havp_bl_set >> $TMP_users_set_saveipset save havp_wl_set >> $TMP_users_set_savefi# loading of NetFlow probe (ipt_NETFLOW kernel module)modprobe ipt_NETFLOW destination=127.0.0.1:2055# Effacement des règles existantes# Flush all existing rules$IPTABLES -F$IPTABLES -t nat -F$IPTABLES -t mangle -F$IPTABLES -F INPUT$IPTABLES -F FORWARD$IPTABLES -F OUTPUT# Suppression des chaines utilisateurs sur les tables filter et nat# Flush non default rules on filter and nat tables$IPTABLES -X$IPTABLES -t nat -X# Stratégies par défaut# Default policies$IPTABLES -P INPUT DROP$IPTABLES -P FORWARD DROP$IPTABLES -P OUTPUT DROP$IPTABLES -t nat -P PREROUTING ACCEPT$IPTABLES -t nat -P POSTROUTING ACCEPT$IPTABLES -t nat -P OUTPUT ACCEPT# destruction de tous les SET# destroy all SETipset destroy# Calcul de la taille du set de la blacklist# Compute the blacklist set lengthbl_set_length=$(($(wc -l $BL_IP_CAT/* | awk '{print $1}' | tail -n 1)+$(wc -l $BL_IP_OSSI | awk '{print $1}')))# Création du fichier set temporaire, remplissage, chargement et suppression# Creating the temporary set file, filling, loading and deletingecho "create blacklist_ip_blocked hash:net family inet hashsize 1024 maxelem $bl_set_length" > $TMP_set_savefor category in `ls -1 $BL_IP_CAT | cut -d '@' -f1`docat $BL_IP_CAT/$category >> $TMP_set_savedonecat $BL_IP_OSSI >> $TMP_set_saveipset -! restore < $TMP_set_saverm -f $TMP_set_save# Extraction des ip réhabilitées# Extracting rehabilitated ipfor ip in $(cat $IP_REHABILITEES)doipset del blacklist_ip_blocked $ipdone# Calcul de la taille du set de la whitelist# Compute the whitelist set lengthwl_set_length=$(($(wc -l $DNSMASQ_WL_ENABLED/* | awk '{print $1}' | tail -n 1)*3))# Création du fichier set temporaire, remplissage, chargement et suppression# Creating the temporary set file, filling, loading and deletingecho "create whitelist_ip_allowed hash:net family inet hashsize 1024 maxelem $wl_set_length" > $TMP_set_savecat $WL_IP_OSSI >> $TMP_set_saveipset -! restore < $TMP_set_saverm -f $TMP_set_save# Restoration des SET des utilisateurs connectés si ils existent sinon création des SET# Restoring the connected users SETs if available, otherwise creating SETsif [ -e $TMP_users_set_save ];thenipset -! restore < $TMP_users_set_saverm -f $TMP_users_set_saveelseipset create no_filtering_set hash:net hashsize 1024ipset create havp_set hash:net hashsize 1024ipset create havp_bl_set hash:net hashsize 1024ipset create havp_wl_set hash:net hashsize 1024fi############################## PREROUTING ############################### Marquage (et journalisation) des paquets qui tentent d'accéder directement à DansGuardian pour pouvoir les rejeter en INPUT# mark (and log) the dansguardian bypass attempts in order to DROP them in INPUT rules$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j ULOG --ulog-prefix "RULE direct-proxy -- DENY "$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 54 pour pouvoir les rejeter en INPUT# Mark (and log) the udp 54 direct attempts to REJECT them in INPUT rules# $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP -m udp --dport 54 -j ULOG --ulog-prefix "RULE DNS-proxy -- DENY "$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 2# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port udp 55 pour pouvoir les rejeter en INPUT# Mark (and log) the udp 55 direct attempts to REJECT them in INPUT rules$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 55 -j MARK --set-mark 3# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8090 pour pouvoir les rejeter en INPUT# Mark (and log) the 8090 direct attempts to REJECT them in INPUT rules$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8090 -j MARK --set-mark 4# Marquage (et journalisation) des paquets qui tentent d'accéder directement au port 8091 pour pouvoir les rejeter en INPUT# Mark (and log) the 8091 direct attempts to REJECT them in INPUT rules$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8091 -j MARK --set-mark 5# havp_bl_set --> redirection vers le port 54# havp_bl_set --> redirect to port 54$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl_set src -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54# havp_wl_set --> redirection vers le port 55# havp_wl_set --> redirect to port 55$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl_set src -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 55# Redirection des requêtes HTTP des IP de la blacklist vers ALCASAR (page 'accès interdit') pour le set havp_bl_set# Redirect outbound HTTP requests from blacklist IP to ALCASAR ('access denied' page) for the set havp_bl_set$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl_set src -m set --match-set blacklist_ip_blocked dst -p tcp --dport http -j REDIRECT --to-port 80# Redirection des requêtes HTTP des IP qui ne sont pas dans la whitelist vers ALCASAR (page 'accès interdit') pour le set havp_wl_set# Redirect outbound HTTP requests from IP which are not in the whitelist to ALCASAR ('access denied' page) for the set havp_wl_set$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl_set src -m set ! --match-set whitelist_ip_allowed dst -p tcp --dport http -j REDIRECT --to-port 80# Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD par netflow## Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD by netflow$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -m state --state NEW -j ULOG --ulog-prefix "RULE F_http -- ACCEPT "# Redirection des requêtes HTTP sortantes vers HAVP (8091) pour le set havp_set# Redirect outbound HTTP requests to HAVP (8091) for the set havp_set$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_set src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8091# Redirection