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root |
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#!/bin/sh
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richard |
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# by rexy (version 1.9 du 12/2009)
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root |
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# a voir la relation avec nf_nat_ftp
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# modprobe ip_conntrack_irc
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# modprobe ip_conntrack_ftp
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franck |
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################## FILTRAGE PARTICULIER ##################
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# Administration à distance par exemple :
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## Autoriser SSH depuis l'extérieur sur le port 12222 ####
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## Ne pas oublier la règle de PAT sur le modem/routeur (box ADSL) ! ainsi que l'adresse IP de votre machine distante dans /etc/hosts.allow
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# $IPTABLES -A PREROUTING -t nat -i $EXTIF -p tcp --dport 12222 -m state --state NEW -j ULOG --ulog-prefix "RULE Admin2 -- ACCEPT
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# $IPTABLES -A PREROUTING -t nat -i $EXTIF -p tcp --dport 12222 -j REDIRECT --to-port 22
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# $IPTABLES -A INPUT -i $EXTIF -p tcp --dport ssh -j ACCEPT
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##########################################################
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root |
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################# FILTRAGE APPLICATIF ####################
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## Positionnez la variable "FILTERING" du fichier "alcasar-iptables.sh" à "yes" pour activer le filtrage
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## Modifiez le fichier /usr/local/etc/alcasar-services pour l'adapter à vos besoins
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if [ $FILTERING = "yes" ]
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then
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richard |
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# si le fichier d'exception est renseigné on le traite
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richard |
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nb_exceptions=`wc -w /usr/local/etc/alcasar-filter-exceptions | cut -d" " -f1`
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richard |
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if [ $nb_exceptions != "0" ]
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then
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while read ip_exception
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do
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echo $ip_exception
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$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW -j ULOG --ulog-prefix "RULE IP-exception -- ACCEPT "
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$IPTABLES -A FORWARD -i $TUNIF -s $ip_exception -m state --state NEW,ESTABLISHED -j ACCEPT
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richard |
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done < /usr/local/etc/alcasar-filter-exceptions
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richard |
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fi
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# On autorise les protoles non commentés
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root |
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while read svc_line
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richard |
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do
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root |
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svc_on=`echo $svc_line|cut -b1`
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if [ $svc_on != "#" ]
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then
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svc_name=`echo $svc_line|cut -d" " -f1`
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svc_port=`echo $svc_line|cut -d" " -f2`
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richard |
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if [ $svc_name = "icmp" ]
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root |
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then
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richard |
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$IPTABLES -A FORWARD -i $TUNIF -p icmp -j ACCEPT
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# else if [ $svc_name = "ftp-passif" ]
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# then
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# /sbin/modprobe nf_nat_ftp
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# $IPTABLES -A FORWARD -i $TUNIF -p tcp --sport 1024: --dport 1024: -m state --state ESTABLISHED -j ULOG --ulog-prefix "RULE F_ftp-passifE -- ACCEPT "
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# $IPTABLES -A FORWARD -i $TUNIF -p tcp --sport 1024: --dport 1024: -m state --state RELATED -j ULOG --ulog-prefix "RULE F_ftp-passifR -- ACCEPT "
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# $IPTABLES -A FORWARD -i $TUNIF -p tcp --sport 1024: --dport 1024: -m state --state ESTABLISHED,RELATED -j ACCEPT
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# fi
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else
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$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport $svc_port -m state --state NEW -j ULOG --ulog-prefix "RULE F_$svc_name -- ACCEPT "
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$IPTABLES -A FORWARD -i $TUNIF -p tcp --dport $svc_port -m state --state NEW,ESTABLISHED -j ACCEPT
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root |
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fi
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fi
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done < /usr/local/etc/alcasar-services
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#tout le reste est bloqué
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$IPTABLES -A FORWARD -i $TUNIF -p tcp -j REJECT --reject-with tcp-reset
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$IPTABLES -A FORWARD -i $TUNIF -p udp -j REJECT --reject-with icmp-port-unreachable
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$IPTABLES -A FORWARD -i $TUNIF -p icmp -j REJECT
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fi
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