| 9,37 → 9,38 |
|---|
| # 1 (default) for tracability; |
| # 2 for secure admin (ssh); |
| # 3 for exterior access attempts. |
| # The French Security Agency (ANSSI) rules was applied by 'alcasar.sh' script |
| # The French Security Agency (ANSSI) rules was applied by 'this script |
| # The bootps/dhcp (67) port is always open on tun0/eth1 by coova |
| |
| conf_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 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 |
| PUBLIC_IP=`echo $public_ip_mask | cut -d"/" -f1` |
| dns1=`grep DNS1= $conf_file|cut -d"=" -f2` # first public DNS server |
| dns1=${dns1:=208.67.220.220} |
| dns2=`grep DNS2= $conf_file|cut -d"=" -f2` # second public DNS server |
| dns2=${dns2:=208.67.222.222} |
| DNSSERVERS="$dns1,$dns2" # first and second DNS IP servers addresses |
| PROTOCOLS_FILTERING=`grep PROTOCOLS_FILTERING= $conf_file|cut -d"=" -f2` # Network protocols filter (on/off) |
| PROTOCOLS_FILTERING=${PROTOCOLS_FILTERING:=off} |
| DNS_FILTERING=`grep DNS_FILTERING= $conf_file|cut -d"=" -f2` # DNS and URLs filter (on/off) |
| DNS_FILTERING=${DNS_FILTERING:=off} |
| QOS=`grep QOS= $conf_file|cut -d"=" -f2` # QOS (on/off) |
| QOS=`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=`grep SSH= $conf_file|cut -d"=" -f2` # sshd active (on/off) |
| SSH=${SSH:=off} |
| Admin_from_IP=${Admin_from_IP:="0.0.0.0/0.0.0.0"} # Une @IP fixe peut-être fournie pour restreindre l'accès en ssh depuis l'extérieur (ex: 80.22.21.53/24) ( 0.0.0.0/0.0.0.0 = de n'importe où ! ) |
| LDAP=`grep LDAP= $conf_file|cut -d"=" -f2` # ldap external server active (on/off) |
| Admin_from_IP=${Admin_from_IP:="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` # ldap external server IP address |
| 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"} |
| PRIVATE_NETWORK_MASK=$private_network/$private_prefix # Lan IP address + prefix (192.168.182.0/24) |
| PRIVATE_IP=`echo $private_ip_mask | cut -d"/" -f1` # ALCASAR LAN IP address |
| DNSSERVERS="$dns1,$dns2" # first and second DNS IP servers addresses |
| EXTIF="eth0" |
| INTIF="eth1" |
| TUNIF="tun0" # listen card for chilli daemon |
| TUNIF="tun0" # listen device for chilli daemon |
| IPTABLES="/sbin/iptables" |
| |
| # Effacement des règles existantes |
| 65,23 → 66,56 |
|---|
| $IPTABLES -t nat -P POSTROUTING ACCEPT |
| $IPTABLES -t nat -P OUTPUT ACCEPT |
| |
| # Tout passe sur loopback |
| # accept all on loopback |
| $IPTABLES -A INPUT -i lo -j ACCEPT |
| |
| ############################# |
| # INTIF rules # |
| # PREROUTING # |
| ############################# |
| # interdit l'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 |
| # 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 |
| # Remarque : Ce port n'est ouvert que lorsque le filtrage est activé |
| # Remark : this port is only open when filtering is on |
| # $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 |
| |
| # Si le filtrage est activé, redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions |
| # If DNS filter is on, redirect DNS request to udp 54 (dns+blackhole) except for exception IP addresses |
| if [ $DNS_FILTERING = on ]; then |
| # Compute exception IP |
| nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1` |
| if [ $nb_exceptions != "0" ] |
| then |
| while read ip_exception |
| do |
| $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT |
| done < /usr/local/etc/alcasar-filter-exceptions |
| fi |
| $IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j REDIRECT --to-port 54 |
| fi |
| |
| # Journalisation des requètes HTTP vers Internet (seulement les paquets SYN) - Les autres protocoles sont journalisés en FORWARD |
| # Log HTTP requests to Internet (only syn packets) - Other protocols are log in FORWARD |
| $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 vers DansGuardian (proxy transparent) |
| # Redirect HTTP requests in DansGuardian (transparent proxy) |
| $IPTABLES -A PREROUTING -t nat -i $TUNIF -s $PRIVATE_NETWORK_MASK ! -d $PRIVATE_IP -p tcp --dport http -j REDIRECT --to-port 8080 |
| |
| # 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 |
| |
| ############################# |
| # Local protection rules # |
| # INPUT # |
| ############################# |
| # On stoppe les demande de connexions non conformes (NullScan, XMAS (tous flags à 1), NEW not SYN, etc.) |
| # Drop non standard connexions (NULLscans, XMAS, "NEW not SYN", etc.) |
| # Tout passe sur loopback |
| # accept all on loopback |
| $IPTABLES -A INPUT -i 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 |
| 88,38 → 122,81 |
|---|