des requêtes HTTP sortantes vers DansGuardian (proxy transparent) pour le set havp_bl_set# Redirect outbound HTTP requests to DansGuardian (transparent proxy) for the set havp_bl_set$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_bl_set src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080# Redirection des requêtes HTTP sortantes vers HAVP pour le set havp_wl_set# Redirect outbound HTTP requests to HAVP for the set havp_wl_set$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set havp_wl_set src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8091# Redirection des requêtes NTP vers le serveur NTP local# Redirect NTP request in local NTP server$IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p udp --dport ntp -j REDIRECT --to-port 123############################## INPUT ############################### Tout passe sur loopback# accept all on loopback$IPTABLES -A INPUT -i lo -j ACCEPT$IPTABLES -A OUTPUT -o lo -j ACCEPT# Rejet des demandes de connexions non conformes (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)# Drop non standard connexions (FIN-URG-PUSH, XMAS, NullScan, SYN-RST et NEW not SYN)$IPTABLES -A INPUT -p tcp --tcp-flags FIN,URG,PSH FIN,URG,PSH -j DROP$IPTABLES -A INPUT -p tcp --tcp-flags ALL ALL -j DROP$IPTABLES -A INPUT -p tcp --tcp-flags ALL NONE -j DROP$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m state --state NEW -j DROP# On rejette les trame en broadcast et en multicast sur EXTIF (évite leur journalisation)# Drop broadcast & multicast on EXTIF to avoid log$IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP# On autorise les retours de connexions légitimes par INPUT# Conntrack on INPUT$IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT# On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING)# Deny direct connections on DansGuardian port (8080). The concerned paquets are marked and logged in mangle table (PREROUTING)$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset# Autorisation des connexions légitimes à DansGuardian# Allow connections for DansGuardian$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT# On interdit les connexions directes au port UDP 54. Les packets concernés ont été marqués dans la table mangle (PREROUTING)# Deny direct connections on UDP 54. The concerned paquets are marked in mangle table (PREROUTING)$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable# On interdit les connexions directes au port UDP 55. Les packets concernés ont été marqués dans la table mangle (PREROUTING)# Deny direct connections on UDP 55. The concerned paquets are marked in mangle table (PREROUTING)$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 55 -m mark --mark 3 -j REJECT --reject-with icmp-port-unreachable# On interdit les connexions directes au port 8090. Les packets concernés ont été marqués dans la table mangle (PREROUTING)# Deny direct connections on 8090. The concerned paquets are marked in mangle table (PREROUTING)$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8090 -m mark --mark 4 -j REJECT --reject-with tcp-reset# On interdit les connexions directes au port 8091. Les packets concernés ont été marqués dans la table mangle (PREROUTING)# Deny direct connections on 8091. The concerned paquets are marked in mangle table (PREROUTING)$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8091 -m mark --mark 5 -j REJECT --reject-with tcp-reset# Autorisation des connexions légitimes à HAVP# Allow connections for HAVP$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8090 -m state --state NEW --syn -j ACCEPT# Autorisation des connexions légitimes à HAVP# Allow connections for HAVP$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8091 -m state --state NEW --syn -j ACCEPT# autorisation des connexion légitime à DNSMASQ (avec blacklist)# Allow connections for DNSMASQ (with blacklist)$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT# autorisation des connexion légitime à DNSMASQ (avec whitelist)# Allow connections for DNSMASQ (with whitelist)$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT# Accès direct aux services internes# Internal services access$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT # DNS non filtré # DNS without blacklist$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 8 -j ACCEPT # Réponse ping # ping responce$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT # Requête ping # ping request$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport https -j ACCEPT # Pages d'authentification et MCC # authentication pages and MCC$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport http -j ACCEPT # Page d'avertissement filtrage # Filtering warning pages$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 3990 -j ACCEPT # Requêtes de deconnexion usagers # Users logout requests$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# SSHD rules if activateif [ $SSH = on ]then$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -m state --state NEW -j ULOG --ulog-nlgroup 2 --ulog-prefix "RULE ssh-from-LAN -- ACCEPT"$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW --syn -j ULOG --ulog-nlgroup 2 --ulog-prefix "RULE ssh-from-WAN -- ACCEPT"$IPTABLES -A INPUT -i $EXTIF -s $SSH_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW -j ACCEPTfi# Insertion de règles locales# Here, we add local rules (i.e. VPN from Internet)if [ -f /usr/local/etc/alcasar-iptables-local.sh ]; then. /usr/local/etc/alcasar-iptables-local.shfi# Journalisation et rejet des connexions (autres que celles autorisées) effectuées depuis le LAN# Deny and log on INPUT from the LAN$IPTABLES -A INPUT -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE rej-int -- REJECT "$IPTABLES -A INPUT -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset$IPTABLES -A INPUT -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable# Interdiction d'accès à INTIF (n'est utile que lorsque chilli est arrêté).