0,0 → 1,588 |
#!/bin/bash |
# $Id$ |
# 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/INTIF by coova |
CONF_FILE="/usr/local/etc/alcasar.conf" |
EXTIF=`grep ^EXTIF= $CONF_FILE|cut -d"=" -f2` # EXTernal InterFace |
INTIF=`grep ^INTIF= $CONF_FILE|cut -d"=" -f2` # INTernal InterFace |
TUNIF="tun0" # listen device for chilli daemon |
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 address |
private_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= $CONF_FILE|cut -d"=" -f2` # ALCASAR WAN IP address |
dhcp_on_extif="off" |
if [[ "$public_ip_mask" == "dhcp" ]] |
then |
dhcp_on_extif="on" |
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" |
public_ip_mask=`ip addr show $EXTIF | grep -o -E $PTN` |
fi |
PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1` |
dns1=`grep ^DNS1= $CONF_FILE|cut -d"=" -f2` |
dns2=`grep ^DNS2= $CONF_FILE|cut -d"=" -f2` |
dns1=${dns1:=208.67.220.220} |
dns2=${dns2:=208.67.222.222} |
DNSSERVERS="$dns1,$dns2" # first and second public DNS servers |
INT_DNS_IP=`grep INT_DNS_IP $CONF_FILE|cut -d"=" -f2` # Adresse du serveur DNS interne |
INT_DNS_ACTIVE=`grep INT_DNS_ACTIVE $CONF_FILE|cut -d"=" -f2` # Activation de la redirection DNS interne |
BL_IP_CAT="/usr/local/share/iptables-bl-enabled" # categories files of the BlackListed IP |
WL_IP_CAT="/usr/local/share/iptables-wl-enabled" # categories files of the WhiteListed IP |
TMP_users_set_save="/tmp/users_set_save" # tmp file for backup users set |
TMP_set_save="/tmp/ipset_save" # tmp file for blacklist and whitelist creation |
TMP_ip_gw_save="/tmp/ipset_ip_gw_save" # tmp file for already connected ips |
SSH_LAN=`grep ^SSH_LAN= $CONF_FILE|cut -d"=" -f2` # SSH LAN port |
SSH_LAN=${SSH_LAN:=0} |
SSH_WAN=`grep ^SSH_WAN= $CONF_FILE|cut -d"=" -f2` # SSH WAN port |
SSH_WAN=${SSH_WAN:=0} |
SSH_WAN_ADMIN_FROM=`grep ^SSH_ADMIN_FROM= $CONF_FILE|cut -d"=" -f2|cut -d"/" -f2` |
SSH_WAN_ADMIN_FROM=${SSH_WAN_ADMIN_FROM:="0.0.0.0"} |
SSH_WAN_ADMIN_FROM=$([ "$SSH_WAN_ADMIN_FROM" == "0.0.0.0" ] && echo "0.0.0.0/0" || echo "$SSH_WAN_ADMIN_FROM" ) |
SSH_LAN_ADMIN_FROM=`grep ^SSH_ADMIN_FROM= $CONF_FILE|cut -d"=" -f2|cut -d"/" -f1` |
SSH_LAN_ADMIN_FROM=${SSH_LAN_ADMIN_FROM:="0.0.0.0"} |
SSH_LAN_ADMIN_FROM=$([ "$SSH_LAN_ADMIN_FROM" == "0.0.0.0" ] && echo "$PRIVATE_NETWORK_MASK" || echo "$SSH_LAN_ADMIN_FROM" ) |
IPTABLES="/sbin/iptables" |
REHABILITED_IP="/etc/e2guardian/lists/common/exceptioniplist" |
ALLOWED_SITES="/usr/local/etc/alcasar-site-direct" # WEB Sites allowed for all (no av and no filtering for av_bl users) |
MULTIWAN=`grep ^MULTIWAN $CONF_FILE|cut -d"=" -f2` |
PROXY=`grep ^PROXY= $CONF_FILE|cut -d"=" -f2` |
PROXY_IP=`grep ^PROXY_IP= $CONF_FILE|cut -d"=" -f2` |
nb_gw=`grep ^WAN $CONF_FILE|wc -l` |
interlan=`grep ^INTERLAN= $CONF_FILE|cut -d"=" -f2` |
interlan=${interlan:=off} |
|
# Allow requests to internal DNS if activated |
if [ "$INT_DNS_ACTIVE" = "on" ] |
then |
DNSSERVERS="$DNSSERVERS,$INT_DNS_IP" |
fi |
|
#ipset name list for load_balancing |
gw_list="gw0" |
if [ "$MULTIWAN" == "on" ] || [ "$MULTIWAN" == "On" ]; then |
for ((i=1 ; i<=$nb_gw ; i++)); do |
gw_list="${gw_list} gw$i" |
done |
fi |
|
# Sauvegarde des SET des utilisateurs connectés si ils existent |
# Saving SET of connected users if it exists |
ipset list not_filtered 1>/dev/null 2>&1 |
if [ $? -eq 0 ]; |
then |
ipset save not_filtered > $TMP_users_set_save |
ipset save av >> $TMP_users_set_save |
ipset save av_bl >> $TMP_users_set_save |
ipset save av_wl >> $TMP_users_set_save |
ipset save proto_0 >> $TMP_users_set_save |
ipset save proto_1 >> $TMP_users_set_save |
ipset save proto_2 >> $TMP_users_set_save |
ipset save proto_3 >> $TMP_users_set_save |
fi |
|
