From mboxrd@z Thu Jan 1 00:00:00 1970 From: O-Zone Subject: DMZ to DMZ - COMPLETE CONFIGURATION Date: Thu, 20 May 2004 18:37:31 +0200 Sender: netfilter-admin@lists.netfilter.org Message-ID: <200405201837.36780.liste@zerozone.it> Reply-To: liste@zerozone.it Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: Content-Description: clearsigned data Content-Disposition: inline Errors-To: netfilter-admin@lists.netfilter.org List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: Text/Plain; charset="us-ascii" To: netfilter@lists.netfilter.org =2D----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =46irst thanks to all to try solve my problem. To simplify it, i've cutpast= ed=20 the full firewall configuration: #!/bin/sh # # 1.1 Internet Configuration. # INET_IP=3D"151.8.47.82" SIENA_IP=3D"151.8.47.83" DOMINI_IP=3D"151.8.47.84" LEONARDO_IP=3D"151.8.47.85" PROXYSAT_IP=3D"151.8.47.86" ELEKTRA_IP=3D"151.8.47.87" EXCHANGE_IP=3D"151.8.47.90" INET_IFACE=3D"eth0" INET2_IP=3D"81.113.95.245" SIENA2_IP=3D"81.113.95.250" DOMINI2_IP=3D"81.113.95.251" INET2_IFACE=3D"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=3D"10.0.0.1" LAN2_IP=3D"172.16.0.1" LAN_IFACE=3D"eth3" # # 1.3 DMZ Configuration. # DMZ_IP=3D"192.168.0.1" DMZ_SIENA_IP=3D"192.168.0.2" DMZ_DOMINI_IP=3D"192.168.0.3" DMZ_ELEKTRA_IP=3D"192.168.0.7" DMZ_EXCHANGE_IP=3D"192.168.0.10" DMZ_PROXYSAT_IP=3D"192.168.0.11" DMZ_LEONARDO_IP=3D"192.168.0.12" DMZ_IFACE=3D"eth2" # # 1.4 Localhost Configuration. # LO_IFACE=3D"lo" LO_IP=3D"127.0.0.1" # # 1.5 IPTables Configuration. # IPTABLES=3D"/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=20 $IPTABLES -F OUTPUT=20 $IPTABLES -F FORWARD=20 $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=20 =2D --state NEW -j REJECT --reject-with tcp-reset $IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j LOG=20 =2D --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 = =2Dj=20 ACCEPT $IPTABLES -A INPUT -p ALL -d $INET2_IP -m state --state ESTABLISHED,RELATED= -j=20 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 \ =2D --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=20 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=20 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=20 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=20 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=20 =2D --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=20 =2D --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 --dpo= rt=20 1494 -j allowed # CITRIX ICA $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d 151.8.47.82 --dport= =20 1494 -j DNAT --to-destination 10.0.0.50 ########################### SERVIZI DOMINI.TDSIENA.IT=20 $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -= m=20 multiport --dports 25,110 -j allowed # SOLO SIENA $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP = =2Dm=20 multiport --dports 20,21,53,80 -j allowed $IPTABLES -A FORWARD -p UDP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP = =2Dm=20 multiport --dports 53 -j ACCEPT $IPTABLES -A FORWARD -p TCP -i $INET2_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP = =2Dm=20 multiport --dports 25,110 -j allowed # SOLO SIENA $IPTABLES -A FORWARD -p TCP -i $INET2_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP= -m=20 multiport --dports 20,21,53,80 -j allowed $IPTABLES -A FORWARD -p UDP -i $INET2_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP= -m=20 multiport --dports 53 -j ACCEPT $IPTABLES -A FORWARD -p TCP -i $LAN_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -m= =20 multiport --dports 25,110 -j allowed # SOLO SIENA $IPTABLES -A FORWARD -p TCP -i $LAN_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP -= m=20 multiport --dports 20,21,53,80 -j allowed $IPTABLES -A FORWARD -p UDP -i $LAN_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP -= m=20 multiport --dports 53 -j ACCEPT $IPTABLES -A FORWARD -p ICMP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_DOMINI_IP= -j=20 icmp_packets $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $DOMINI_IP -m=20 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=20 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=20 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=20 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 multip= ort=20 =2D --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 multip= ort=20 =2D --dport 25,110 -j DNAT --to-destination $DMZ_SIENA_IP ########################### SERVIZI SIENA.TDSIENA.IT=20 $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -= m=20 multiport --dports 25,53,110 -j allowed $IPTABLES -A FORWARD -p UDP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP -= m=20 multiport --dports 53 -j allowed $IPTABLES -A FORWARD -p ICMP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP = =2Dj=20 icmp_packets $IPTABLES -A FORWARD -p TCP -i $INET2_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP = =2Dm=20 multiport --dports 25,53,110 -j allowed $IPTABLES -A