Subversion Repositories ALCASAR

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Ignore whitespace Rev 1522 → Rev 1523

/scripts/alcasar-iptables-bypass.sh
24,6 → 24,8
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)
PROTOCOLS_FILTERING=`grep PROTOCOLS_FILTERING= $conf_file|cut -d"=" -f2` # Network protocols filter (on/off)
PROTOCOLS_FILTERING=${PROTOCOLS_FILTERING:=off}
 
 
# On vide (flush) toutes les règles existantes
73,7 → 75,7
then
$IPTABLES -A INPUT -i $INTIF -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 $INTIF -s $PRIVATE_NETWORK_MASK -d $PRIVATE_IP -p tcp --dport ssh -m state --state NEW -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 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 ACCEPT
fi
 
83,6 → 85,75
. /usr/local/etc/alcasar-iptables-local.sh
fi
 
# If protocols filter is activate
if [ $PROTOCOLS_FILTERING = on ]; then
echo "PROTOCOL FILTERING = On"
# Compute exception IP (IP addresses that shouldn't be filtered)
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 FORWARD -i $INTIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
# $IPTABLES -A FORWARD -i $INTIF -s $ip_exception -m state --state NEW -j NETFLOW
$IPTABLES -A FORWARD -i $INTIF -s $ip_exception -m state --state NEW -j ACCEPT
done < /usr/local/etc/alcasar-filter-exceptions
fi
# # 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 $INTIF -d $ip_allowed -m state --state NEW -j ULOG --ulog-prefix "RULE IP-allowed -- ACCEPT "
## $IPTABLES -A FORWARD -i $INTIF -d $ip_allowed -m state --state NEW -j NETFLOW
# $IPTABLES -A FORWARD -i $INTIF -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 $INTIF -s $PRIVATE_NETWORK_MASK -p icmp -j NETFLOW
$IPTABLES -A FORWARD -i $INTIF -s $PRIVATE_NETWORK_MASK -p icmp -j ACCEPT
else
echo "Service = $svc_port pour $svc_name"
$IPTABLES -A FORWARD -i $INTIF -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 $INTIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j NETFLOW
$IPTABLES -A FORWARD -i $INTIF -s $PRIVATE_NETWORK_MASK -p tcp --dport $svc_port -m state --state NEW -j ACCEPT
# $IPTABLES -A FORWARD -i $INTIF -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 $INTIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j NETFLOW
# $IPTABLES -A FORWARD -i $INTIF -s $PRIVATE_NETWORK_MASK -p udp --dport $svc_port -m state --state NEW -j ACCEPT
fi
fi
done < /usr/local/etc/alcasar-services
# Don't forget the HTTP port
$IPTABLES -A FORWARD -i $INTIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 80 -m state --state NEW -j ULOG --ulog-prefix "RULE F_TCP-http -- ACCEPT "
# $IPTABLES -A FORWARD -i $INTIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 80 -m state --state NEW -j NETFLOW
$IPTABLES -A FORWARD -i $INTIF -s $PRIVATE_NETWORK_MASK -p tcp --dport 80 -m state --state NEW -j ACCEPT
 
# Rejet explicite des autres protocoles
# reject the others protocols
$IPTABLES -A FORWARD -i $INTIF -j ULOG --ulog-prefix "RULE F_filter -- REJECT "
$IPTABLES -A FORWARD -i $INTIF -p tcp -j REJECT --reject-with tcp-reset
$IPTABLES -A FORWARD -i $INTIF -p udp -j REJECT --reject-with icmp-port-unreachable
$IPTABLES -A FORWARD -i $INTIF -p icmp -j REJECT
 
else
## On autorise les demandes de connexions sortantes
echo "PROTOCOL FILTERING = Off"
$IPTABLES -A FORWARD -i $INTIF -m state --state NEW -j ULOG --ulog-prefix "RULE Transfert -- ACCEPT "
$IPTABLES -A FORWARD -i $INTIF -m state --state NEW -j ACCEPT
fi
 
# on autorise les requêtes dhcp
# accept dhcp
$IPTABLES -A INPUT -i $INTIF -p udp -m udp --sport bootpc --dport bootps -j ACCEPT
96,19 → 167,11
$IPTABLES -A INPUT -i $INTIF -s $PRIVATE_NETWORK_MASK -p icmp --icmp-type 0 -j ACCEPT
$IPTABLES -A INPUT -i $INTIF -s $PRIVATE_NETWORK_MASK -p icmp --icmp-type 8 -j ACCEPT
 
# On ajoute ici les règles spécifiques de filtrage réseau (accès exterieur ...)
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 FORWARD
# Conntrack on forward
$IPTABLES -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
$IPTABLES -A FORWARD -p tcp -m state --state RELATED,ESTABLISHED -j ACCEPT
$IPTABLES -A FORWARD -p udp -j DROP
 
# On autorise les demandes de connexions sortantes
$IPTABLES -A FORWARD -i $INTIF -m state --state NEW -j ULOG --ulog-prefix "RULE Transfert -- ACCEPT "
$IPTABLES -A FORWARD -i $INTIF -m state --state NEW -j ACCEPT
 
# On autorise les flux entrant ntp et dns via INTIF
$IPTABLES -A INPUT -i $INTIF -d $PRIVATE_IP -p udp --dport domain -j ACCEPT
$IPTABLES -A INPUT -i $INTIF -d $PRIVATE_IP -p udp --dport ntp -j ACCEPT