# Sauvegarde de la liste de toutes les IP déjà connectées pour les réintégrer dans le load balancing |
# Saving all of the already connected IP in order to put them back in the load balancing after |
if [ ! -f $TMP_ip_gw_save ];then |
# Save only if alcasar-network.sh --save has not been executed before |
for i in $gw_list;do |
ipset list $i 1>/dev/null 2>&1 |
if [ $? -eq 0 ] |
then |
# the cut -d":" -f5 deletes all the lines with a :, i.e all the lines execpt the members |
ipset list $i | cut -d":" -f5 | sed '/^[[:space:]]*$/d' >> $TMP_ip_gw_save |
fi |
done |
fi |
|
# Chargement de la sonde NetFlow (module noyau ipt_NETFLOW) |
# 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 |
$IPTABLES -t nat -P OUTPUT ACCEPT |
|
############################# |
# IPSET # |
############################# |
# destruction de tous les SET |
# destroy all SET |
ipset flush |
ipset destroy |
|
###### BL set ########### |
# Calcul de la taille / Compute the length |
bl_set_length=$(wc -l $BL_IP_CAT/* | awk '{print $1}' | tail -n 1) |
# Chargement / loading |
echo "create bl_ip_blocked hash:net family inet hashsize 1024 maxelem $bl_set_length" > $TMP_set_save |
for category in `ls -1 $BL_IP_CAT | cut -d '@' -f1` |
do |
cat $BL_IP_CAT/$category >> $TMP_set_save |
done |
ipset -! restore < $TMP_set_save |
rm -f $TMP_set_save |
# Suppression des ip réhabilitées / Removing of rehabilitated ip |
for ip in $(cat $REHABILITED_IP) |
do |
ipset -q del bl_ip_blocked $ip |
done |
|
# ipset for exception web sites (usefull for filtered users = av_bl) |
ipset create site_direct hash:net hashsize 1024 |
for site in $(cat $ALLOWED_SITES) |
do |
ipset add site_direct $site |
done |
|
###### WL set ########### |
# taille fixe, car peuplé par unbound / fixe length due to unbound dynamic loading |
wl_set_length=65536 |
# Chargement Loading |
echo "create wl_ip_allowed hash:net family inet hashsize 1024 maxelem $wl_set_length" > $TMP_set_save |
#get ip-wl files from ACC |
for category in `ls -1 $WL_IP_CAT |cut -d '@' -f1` |
do |
cat $WL_IP_CAT/$category >> $TMP_set_save |
done |
ipset -! restore < $TMP_set_save |
rm -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 SETs |
if [ -e $TMP_users_set_save ]; |
then |
ipset -! restore < $TMP_users_set_save |
rm -f $TMP_users_set_save |
else |
ipset create not_filtered hash:ip hashsize 1024 |
ipset create av hash:ip hashsize 1024 |
ipset create av_bl hash:ip hashsize 1024 |
ipset create av_wl hash:ip hashsize 1024 |
# pour les filtrages de protocole par utilisateur / For network protocols filtering by user |
ipset create proto_0 hash:ip hashsize 1024 |
ipset create proto_1 hash:ip hashsize 1024 |
ipset create proto_2 hash:ip hashsize 1024 |
ipset create proto_3 hash:ip hashsize 1024 |
fi |
|
#ipsets for load balancing |
for i in $gw_list; do |
ipset create $i hash:ip |
done |
cat $TMP_ip_gw_save | while read ip; do |
gw_min="gw0" |
weight=`grep ^PUBLIC_WEIGHT= $CONF_FILE | cut -d"=" -f2` |
already=`ipset list $gw_min | grep Number\ of\ entries: | cut -d":" -f2` |
#The *1000 is here to avoid working on floats in bash |
gw_min_value=$((1000 * $already / $weight)) |
i=1 |
for gw in $gw_list;do |
if [ "$gw" != "gw0" ]; then |
weight=`grep ^WAN$i= $CONF_FILE | awk -F'"' '{ print $2 }' | awk -F ',' '{ print $2 }'` |
already=`ipset list $gw | grep Number\ of\ entries: | cut -d":" -f2` |
value=$((1000 * $already / $weight)) |
if [ $value -lt $gw_min_value ] |
then |
gw_min_value=$value |
gw_min=$gw |
fi |
i=$(($i+1)) |
fi |
done |
ipset add $gw_min $ip |
done |
rm -f $TMP_ip_gw_save |
|
############################# |
# PREROUTING # |
############################# |