| $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 ne traite pas les broadcasts et multicast |
| # Drop broadcast & multicast |
| $IPTABLES -A INPUT -m addrtype --dst-type BROADCAST,MULTICAST -j DROP |
| # On rejète les trame en broadcast et en multicast sur EXTIF (pour ne pas les journaliser) |
| # Drop broadcast & multicast on EXTIF to not be logged |
| $IPTABLES -A INPUT -i $EXTIF -m addrtype --dst-type BROADCAST,MULTICAST -j DROP |
| |
| # Rejet des tentatives de création de tunnels DNS (même pour les utilisateurs authentifiés) |
| # Deny forward DNS (even for authenticated users ...) |
| $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 |
| # On autorise les retours de connexions légitimes par INPUT |
| # Conntrack on INPUT |
| $IPTABLES -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT |
| |
| # On autorise les retours de connexions légitimes par FORWARD |
| # Conntrack on forward |
| $IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT |
| # On interdit les connexions directes au port utilisé par DansGuardian (8080). Les packets concernés ont été marqués dans la table mangle (PREROUTING) |
| # Deny direct connections on DansGuardian port (8080). The concerned paquets are marked 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 |
| |
| ############################### |
| # If DNS filter is activate # |
| ############################### |
| # Redirection des flux DNS vers le port 54 (dns+blackhole) sauf pour les IP en exceptions |
| if [ $DNS_FILTERING = on ]; then |
| # Compute exception IP |
| nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1` |
| if [ $nb_exceptions != "0" ] |
| # 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 udp --dport 54 -m mark --mark 2 -j REJECT --reject-with icmp-port-unreachable |
| # autorisation des connexion légitime à DNSMASQ (avec blackhole) |
| # Allow connections for DNSMASQ (with blackhole) |
| $IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT |
| |
| # Accès direct aux services internes |
| # Internal services access |
| $IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p udp --dport domain -j ACCEPT # DNS non filtré # DNS without blackhole |
| #$IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp --icmp-type 8 -j ACCEPT # Requête ping # ping request |
| $IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p icmp --icmp-type 0 -j ACCEPT # Réponse ping # ping reply |
| $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 activate |
| if [ $SSH = on ] |
| then |
| while read ip_exception |
| do |
| $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -s $ip_exception -d $PRIVATE_IP --dport domain -j ACCEPT |
| done < /usr/local/etc/alcasar-filter-exceptions |
| fi |
| $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp -d $PRIVATE_IP --dport domain -j REDIRECT --to-port 54 |
| $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 $Admin_from_IP -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 $Admin_from_IP -d $PUBLIC_IP -p tcp --dport ssh -m state --state NEW,ESTABLISHED -j ACCEPT |
| fi |
| ##################################### |
| # If protocols filter is activate # |
| ##################################### |
| |
| # 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 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 # |
| ############################# |
| # Autorisation des retours de connexions légitimes |
| # Allow conntrack |
| $IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT |
| |
| # 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 |
| |
| # If protocols filter is activate |
| if [ $PROTOCOLS_FILTERING = on ]; then |
| # Compute exception IP (IP addresses that shouldn't be filtered) |
| nb_exceptions=`wc -l /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1` |
| 155,14 → 232,16 |
|---|
| then |
| $IPTABLES -A FORWARD -i $TUNIF -p icmp -j ACCEPT |
| else |
| $IPTABLES -A FORWARD -i $TUNIF -p tcp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_$svc_name -- ACCEPT " |
| $IPTABLES -A FORWARD -i $TUNIF -p tcp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_TCP-$svc_name -- ACCEPT " |
| $IPTABLES -A FORWARD -i $TUNIF -p tcp --dport $svc_port -m state --state NEW -j ACCEPT |
| $IPTABLES -A FORWARD -i $TUNIF -p udp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_UDP-$svc_name -- ACCEPT " |
| $IPTABLES -A FORWARD -i $TUNIF -p udp --dport $svc_port -m state --state NEW -j ACCEPT |
| fi |
| fi |
| done < /usr/local/etc/alcasar-services |
| # Rejet explicite (vers le LAN) des autres protocoles |
| # reject the others |
