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richard |
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#!/bin/sh
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tom.houday |
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#
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franck |
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# $Id: alcasar-iptables-local.sh 2716 2019-03-11 21:21:45Z tom.houdayer $
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tom.houday |
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#
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# Custom rules for ALCASAR firewall
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#
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# Examples:
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# - Local MAC addresses filtering (MAC are in '/usr/local/etc/alcasar-iptables-local-mac-filtered'. Format : aa:09:23:2f:4d:ee)
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# - allow ICMP from an Internet IP address (Admin_from) to EXTIF
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# - allow SMTP from aLCASAR to an Internet server (SMTP_IP)
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# - PAT rules from Internet
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# - Deny access to protected networks from internal LAN
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# - Allow managers to access ACC from the external network
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# This script inherit of alcasar-iptables.sh variables : $INTIF, $EXTIF, $IPTABLES, etc
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# Local MAC addresses filtering (MAC are in '/usr/local/etc/alcasar-iptables-local-mac-filtered'. Format : aa:09:23:2f:4d:ee)
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richard |
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if [ -s /usr/local/etc/alcasar-iptables-local-mac-filtered ]; then
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tom.houday |
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while read mac_line
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do
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ip_on=`echo $mac_line|cut -b1`
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if [ $ip_on != "#" ]
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then
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mac_filtered=`echo $mac_line|cut -d" " -f1`
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echo "MAC filtered = $mac_filtered"
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$IPTABLES -A FORWARD -i $INTIF -m mac --mac-source $mac_filtered -j NFLOG --nflog-group 1 --nflog-prefix "$mac_filtered -- Filt_DROP"
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$IPTABLES -A FORWARD -i $INTIF -p tcp -m mac --mac-source $mac_filtered -j DROP
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$IPTABLES -A FORWARD -i $INTIF -p udp -m mac --mac-source $mac_filtered -j DROP
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$IPTABLES -A FORWARD -i $INTIF -m mac --mac-source $mac_filtered -j DROP
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fi
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done < /usr/local/etc/alcasar-iptables-local-mac-filtered
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franck |
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fi
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richard |
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tom.houday |
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# On autorise le ping (echo & request) (ICMP N°0 & 8) en provenance de l'extérieur vers ALCASAR
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# Allow ping (echo & request) (ICMP N°0 & 8) on EXTIF
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#$IPTABLES -A INPUT -i $EXTIF -s $Admin_from_IP -p icmp --icmp-type 8 -j ACCEPT
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richard |
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#$IPTABLES -A OUTPUT -o $EXTIF -d $Admin_from_IP -p icmp --icmp-type 0 -j ACCEPT
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# On autorise l'accès à un serveur MAIL (SMTP) pour l'envoie de rapports, alertes (logwatch, etc.)
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tom.houday |
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# Allow access to a mail server (SMTP)
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tom.houday |
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#SMTP_IP='192.168.111.5' # IP of mail server
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#SMTP_PORT=587 # port of mail server (25 for SMTP ; 587 for STARTTLS ; 465 for SMTPS)
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#$IPTABLES -A OUTPUT -p tcp -d $SMTP_IP --dport $SMTP_PORT -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT
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#$IPTABLES -A INPUT -p tcp -s $SMTP_IP --sport $SMTP_PORT -m conntrack --ctstate ESTABLISHED -j ACCEPT
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richard |
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franck |
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# On autorise du PAT (Port Adresse Translation) afin de pouvoir joindre des équipements du LAN depuis Internet
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tom.houday |
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# Allow PAT (Port Adresse Translation)
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rexy |
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# example for the external UDP-TCP port 11222 which is redirected to the internal IP 192.168.182.10 on port 22
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#$IPTABLES -A PREROUTING -i $EXTIF -t nat -p tcp -d $PUBLIC_IP --dport 11222 -j DNAT --to 192.168.182.10:22
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#$IPTABLES -A PREROUTING -i $EXTIF -t nat -p udp -d $PUBLIC_IP --dport 11222 -j DNAT --to 192.168.182.10:22
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#$IPTABLES -A FORWARD -p tcp -d 192.168.182.10 --dport 22 -j ACCEPT
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tom.houday |
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#$IPTABLES -A FORWARD -p udp -d 192.168.182.10 --dport 22 -j ACCEPT
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richard |
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tom.houday |
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# Deny access to protected networks from internal LAN
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#protectedNetworks='10.0.0.0/8,172.16.0.0/12,192.168.0.0/16' # (RFC 1918)
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tom.houday |
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#[ -n "$TUNIF" ] && consultationIF=$TUNIF || consultationIF=$INTIF
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#$IPTABLES -A FORWARD -i $consultationIF -d $protectedNetworks -j DROP
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#$IPTABLES -A FORWARD -o $consultationIF -s $protectedNetworks -j DROP
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tom.houday |
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# Allow managers to access ACC from the external network
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#managerIPs='192.168.111.10'
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#externalPort='34443'
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tom.houday |
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#$IPTABLES -t mangle -A PREROUTING -i $EXTIF -s $managerIPs -p tcp -d $PUBLIC_IP --dport $externalPort -j MARK --set-mark 100
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tom.houday |
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#$IPTABLES -t nat -A PREROUTING -i $EXTIF -s $managerIPs -p tcp -d $PUBLIC_IP --dport $externalPort -j DNAT --to $PRIVATE_IP:443
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tom.houday |
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#$IPTABLES -A INPUT -i $EXTIF -s $managerIPs -p tcp --dport 443 -m mark --mark 100 -j ACCEPT
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