# Marquage (et journalisation) des paquets qui tentent d'accéder directement aux ports d'écoute du proxy HTTP/HTTPS (E2Guardian) pour pouvoir les rejeter en INPUT |
# Mark (and log) the direct attempts to E2guardian listen ports in order to REJECT them in INPUT rules |
# 8080 = ipset av_bl |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j NFLOG --nflog-group 1 --nflog-prefix "RULE direct-proxy -- DENY " |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8080 -j MARK --set-mark 1 |
# 8081 = ipset av_wl + av (to be redefine) |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8081 -j NFLOG --nflog-group 1 --nflog-prefix "RULE direct-proxy -- DENY " |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8081 -j MARK --set-mark 2 |
# 8443 = tranparent HTTPS for ipsets av_bl + av_wl + av (future version) |
#$IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp -d $PRIVATE_IP -m tcp --dport 8443 -j NFLOG --nflog-group 1 --nflog-prefix "RULE direct-proxy -- DENY " |
#$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp -m tcp --dport 8443 -j MARK --set-mark 6 |
|
# Marquage des paquets qui tentent d'accéder directement aux ports d'écoute DNS (UNBOUND) pour pouvoir les rejeter en INPUT |
# Mark the direct attempts to DNS ports (UNBOUND) in order to REJECT them in INPUT rules |
# 54 = ipset av_bl |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 54 -j MARK --set-mark 3 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p udp --dport 54 -j MARK --set-mark 3 |
# 55 = ipset av_wl |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 55 -j MARK --set-mark 4 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p udp --dport 55 -j MARK --set-mark 4 |
# 56 = blackall |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p tcp --dport 56 -j MARK --set-mark 5 |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -d $PRIVATE_IP -p udp --dport 56 -j MARK --set-mark 5 |
|
# redirection DNS des usagers |
# users DNS redirection |
# 54 = ipset av_bl |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_bl src -p udp --dport domain -j REDIRECT --to-port 54 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_bl src -p tcp --dport domain -j REDIRECT --to-port 54 |
# 55 = ipset av_wl |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_wl src -p udp --dport domain -j REDIRECT --to-port 55 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_wl src -p tcp --dport domain -j REDIRECT --to-port 55 |
# 53 = all other users |
$IPTABLES -A PREROUTING -t nat -i $TUNIF ! -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 53 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF ! -d $PRIVATE_IP -p tcp --dport domain -j REDIRECT --to-port 53 |
|
# Redirection HTTP des usagers 'av_bl' cherchant à joindre les IP de la blacklist vers ALCASAR (page 'accès interdit') |
# Redirect HTTP of 'av_bl' users who want blacklist IP to ALCASAR ('access denied' page) |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_bl src -m set --match-set bl_ip_blocked dst -p tcp --dport http -j REDIRECT --to-port 80 |
|
# Redirection HTTP des usagers 'av_wl' cherchant à joindre les IP qui ne sont pas dans la WL vers ALCASAR (page 'accès interdit') |
# Redirect HTTP of 'av_wl' users who want IP not in the WL to ALCASAR ('access denied' page) |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_wl src -m set ! --match-set wl_ip_allowed dst -p tcp --dport http -j REDIRECT --to-port 80 |
|
# Journalisation des usagers "av_bl + av_wl + av" (paquets SYN uniquement). Les autres protocoles sont journalisés en FORWARD par netflow. |
# accounting of "av_bl + av_wl + av" users (only syn packets). Other protocols are logged in FORWARD by netflow |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_bl src ! -d $PRIVATE_IP -p tcp --dport http -m conntrack --ctstate NEW -j NFLOG --nflog-group 1 --nflog-prefix "RULE F_http -- ACCEPT " |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_wl src ! -d $PRIVATE_IP -p tcp --dport http -m conntrack --ctstate NEW -j NFLOG --nflog-group 1 --nflog-prefix "RULE F_http -- ACCEPT " |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av src ! -d $PRIVATE_IP -p tcp --dport http -m conntrack --ctstate NEW -j NFLOG --nflog-group 1 --nflog-prefix "RULE F_http -- ACCEPT " |
|