# Reject INTIF access (only when chilli is down)$IPTABLES -A INPUT -i $INTIF -j ULOG --ulog-prefix "RULE Protect1 -- REJECT "$IPTABLES -A INPUT -i $INTIF -j REJECT# Journalisation et rejet des connexions initiées depuis le réseau extérieur (test des effets du paramètre --limit en cours)# On EXTIF, the access attempts are log in channel 2 (we should test --limit option to avoid deny of service)$IPTABLES -A INPUT -i $EXTIF -m state --state NEW -j ULOG --ulog-nlgroup 3 --ulog-qthreshold 10 --ulog-prefix "RULE rej-ext -- DROP"############################## FORWARD ############################### Blocage des IPs du SET blacklist_ip_blocked pour le SET havp_bl_set# Deny IPs of the SET blacklist_ip_blocked for the set havp_bl_set$IPTABLES -A FORWARD -i $TUNIF -m set --match-set havp_bl_set src -m set --match-set blacklist_ip_blocked dst -p icmp -j REJECT --reject-with icmp-port-unreachable$IPTABLES -A FORWARD -i $TUNIF -m set --match-set havp_bl_set src -m set --match-set blacklist_ip_blocked dst -p udp -j REJECT --reject-with icmp-port-unreachable$IPTABLES -A FORWARD -i $TUNIF -m set --match-set havp_bl_set src -m set --match-set blacklist_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset# Rejet des requêtes DNS vers Internet# Deny forward DNS$IPTABLES -A FORWARD -i $TUNIF -p udp --dport domain -j REJECT --reject-with icmp-port-unreachable$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport domain -j REJECT --reject-with tcp-reset# Autorisation des retours de connexions légitimes$IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT# If protocols filter is activate#if [ $PROTOCOLS_FILTERING = on ]; then# # Compute uamallowed IP (IP address of equipments connected between ALCASAR and Internet (DMZ, own servers, ...)# nb_uamallowed=`wc -l /usr/local/etc/alcasar-uamallowed | cut -d" " -f1`# if [ $nb_uamallowed != "0" ]# then# while read ip_allowed_line# do# ip_allowed=`echo $ip_allowed_line|cut -d"\"" -f2`# $IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "# $IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j NETFLOW# $IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m state --state NEW -j ACCEPT# done < /usr/local/etc/alcasar-uamallowed# fi# # Autorisation des protocoles non commentés# # Allow non comment protocols# while read svc_line# do# svc_on=`echo $svc_line|cut -b1`# if [ $svc_on != "#" ]# then# svc_name=`echo $svc_line|cut -d" " -f1`# svc_port=`echo $svc_line|cut -d" " -f2`# if [ $svc_name = "icmp" ]# then# $IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW# $IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT# else## $IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_TCP-$svc_name -- ACCEPT "# $IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW# $IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT# $IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_UDP-$svc_name -- ACCEPT "# $IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW# $IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT# fi# fi# done < /usr/local/etc/alcasar-services# # Rejet explicite des autres protocoles# # reject the others protocols# $IPTABLES -A FORWARD -i $TUNIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "# $IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset# $IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable# $IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT#fi# If QOS is activate #if [ $QOS = on ] && [ -e /usr/local/etc/alcasar-iptables-qos.sh ]; then. /usr/local/etc/alcasar-iptables-qos.shfi# Autorisation des connections sortant du LAN# Allow forward connections with log#$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT "$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j NETFLOW$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m state --state NEW -j ACCEPT############################## OUTPUT ############################### On laisse tout sortir sur toutes les cartes sauf celle qui est connectée sur l'extérieur# Everything is allowed but traffic through outside network interface$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT# On autorise les requêtes DNS vers les serveurs DNS identifiés# Allow DNS requests to identified DNS servers$IPTABLES -A OUTPUT -o $EXTIF -d $DNSSERVERS -p udp --dport domain -m state --state NEW -j ACCEPT# On autorise les requêtes HTTP sortantes# HTTP requests are allowed$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT# On autorise les requêtes FTP# FTP requests are allowedmodprobe ip_conntrack_ftp$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT$IPTABLES -A OUTPUT -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT# On autorise les requêtes NTP# NTP requests are allowed$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport ntp -j ACCEPT# On autorise les requêtes ICMP (ping)# ICMP (ping) requests are allowed$IPTABLES -A OUTPUT -o $EXTIF -p icmp --icmp-type 8 -j ACCEPT# On autorise les requêtes LDAP si un serveur externe est configué# LDAP requests are allowed if an external server is declaredif [ $LDAP = on ]then$IPTABLES -A OUTPUT -p tcp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPT$IPTABLES -A OUTPUT -p udp -d $LDAP_IP -m multiport --dports ldap,ldaps -m state --state NEW,ESTABLISHED -j ACCEPTfi############################## POSTROUTING ############################### Traduction dynamique d'adresse en sortie# Dynamic NAT on EXTIF$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE# End of script