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 |