# Redirection des requêtes HTTP des usagers "av_bl + av_wl + av" vers E2guardian |
# Redirect outbound "av_bl + av_wl +av" users HTTP requests to E2guardian |
# 8080 = ipset av_bl |
#$IPTABLES -A PREROUTING -t mangle -i $TUNIF -m set --match-set av_bl src -m set ! --match-set site_direct dst ! -d $PRIVATE_IP -p tcp --dport http -j MARK --set-mark 200 |
$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_bl src -m set ! --match-set site_direct dst ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080 |
# 8081 = ipset av_wl & av |
#$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_wl src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8081 |
#$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av src ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8081 |
|
# Redirection des requêtes HTTPS sortantes des usagers av_bl + av_wl + av vers E2Guardian (in a future version - don't forget to set E2guardian as a tranparent HTTPS proxy) |
# Redirect outbound HTTPS requests of av_bl + av_wl + av users to E2Guardian |
#$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_bl src -m set ! --match-set site_direct dst ! -d $PRIVATE_IP -p tcp --dport https -j REDIRECT --to-port 8443 |
#$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av_wl src -m set ! --match-set site_direct dst ! -d $PRIVATE_IP -p tcp --dport https -j REDIRECT --to-port 8443 |
#$IPTABLES -A PREROUTING -t nat -i $TUNIF -m set --match-set av src -m set ! --match-set site_direct dst ! -d $PRIVATE_IP -p tcp --dport https -j REDIRECT --to-port 8443 |
|
# 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 |
|
#Récupération de la marque associée à une gw pour chaque connection |
$IPTABLES -A PREROUTING -t mangle -j CONNMARK --restore-mark |
|
if [ "$PROXY" == "on" ] || [ "$PROXY" == "On" ];then |
$IPTABLES -A PREROUTING -t nat -i $TUNIF ! -d $PRIVATE_IP -p tcp -m multiport --dports http,https -j DNAT --to-destination $PROXY_IP |
fi |
|
#Marquage pour le load balancing |
if [ "$MULTIWAN" == "on" ] || [ "$MULTIWAN" == "On" ]; then |
temp_index=200 |
for i in $gw_list; do |
$IPTABLES -A PREROUTING -t mangle -i $TUNIF -m set --match-set $i src -j MARK --set-mark $temp_index |
temp_index=$(($temp_index+1)) |
done |
fi |
|
############################# |
# 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 and 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 |
$IPTABLES -A INPUT -p tcp -m tcp ! --syn -m conntrack --ctstate NEW -j DROP |
|
# Si configuré, on autorise les réponses DHCP sur EXTIF |
# If configured, DHCP responses are allowed on EXTIF |
if [[ "$dhcp_on_extif" == "on" ]] |
then |
$IPTABLES -A INPUT -i $EXTIF -p tcp --dport 68 -j ACCEPT |
$IPTABLES -A INPUT -i $EXTIF -p udp --dport 68 -j ACCEPT |
fi |
|
# 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 -m addrtype --dst-type BROADCAST,MULTICAST -j DROP |
|
# On autorise les retours de connexions légitimes par INPUT |
# Conntrack on INPUT |
$IPTABLES -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT |
|
# On interdit les connexions directes aux ports d'écoute d'E2Guardian. Les packets concernés ont été marqués et loggués dans la table mangle (PREROUTING) |
# Deny direct connections on E2Guardian listen ports. The concerned paquets have been 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 # av_bl |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8081 -m mark --mark 2 -j REJECT --reject-with tcp-reset # av_wl + av |
#$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8443 -m mark --mark 6 -j REJECT --reject-with tcp-reset # av_bl + av_wl + av (future version) |
