-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 First thanks to all to try solve my problem. To simplify it, i've cutpasted the full firewall configuration: #!/bin/sh # # 1.1 Internet Configuration. # INET_IP="151.8.47.82" SIENA_IP="151.8.47.83" DOMINI_IP="151.8.47.84" LEONARDO_IP="151.8.47.85" PROXYSAT_IP="151.8.47.86" ELEKTRA_IP="151.8.47.87" EXCHANGE_IP="151.8.47.90" INET_IFACE="eth0" INET2_IP="81.113.95.245" SIENA2_IP="81.113.95.250" DOMINI2_IP="81.113.95.251" INET2_IFACE="eth1" # # 1.2 Local Area Network configuration. # # your LAN's IP range and localhost IP. /24 means to only use the first 24 # bits of the 32 bit IP address. the same as netmask 255.255.255.0 # LAN_IP="10.0.0.1" LAN2_IP="172.16.0.1" LAN_IFACE="eth3" # # 1.3 DMZ Configuration. # DMZ_IP="192.168.0.1" DMZ_SIENA_IP="192.168.0.2" DMZ_DOMINI_IP="192.168.0.3" DMZ_ELEKTRA_IP="192.168.0.7" DMZ_EXCHANGE_IP="192.168.0.10" DMZ_PROXYSAT_IP="192.168.0.11" DMZ_LEONARDO_IP="192.168.0.12" DMZ_IFACE="eth2" # # 1.4 Localhost Configuration. # LO_IFACE="lo" LO_IP="127.0.0.1" # # 1.5 IPTables Configuration. # IPTABLES="/usr/sbin/iptables" echo "1" > /proc/sys/net/ipv4/ip_forward echo "1" > /proc/sys/net/ipv4/conf/all/rp_filter echo "1" > /proc/sys/net/ipv4/conf/all/accept_source_route $IPTABLES -F INPUT $IPTABLES -F OUTPUT $IPTABLES -F FORWARD $IPTABLES -P INPUT DROP $IPTABLES -P OUTPUT DROP $IPTABLES -P FORWARD DROP $IPTABLES -N bad_tcp_packets $IPTABLES -N allowed $IPTABLES -N icmp_packets $IPTABLES -A bad_tcp_packets -p tcp --tcp-flags SYN,ACK SYN,ACK -m state - --state NEW -j REJECT --reject-with tcp-reset $IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j LOG - --log-prefix "New not syn:" $IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j DROP $IPTABLES -A allowed -p TCP --syn -j ACCEPT $IPTABLES -A allowed -p TCP -m state --state ESTABLISHED,RELATED -j ACCEPT $IPTABLES -A allowed -p TCP -j DROP # IPSEC $IPTABLES -A INPUT -p udp --dport 500 -j ACCEPT $IPTABLES -A INPUT -p 50 -j ACCEPT $IPTABLES -A INPUT -p 51 -j ACCEPT # # ICMP rules # # Changed rules totally $IPTABLES -A icmp_packets -p ICMP -s 0/0 --icmp-type 8 -j ACCEPT $IPTABLES -A icmp_packets -p ICMP -s 0/0 --icmp-type 11 -j ACCEPT # # 4.1.4 INPUT chain # # # Bad TCP packets we don't want # $IPTABLES -A INPUT -p tcp -j bad_tcp_packets # # Packets from the Internet to this box # $IPTABLES -A INPUT -p ICMP -i $INET_IFACE -j icmp_packets $IPTABLES -A INPUT -p ICMP -i $INET2_IFACE -j icmp_packets # # Packets from LAN, DMZ or LOCALHOST # # # From DMZ Interface to DMZ firewall IP # $IPTABLES -A INPUT -p ALL -i $DMZ_IFACE -d $DMZ_IP -j ACCEPT # # From LAN Interface to LAN firewall IP # $IPTABLES -A INPUT -p ALL -i $LAN_IFACE -d $LAN_IP -j ACCEPT $IPTABLES -A INPUT -p ALL -i $LAN_IFACE -d $LAN2_IP -j ACCEPT # # From Localhost interface to Localhost IP's # $IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $LO_IP -j ACCEPT $IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $LAN_IP -j ACCEPT $IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $LAN2_IP -j ACCEPT $IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $INET_IP -j ACCEPT $IPTABLES -A INPUT -p ALL -i $LO_IFACE -s $INET2_IP -j ACCEPT # # Special rule for DHCP requests from LAN, which are not caught properly # otherwise. # $IPTABLES -A INPUT -p UDP -i $LAN_IFACE --dport 67 --sport 68 -j ACCEPT # # All established and related packets incoming from the internet to the # firewall # $IPTABLES -A INPUT -p ALL -d $INET_IP -m state --state ESTABLISHED,RELATED -j ACCEPT $IPTABLES -A INPUT -p ALL -d $INET2_IP -m state --state ESTABLISHED,RELATED -j ACCEPT $IPTABLES -A INPUT -p TCP -d $INET_IP -m multiport --dports 22 -j ACCEPT # # In Microsoft Networks you will be swamped by broadcasts. These lines # will prevent them from showing up in the logs. # $IPTABLES -A INPUT -m limit --limit 3/minute --limit-burst 3 -j LOG \ - --log-level DEBUG --log-prefix "IPT INPUT packet died: " $IPTABLES -A FORWARD -p tcp -j bad_tcp_packets $IPTABLES -A FORWARD -i $DMZ_IFACE -o $INET_IFACE -j ACCEPT $IPTABLES -A FORWARD -i $INET_IFACE -o $DMZ_IFACE -m state --state ESTABLISHED,RELATED -j ACCEPT $IPTABLES -A FORWARD -i $LAN_IFACE -o $DMZ_IFACE -j ACCEPT $IPTABLES -A FORWARD -i $DMZ_IFACE -o $LAN_IFACE -m state --state ESTABLISHED,RELATED -j ACCEPT $IPTABLES -A FORWARD -i $DMZ_IFACE -o $INET2_IFACE -j ACCEPT $IPTABLES -A FORWARD -i $INET2_IFACE -o $DMZ_IFACE -m state --state ESTABLISHED,RELATED -j ACCEPT $IPTABLES -A FORWARD -i $LAN_IFACE -o $DMZ_IFACE -j ACCEPT $IPTABLES -A FORWARD -i $DMZ_IFACE -o $LAN_IFACE -m state --state ESTABLISHED,RELATED -j ACCEPT # # LAN section # $IPTABLES -A FORWARD -i $LAN_IFACE -j ACCEPT $IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT # # Log weird packets that don't match the above. # $IPTABLES -A FORWARD -m limit --limit 3/minute --limit-burst 3 -j LOG - --log-level DEBUG --log-prefix "IPT FORWARD packet died: " # # 4.1.6 OUTPUT chain # # # Bad TCP packets we don't want. # $IPTABLES -A OUTPUT -p tcp -j bad_tcp_packets # # Special OUTPUT rules to decide which IP's to allow. # $IPTABLES -A OUTPUT -p ALL -s $LO_IP -j ACCEPT $IPTABLES -A OUTPUT -p ALL -s $LAN_IP -j ACCEPT $IPTABLES -A OUTPUT -p ALL -s $LAN2_IP -j ACCEPT $IPTABLES -A OUTPUT -p ALL -s $INET_IP -j ACCEPT $IPTABLES -A OUTPUT -p ALL -s $INET2_IP -j ACCEPT # # Log weird packets that don't match the above. # $IPTABLES -A OUTPUT -m limit --limit 3/minute --limit-burst 3 -j LOG - --log-level DEBUG --log-prefix "IPT OUTPUT packet died: " ###### # 4.2 nat table # $IPTABLES -t nat -F ########################### PORT FORWARDING DA ESTERNO AD INTRANET $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $LAN_IFACE -d 10.0.0.50 --dport 1494 -j allowed # CITRIX ICA $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d 151.8.47.82 --dport 1494 -j DNAT --to-destination 10.0.0.50 ########################### SERVIZI DOMINI.TDSIENA.IT $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -m multiport --dports 25,110 -j allowed # SOLO SIENA $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP -m multiport --dports 20,21,53,80 -j allowed $IPTABLES -A FORWARD -p UDP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP -m multiport --dports 53 -j ACCEPT $IPTABLES -A FORWARD -p TCP -i $INET2_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -m multiport --dports 25,110 -j allowed # SOLO SIENA $IPTABLES -A FORWARD -p TCP -i $INET2_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP -m multiport --dports 20,21,53,80 -j allowed $IPTABLES -A FORWARD -p UDP -i $INET2_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP -m multiport --dports 53 -j ACCEPT $IPTABLES -A FORWARD -p TCP -i $LAN_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -m multiport --dports 25,110 -j allowed # SOLO SIENA $IPTABLES -A FORWARD -p TCP -i $LAN_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP -m multiport --dports 20,21,53,80 -j allowed $IPTABLES -A FORWARD -p UDP -i $LAN_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP -m multiport --dports 53 -j ACCEPT $IPTABLES -A FORWARD -p ICMP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP -j icmp_packets $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $DOMINI_IP -m multiport --dports 20,21,80 -j DNAT --to-destination $DMZ_DOMINI_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $DOMINI_IP -m multiport --dport 25,110 -j DNAT --to-destination $DMZ_SIENA_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $INET2_IFACE -d $DOMINI_IP -m multiport --dports 20,21,80 -j DNAT --to-destination $DMZ_DOMINI_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $INET2_IFACE -d $DOMINI_IP -m multiport --dport 25,110 -j DNAT --to-destination $DMZ_SIENA_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -d $DOMINI_IP -m multiport - --dports 20,21,80 -j DNAT --to-destination $DMZ_DOMINI_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -d $DOMINI_IP -m multiport - --dport 25,110 -j DNAT --to-destination $DMZ_SIENA_IP ########################### SERVIZI SIENA.TDSIENA.IT $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -m multiport --dports 25,53,110 -j allowed $IPTABLES -A FORWARD -p UDP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -m multiport --dports 53 -j allowed $IPTABLES -A FORWARD -p ICMP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -j icmp_packets $IPTABLES -A FORWARD -p TCP -i $INET2_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -m multiport --dports 25,53,110 -j allowed $IPTABLES -A FORWARD -p UDP -i $INET2_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -m multiport --dports 53 -j allowed $IPTABLES -A FORWARD -p ICMP -i $INET2_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -j icmp_packets $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $SIENA_IP -m multiport - --dports 25,53,80,110 -j DNAT --to-destination $DMZ_SIENA_IP $IPTABLES -t nat -A PREROUTING -p UDP -i $INET_IFACE -d $SIENA_IP -m multiport - --dports 53 -j DNAT --to-destination $DMZ_SIENA_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $INET2_IFACE -d $SIENA_IP -m multiport --dports 25,53,80,110 -j DNAT --to-destination $DMZ_SIENA_IP $IPTABLES -t nat -A PREROUTING -p UDP -i $INET2_IFACE -d $SIENA_IP -m multiport --dports 53 -j DNAT --to-destination $DMZ_SIENA_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -d $SIENA_IP -m multiport - --dports 25,53,80,110 -j DNAT --to-destination $DMZ_SIENA_IP $IPTABLES -t nat -A PREROUTING -p UDP -i $LAN_IFACE -d $SIENA_IP -m multiport - --dports 53 -j DNAT --to-destination $DMZ_SIENA_IP ########################### SERVIZI EXCHANGE.TDSIENA.IT $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_EXCHANGE_IP - -m multiport --dports 80,110,143,389,443,691,3268 -j allowed $IPTABLES -A FORWARD -p UDP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_EXCHANGE_IP - -m multiport --dports 135,389 -j allowed $IPTABLES -A FORWARD -p ICMP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_EXCHANGE_IP - -j icmp_packets $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $EXCHANGE_IP -m multiport --dports 80,110,135,143,389,443,691,3268 -j DNAT --to-destination $DMZ_EXCHANGE_IP $IPTABLES -t nat -A PREROUTING -p UDP -i $INET_IFACE -d $EXCHANGE_IP -m multiport --dports 135,389 -j DNAT --to-destination $DMZ_EXCHANGE_IP ########################### SERVIZI PROXYSAT.TDSIENA.IT $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_PROXYSAT_IP - --dport 80 -j allowed $IPTABLES -A FORWARD -p ICMP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_PROXYSAT_IP - -j icmp_packets $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $PROXYSAT_IP --dport 80 -j DNAT --to-destination $DMZ_PROXYSAT_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -d $PROXYSAT_IP --dport 80 - -j DNAT --to-destination $DMZ_PROXYSAT_IP ########################### SERVIZI LEONARDO $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_LEONARDO_IP - -m multiport --dports 80,3389 -j allowed $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_LEONARDO_IP - --dport 4000:10000 -j allowed $IPTABLES -A FORWARD -p UDP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_LEONARDO_IP - --dport 4000:10000 -j allowed $IPTABLES -A FORWARD -p ICMP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_LEONARDO_IP - -j icmp_packets $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $LEONARDO_IP -m multiport --dports 80,3389 -j DNAT --to-destination $DMZ_LEONARDO_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $LEONARDO_IP --dport 4000:10000 -j DNAT --to-destination $DMZ_LEONARDO_IP $IPTABLES -t nat -A PREROUTING -p UDP -i $INET_IFACE -d $LEONARDO_IP --dport 4000:10000 -j DNAT --to-destination $DMZ_LEONARDO_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -d $LEONARDO_IP -m multiport --dports 80,3389 -j DNAT --to-destination $DMZ_LEONARDO_IP ########################### SERVIZI ELEKTRA $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_ELEKTRA_IP -m multiport --dports 20,21,22,25,80,110 -j allowed $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $ELEKTRA_IP -m multiport --dports 20,21,22,25,80,110 -j DNAT --to-destination $DMZ_ELEKTRA_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -d $ELEKTRA_IP -m multiport --dports 20,21,22,25,80,110 -j DNAT --to-destination $DMZ_ELEKTRA_IP $IPTABLES -A FORWARD -p ICMP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_ELEKTRA_IP - -j icmp_packets # Squid Trasparent Proxy $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -s 10.0.0.0/24 --dport 80 - -j REDIRECT --to-port 8080 $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -s 172.16.0.0/24 --dport 80 -j REDIRECT --to-port 8080 # # POSTROUTING chain # $IPTABLES -t nat -A POSTROUTING -s 10.0.0.0/24 -j MASQUERADE $IPTABLES -t nat -A POSTROUTING -s 172.16.0.0/24 -j MASQUERADE $IPTABLES -t nat -A POSTROUTING -o $INET2_IFACE -s 192.168.0.0/24 -d 81.113.95.242 -j MASQUERADE $IPTABLES -t nat -A POSTROUTING -s 192.168.0.0/24 -d 192.168.0.0/24 -p tcp -j SNAT --to 192.168.0.1 $IPTABLES -t nat -A POSTROUTING -s $DMZ_SIENA_IP -o $INET_IFACE -j SNAT - --to-source $SIENA_IP $IPTABLES -t nat -A POSTROUTING -s $DMZ_DOMINI_IP -o $INET_IFACE -j SNAT - --to-source $DOMINI_IP $IPTABLES -t nat -A POSTROUTING -s $DMZ_EXCHANGE_IP -o $INET_IFACE -j SNAT - --to-source $EXCHANGE_IP $IPTABLES -t nat -A POSTROUTING -s $DMZ_ELEKTRA_IP -o $INET_IFACE -j SNAT - --to-source $ELEKTRA_IP $IPTABLES -t nat -A POSTROUTING -s $DMZ_LEONARDO_IP -o $INET_IFACE -j SNAT - --to-source $LEONARDO_IP $IPTABLES -t nat -A POSTROUTING -s $DMZ_PROXYSAT_IP -o $INET_IFACE -j SNAT - --to-source $PROXYSAT_IP There's the full IP...i hope that anyone try to hack me ;-) Oz - -- Mulder: I know what I saw, Scully. and I saw you about to do the wild thing with some stranger! "The X-Files: Genderbender" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFArN7OYuBSFbgkEysRAvDOAKCXTRreZTgXJU04HoY17Ty2zbsBqgCgm7iv AmsqRbGcm2wc5e3l985xilA= =DCpW -----END PGP SIGNATURE-----
