Subversion Repositories ALCASAR

#!/bin/sh
#
# $Id: alcasar-iptables-local.sh 2538 2018-04-30 04:26:41Z tom.houdayer $
#
# Custom rules for ALCASAR firewall
#
# Examples:
#       - Local MAC addresses filtering (MAC are in '/usr/local/etc/alcasar-iptables-local-mac-filtered'. Format : aa:09:23:2f:4d:ee)
#       - allow ICMP from an Internet IP address (Admin_from) to EXTIF
#       - allow SMTP from aLCASAR to an Internet server (SMTP_IP)
#       - PAT rules from Internet
#       - Deny access to protected networks from internal LAN
#       - Allow managers to access ACC from the external network
# This script inherit of alcasar-iptables.sh variables : $INTIF, $EXTIF, $IPTABLES, etc

# Local MAC addresses filtering (MAC are in '/usr/local/etc/alcasar-iptables-local-mac-filtered'. Format : aa:09:23:2f:4d:ee)
if [ -s /usr/local/etc/alcasar-iptables-local-mac-filtered ]; then
          while read mac_line
          do
                  ip_on=`echo $mac_line|cut -b1`
                  if [ $ip_on != "#" ]
                  then
                          mac_filtered=`echo $mac_line|cut -d" " -f1`
                          echo "MAC filtered = $mac_filtered"
                          $IPTABLES -A FORWARD -i $INTIF        -m mac --mac-source $mac_filtered -j NFLOG --nflog-group 1 --nflog-prefix "$mac_filtered -- Filt_DROP"
                          $IPTABLES -A FORWARD -i $INTIF -p tcp -m mac --mac-source $mac_filtered -j DROP
                          $IPTABLES -A FORWARD -i $INTIF -p udp -m mac --mac-source $mac_filtered -j DROP
                          $IPTABLES -A FORWARD -i $INTIF        -m mac --mac-source $mac_filtered -j DROP
                  fi
          done < /usr/local/etc/alcasar-iptables-local-mac-filtered
fi

# On autorise le ping (echo & request) (ICMP N°0 & 8) en provenance de l'extérieur vers ALCASAR
# Allow ping (echo & request) (ICMP N°0 & 8) on EXTIF
#$IPTABLES -A INPUT  -i $EXTIF -s $Admin_from_IP -p icmp --icmp-type 8 -j ACCEPT
#$IPTABLES -A OUTPUT -o $EXTIF -d $Admin_from_IP -p icmp --icmp-type 0 -j ACCEPT

# On autorise l'accès à un serveur MAIL (SMTP) pour l'envoie de rapports, alertes (logwatch, etc.)
# Allow access to a mail server (SMTP)
#SMTP_IP=0.0.0.0                        # renseigner l'@IP du serveur SMTP
#$IPTABLES -A OUTPUT -p tcp -d $SMTP_IP --dport smtp -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT
#$IPTABLES -A INPUT  -p tcp -s $SMTP_IP --sport smtp -m conntrack --ctstate ESTABLISHED     -j ACCEPT

# On autorise du PAT (Port Adresse Translation) afin de pouvoir joindre des équipements du LAN depuis Internet
# Allow PAT (Port Adresse Translation)
#m_ports=5000,5001
#to_ip=192.168.182.3
#$IPTABLES -A PREROUTING -i $EXTIF -t nat -p tcp -d $PUBLIC_IP -m multiport --dports $m_ports -j DNAT --to $to_ip
#$IPTABLES -A FORWARD -i $EXTIF -p tcp -d $to_ip -m multiport --dports $m_ports -j ACCEPT
#$IPTABLES -A FORWARD -o $EXTIF -p tcp -s $to_ip -m multiport --sports $m_ports -j ACCEPT

# Deny access to protected networks from internal LAN
#protectedNetworks='10.0.0.0/8,172.16.0.0/12,192.168.0.0/16' # (RFC 1918)
#$IPTABLES -A FORWARD -i $TUNIF -d $protectedNetworks -j DROP

# Allow managers to access ACC from the external network
#managerIPs='192.168.111.10'
#externalPort='34443'
#$IPTABLES -t mangle -A PREROUTING -i $EXTIF -s $managerIPs -p tcp -d $PUBLIC_IP --dport 443 -j MARK --set-mark 1
#$IPTABLES -t nat    -A PREROUTING -i $EXTIF -s $managerIPs -p tcp -d $PUBLIC_IP --dport $externalPort -j DNAT --to $PRIVATE_IP:443
#$IPTABLES           -A INPUT      -i $EXTIF -s $managerIPs -p tcp --dport 443 -m mark --mark 1 -j DROP
#$IPTABLES           -A INPUT      -i $EXTIF -s $managerIPs -p tcp --dport 443 -j ACCEPT