|
# On autorise les connexions HTTP/HTTPS légitimes vers E2Guardian |
# Allow HTTP connections to E2Guardian |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8080 -m conntrack --ctstate NEW --syn -j ACCEPT |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8081 -m conntrack --ctstate NEW --syn -j ACCEPT |
#$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 8443 -m conntrack --ctstate NEW --syn -j ACCEPT # (future version) |
|
# On interdit les connexions directes aux ports d'écoupe DNS (UNBOUND). Les packets concernés ont été marqués dans la table mangle (PREROUTING) |
# Deny direct connections to DNS ports (UNBOUND). The concerned paquets are marked in mangle table (PREROUTING) |
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 54 -m mark --mark 3 -j REJECT --reject-with icmp-port-unreachable |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 54 -m mark --mark 3 -j REJECT --reject-with tcp-reset |
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 55 -m mark --mark 4 -j REJECT --reject-with icmp-port-unreachable |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 55 -m mark --mark 4 -j REJECT --reject-with tcp-reset |
$IPTABLES -A INPUT -i $TUNIF -p udp --dport 56 -m mark --mark 5 -j REJECT --reject-with icmp-port-unreachable |
$IPTABLES -A INPUT -i $TUNIF -p tcp --dport 56 -m mark --mark 5 -j REJECT --reject-with tcp-reset |
|
# On autorise les connexion DNS légitime |
# Allow DNS connections |
# ipset = av_bl |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 54 -j ACCEPT |
# ipset = av_wl |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 55 -j ACCEPT |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 55 -j ACCEPT |
# blackall |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 56 -j ACCEPT |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport 56 -j ACCEPT |
|
# On accepte l'accès 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 |
$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport domain -j ACCEPT # DNS |
$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 3990:3991 -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 |
|
# Accès au serveur SSHD si activé en LAN et WAN |
# SSHD server access in LAN and WAN if enabled |
if [ $SSH_LAN -gt 0 ] |
then |
$IPTABLES -A INPUT -i $TUNIF -s $SSH_LAN_ADMIN_FROM -d $PRIVATE_IP -p tcp --dport $SSH_LAN -m conntrack --ctstate NEW -j NFLOG --nflog-group 2 --nflog-prefix "RULE ssh-from-LAN -- ACCEPT" |
$IPTABLES -A INPUT -i $TUNIF -s $SSH_LAN_ADMIN_FROM -d $PRIVATE_IP -p tcp --dport $SSH_LAN -j ACCEPT |
fi |
if [ $SSH_WAN -gt 0 ] |
then |
$IPTABLES -A INPUT -i $EXTIF -s $SSH_WAN_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport $SSH_WAN -m conntrack --ctstate NEW --syn -j NFLOG --nflog-group 2 --nflog-prefix "RULE ssh-from-WAN -- ACCEPT" |
$IPTABLES -A INPUT -i $EXTIF -s $SSH_WAN_ADMIN_FROM -d $PUBLIC_IP -p tcp --dport $SSH_WAN -j ACCEPT |
fi |
|
# 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.sh |
fi |
|
# 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 conntrack --ctstate NEW -j NFLOG --nflog-group 3 --nflog-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 NFLOG --nflog-group 3 --nflog-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 conntrack --ctstate NEW -j NFLOG --nflog-group 3 --nflog-threshold 10 --nflog-prefix "RULE rej-ext -- DROP" |
|
############################# |
# FORWARD # |
############################# |
|