FORWARD -p UDP -i $INET2_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP = =2Dm=20 multiport --dports 53 -j allowed $IPTABLES -A FORWARD -p ICMP -i $INET2_IFACE -o $DMZ_IFACE -d $DMZ_SIENA_IP= -j=20 icmp_packets $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $SIENA_IP -m multip= ort=20 =2D --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 multip= ort=20 =2D --dports 53 -j DNAT --to-destination $DMZ_SIENA_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $INET2_IFACE -d $SIENA_IP -m=20 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=20 multiport --dports 53 -j DNAT --to-destination $DMZ_SIENA_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -d $SIENA_IP -m multipo= rt=20 =2D --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 multipo= rt=20 =2D --dports 53 -j DNAT --to-destination $DMZ_SIENA_IP ########################### SERVIZI EXCHANGE.TDSIENA.IT=20 $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_EXCHANGE_I= P=20 =2D -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_I= P=20 =2D -m multiport --dports 135,389 -j allowed $IPTABLES -A FORWARD -p ICMP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_EXCHANGE_= IP=20 =2D -j icmp_packets $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $EXCHANGE_IP -m=20 multiport --dports 80,110,135,143,389,443,691,3268 -j DNAT --to-destination= =20 $DMZ_EXCHANGE_IP $IPTABLES -t nat -A PREROUTING -p UDP -i $INET_IFACE -d $EXCHANGE_IP -m=20 multiport --dports 135,389 -j DNAT --to-destination $DMZ_EXCHANGE_IP ########################### SERVIZI PROXYSAT.TDSIENA.IT=20 $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_PROXYSAT_I= P=20 =2D --dport 80 -j allowed $IPTABLES -A FORWARD -p ICMP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_PROXYSAT_= IP=20 =2D -j icmp_packets $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $PROXYSAT_IP --dpor= t=20 80 -j DNAT --to-destination $DMZ_PROXYSAT_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -d $PROXYSAT_IP --dport= 80=20 =2D -j DNAT --to-destination $DMZ_PROXYSAT_IP ########################### SERVIZI LEONARDO $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_LEONARDO_I= P=20 =2D -m multiport --dports 80,3389 -j allowed $IPTABLES -A FORWARD -p TCP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_LEONARDO_I= P=20 =2D --dport 4000:10000 -j allowed $IPTABLES -A FORWARD -p UDP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_LEONARDO_I= P=20 =2D --dport 4000:10000 -j allowed $IPTABLES -A FORWARD -p ICMP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_LEONARDO_= IP=20 =2D -j icmp_packets $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $LEONARDO_IP -m=20 multiport --dports 80,3389 -j DNAT --to-destination $DMZ_LEONARDO_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $LEONARDO_IP --dpor= t=20 4000:10000 -j DNAT --to-destination $DMZ_LEONARDO_IP $IPTABLES -t nat -A PREROUTING -p UDP -i $INET_IFACE -d $LEONARDO_IP --dpor= t=20 4000:10000 -j DNAT --to-destination $DMZ_LEONARDO_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -d $LEONARDO_IP -m=20 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=20 multiport --dports 20,21,22,25,80,110 -j allowed $IPTABLES -t nat -A PREROUTING -p TCP -i $INET_IFACE -d $ELEKTRA_IP -m=20 multiport --dports 20,21,22,25,80,110 -j DNAT --to-destination=20 $DMZ_ELEKTRA_IP $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -d $ELEKTRA_IP -m=20 multiport --dports 20,21,22,25,80,110 -j DNAT --to-destination=20 $DMZ_ELEKTRA_IP $IPTABLES -A FORWARD -p ICMP -i $INET_IFACE -o $DMZ_IFACE -d $DMZ_ELEKTRA_I= P=20 =2D -j icmp_packets # Squid Trasparent Proxy $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -s 10.0.0.0/24 --dport = 80=20 =2D -j REDIRECT --to-port 8080 $IPTABLES -t nat -A PREROUTING -p TCP -i $LAN_IFACE -s 172.16.0.0/24 --dpor= t=20 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=20 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 = =2Dj=20 SNAT --to 192.168.0.1 $IPTABLES -t nat -A POSTROUTING -s $DMZ_SIENA_IP -o $INET_IFACE -j SNAT=20 =2D --to-source $SIENA_IP $IPTABLES -t nat -A POSTROUTING -s $DMZ_DOMINI_IP -o $INET_IFACE -j SNAT=20 =2D --to-source $DOMINI_IP $IPTABLES -t nat -A POSTROUTING -s $DMZ_EXCHANGE_IP -o $INET_IFACE -j SNAT= =20 =2D --to-source $EXCHANGE_IP $IPTABLES -t nat -A POSTROUTING -s $DMZ_ELEKTRA_IP -o $INET_IFACE -j SNAT=20 =2D --to-source $ELEKTRA_IP $IPTABLES -t nat -A POSTROUTING -s $DMZ_LEONARDO_IP -o $INET_IFACE -j SNAT= =20 =2D --to-source $LEONARDO_IP $IPTABLES -t nat -A POSTROUTING -s $DMZ_PROXYSAT_IP -o $INET_IFACE -j SNAT= =20 =2D --to-source $PROXYSAT_IP There's the full IP...i hope that anyone try to hack me ;-) Oz =2D --=20 Mulder: I know what I saw, Scully. and I saw you about to do the wild thing with some stranger! "The X-Files: Genderbender" =2D----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFArN7OYuBSFbgkEysRAvDOAKCXTRreZTgXJU04HoY17Ty2zbsBqgCgm7iv AmsqRbGcm2wc5e3l985xilA=3D =3DDCpW =2D----END PGP SIGNATURE-----