| $IPTABLES -A FORWARD -i $TUNIF -p tcp -j ULOG --ulog-prefix "RULE F_filter -- REJECT " |
| # 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 |
| 180,75 → 259,14 |
|---|
| $IPTABLES -A FORWARD -i $TUNIF -m state --state NEW -j ULOG --ulog-prefix "RULE F_all -- ACCEPT " |
| $IPTABLES -A FORWARD -i $TUNIF -m state --state NEW -j ACCEPT |
| |
| ################################################################################################# |
| # Direct input from local network (icmp, dns, ntp, https, http, ssh and 3990 (user disconnect) # |
| ################################################################################################# |
| $IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp --icmp-type 0 -j ACCEPT # ping reply |
| $IPTABLES -A INPUT -i $TUNIF -s $PRIVATE_NETWORK_MASK -p icmp --icmp-type 8 -j ACCEPT # ping request |
| $IPTABLES -A INPUT -i $TUNIF -d $PRIVATE_IP -p udp --dport domain -j ACCEPT # dnsmasq without forward |
| $IPTABLES -A INPUT -i $TUNIF -d $PRIVATE_IP -p udp --dport 54 -j ACCEPT # dnsmasq with blackhole |
| $IPTABLES -A INPUT -i $TUNIF -d $PRIVATE_IP -p udp --dport ntp -j ACCEPT |
| $IPTABLES -A INPUT -i $TUNIF -d $PRIVATE_IP -p tcp --dport https -j ACCEPT |
| $IPTABLES -A INPUT -i $TUNIF -d $PRIVATE_IP -p tcp --dport http -j ACCEPT |
| $IPTABLES -A INPUT -i $TUNIF -d $PRIVATE_IP -p tcp --dport 3990 -j ACCEPT |
| ############################# |
| # OUTPUT # |
| ############################# |
| # SSHD rules if activate |
| if [ $SSH = on ] |
| then |
| $IPTABLES -A INPUT -i $TUNIF -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 -d $PRIVATE_IP -p tcp --dport ssh -j ACCEPT |
| $IPTABLES -A INPUT -i $EXTIF -p tcp --dport ssh -s $Admin_from_IP -m state --state NEW --syn -j ULOG --ulog-nlgroup 2 --ulog-prefix "RULE ssh-from-WAN -- ACCEPT" |
| $IPTABLES -A INPUT -i $EXTIF -p tcp --dport ssh -s $Admin_from_IP -m state --state NEW,ESTABLISHED -j ACCEPT |
| $IPTABLES -A OUTPUT -o $EXTIF -p tcp --sport ssh -m state --state ESTABLISHED -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 |
| |
| # 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 fait l'objet d'un marquage dans la table mangle |
| # lors d'une règle de PREROUTING (voir plus bas) |
| # Deny direct connections on DansGuardian port (8080) |
| # The concerned paquets are marked by a pre-routing rule (see further) |
| $IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m mark --mark 1 -j REJECT --reject-with tcp-reset |
| # Autorisation des connexions à DansGuardian |
| # Allow connections for DansGuardian |
| $IPTABLES -A INPUT -i $TUNIF -p tcp --dport 8080 -m state --state NEW --syn -j ACCEPT |
| |
| # Journalisation des requètes HTTP (seulement des paquets SYN) |
| # Log HTTP requests (only syn) |
| $IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp ! -d $PRIVATE_IP --dport http -m state --state NEW -j ULOG --ulog-prefix "RULE F_http -- ACCEPT " |
| # On redirige les requêtes HTTP vers DansGuardian (transparent pour les utilisateurs) |
| # Redirect HTTP request in DansGuardian (transparent proxy) |
| $IPTABLES -A PREROUTING -t nat -i $TUNIF -p tcp ! -d $PRIVATE_IP --dport http -j REDIRECT --to-port 8080 |
| # Journalisation et marquage des paquets qui tentent d'accéder directement à DansGuardian |
| # pour pouvoir les supprimer en INPUT (voir plus haut) |
| # Mark the dansguardian bypass attempts |
| $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 -p tcp -d $PRIVATE_IP -m tcp --dport 8080 -j MARK --set-mark 1 |
| # On redirige les requêtes NTP vers le serveur NTP local |
| # Redirect NTP request in local NTP server |
| $IPTABLES -A PREROUTING -t nat -i $TUNIF -p udp ! -d $PRIVATE_IP --dport ntp -j REDIRECT --to-port 123 |
| |
| # 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 |
| |
| # 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" |
| |
| ############################# |
| # filtering outside 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 |
| 256,15 → 274,19 |
|---|
| # 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 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 declared |
| if [ $LDAP = on ] |
| 274,6 → 296,11 |
|---|
| # $IPTABLES -A INPUT -p tcp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT |
| # $IPTABLES -A INPUT -p udp -s $LDAP_IP -m multiports --sports ldap,ldaps -m state --state ESTABLISHED -j ACCEPT |
| fi |
| |
| |
| ############################# |
| # POSTROUTING # |
| ############################# |
| # Traduction dynamique d'adresse en sortie |
| # Dynamic NAT on EXTIF |
| $IPTABLES -A POSTROUTING -t nat -o $EXTIF -j MASQUERADE |