# Blocage des IPs du SET bl_ip_blocked pour le SET av_bl |
# Deny IPs of the SET bl_ip_blocked for the set av_bl |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set av_bl src -m set --match-set bl_ip_blocked dst -p icmp -j REJECT --reject-with icmp-host-prohibited |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set av_bl src -m set --match-set bl_ip_blocked dst -p udp -j REJECT --reject-with icmp-host-prohibited |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set av_bl src -m set --match-set bl_ip_blocked dst -p tcp -j REJECT --reject-with tcp-reset |
|
# Active le suivi de session |
# Allow Conntrack |
$IPTABLES -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT |
|
# Compute uamallowed IP (ie : IP address of equipments connected between ALCASAR and router like DMZ, own servers, etc.) |
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 conntrack --ctstate NEW -j NETFLOW |
$IPTABLES -A FORWARD -i $TUNIF -d $ip_allowed -m conntrack --ctstate NEW -j ACCEPT |
done < /usr/local/etc/alcasar-uamallowed |
fi |
|
# filtrage protocole par utilisateur (profile 1 : http, https) |
# protocols filtering for users (profil 1 : http, https) |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_1 src -s $PRIVATE_NETWORK_MASK -p tcp -m multiport ! --dports http,https -m conntrack --ctstate NEW -j REJECT --reject-with tcp-reset |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_1 src -s $PRIVATE_NETWORK_MASK -p udp -m multiport ! --dports http,https -m conntrack --ctstate NEW -j REJECT --reject-with icmp-port-unreachable |
|
# filtrage protocole par utilisateur (profile 2 : http https smtp pop3 pop3s imap imaps ftp sftp ssh 465+587(smtps)) |
# protocols filtering for users (profil 2 : http https smtp pop3 pop3s imap imaps ftp sftp ssh 465+587(smtps)) |
|
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_2 src -s $PRIVATE_NETWORK_MASK -p tcp -m multiport ! --dports smtp,http,https,pop3,pop3s,imap,imaps,ftp,ftp-data,sftp,ssh,465,587 -m conntrack --ctstate NEW -j REJECT --reject-with tcp-reset |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_2 src -s $PRIVATE_NETWORK_MASK -p udp -m multiport ! --dports smtp,http,https,pop3,pop3s,imap,imaps,ftp,ftp-data,sftp,ssh,465,587 -m conntrack --ctstate NEW -j REJECT --reject-with icmp-port-unreachable |
|
# filtrage protocole par utilisateur (profile 3 : personnalisable via l'ACC) |
# protocols filtering for users (profil 3 : customized with ACC) |
custom_tcp_protocols_list='';custom_udp_protocols_list='' |
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 [ $svc_name = "icmp" ] |
then |
svc_icmp="on" |
else |
if [ "$custom_tcp_protocols_list" == "" ] |
then |
custom_tcp_protocols_list=$svc_port |
else |
custom_tcp_protocols_list=`echo $custom_tcp_protocols_list","$svc_port` |
fi |
udp_svc=`grep -E "[[:space:]]$svc_port/udp" /etc/services|wc -l` |
if [ $udp_svc = "1" ] # udp service exist |
then |
if [ "$custom_udp_protocols_list" == "" ] |
then |
custom_udp_protocols_list=$svc_port |
else |
custom_udp_protocols_list=`echo $custom_udp_protocols_list","$svc_port` |
fi |
fi |
fi |
fi |
done < /usr/local/etc/alcasar-services |
if [ "$custom_tcp_protocols_list" == "" ] |
then |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_3 src -s $PRIVATE_NETWORK_MASK -j REJECT |
else |
if [ "$svc_icmp" != "on" ] |
then |
$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 |
fi |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_3 src -s $PRIVATE_NETWORK_MASK -p tcp -m multiport ! --dports $custom_tcp_protocols_list -m conntrack --ctstate NEW -j REJECT --reject-with tcp-reset |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set proto_3 src -s $PRIVATE_NETWORK_MASK -p udp -m multiport ! --dports $custom_udp_protocols_list -m conntrack --ctstate NEW -j REJECT --reject-with icmp-port-unreachable |
fi |
|
# On autorise (ou pas) les utilisateurs à accéder au réseau situé entre ALCASAR et le routeur Internet |
# Users are allowed (or not allowed) to access the network between ALCASAR and the Internet router |
if [ "$interlan" != "on" ] |
then |
$IPTABLES -A FORWARD -i $TUNIF -d $public_ip_mask -j DROP |
fi |
|
# Blocage des usagers 'av_wl' cherchant à joindre les IP qui ne sont pas dans la WL |
# Block 'av_wl' users who want IP not in the WL |
$IPTABLES -A FORWARD -i $TUNIF -m set --match-set av_wl src -m set ! --match-set wl_ip_allowed dst -j DROP |
|
# journalisation et autorisation des connections sortant du LAN |
# Allow forward connections with log |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m conntrack --ctstate NEW -j NETFLOW |
$IPTABLES -A FORWARD -i $TUNIF -s $PRIVATE_NETWORK_MASK -m conntrack --ctstate NEW -j ACCEPT |
|
############################# |
# OUTPUT # |
############################# |
# On laisse tout sortir sur la carte interne (voir les règles suivantes pour la carte externe) |
# We let everything out on INTIF (see following rules for the EXTIF) |
$IPTABLES -A OUTPUT ! -o $EXTIF -j ACCEPT |
|
# Si configuré, on autorise les requêtes DHCP sur EXTIF |
# Allow DHCP requests on EXTIF if configured |
if [[ "$dhcp_on_extif" == "on" ]] |
then |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport 67 -j ACCEPT |
$IPTABLES -A OUTPUT -o $EXTIF -p udp --dport 67 -j ACCEPT |
fi |
|
# 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 conntrack --ctstate NEW -j ACCEPT |
|
# On autorise les requêtes HTTP et HTTPS avec log Netflow (en provenance de E2guardian) |
# HTTP & HTTPS requests are allowed with netflow log (from E2guardian) |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j NETFLOW |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport http -j ACCEPT |
#$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport https -j NETFLOW # When E2guardian will be in HTTPS transparent proxy) |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport https -j ACCEPT |
|
# On autorise les requêtes RSYNC sortantes (maj BL de Toulouse) |
# RSYNC requests are allowed (update of Toulouse BL) |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport rsync -j ACCEPT |
|
# On autorise les requêtes FTP |
# FTP requests are allowed |
# modprobe nf_conntrack_ftp # no more needed with kernel > 5.15.85 |
# $IPTABLES -t raw -A OUTPUT -p tcp --dport ftp -j CT --helper ftp # no more needed with kernel > 5.15.85 |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp --dport ftp -j ACCEPT |
$IPTABLES -A OUTPUT -o $EXTIF -m conntrack --ctstate 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 |
# LDAP requests are allowed |
$IPTABLES -A OUTPUT -o $EXTIF -p tcp -m multiport --dports ldap,ldaps -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT |
$IPTABLES -A OUTPUT -o $EXTIF -p udp -m multiport --dports ldap,ldaps -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT |
|
############################# |
# POSTROUTING # |
############################# |
# Traduction dynamique d'adresse en sortie |
# Dynamic NAT on EXTIF |
$IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE |
|
#Sauvegarde de la marque associée à la connexion pour le load balancing |
$IPTABLES -A POSTROUTING -t mangle -j CONNMARK --save-mark |
|
############################# |
# FAIL2BAN # |
############################# |
# Reload Fail2Ban |
if systemctl -q is-active fail2ban; then |
/usr/bin/fail2ban-client ping &>/dev/null && /usr/bin/fail2ban-client -q reload &>/dev/null |
fi |
Property changes: |
Added: svn:eol-style |
+LF |
\ No newline at end of property |
Added: svn:executable |
+* |
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Added: svn:keywords |
+Id Author Date |
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