I'd say: iptables -t nat -A PREROUTING -i eth1 -d 1.2.3.4 -p tcp --dport 80 -j DNAT --to-destination 10.1.1.2 iptables -A FORWARD -p tcp --dport 80 -d 10.1.1.2 -j ACCEPT also: iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT IMHO... well... you can delete the H from IMHO... but that's just me! :-) On 9/25/05, Vincent Blondel <vincent@xxxxxxxxxxxx> wrote: > Hi, > > I am trying to configure next set up so a public host can connect to my web server located in a dmz. > > ----------------------- > public host --> | eth1 eth2 | --> web server > x.x.x.x | 1.2.3.4 10.1.1.1 | 10.1.1.2:80 > ---------------------- > > As far as I can understand, this typically corresponds to a mix of DNAT, SNAT and FORWARD rules. Below you can find the > rules I have configured until now. > > ##################################################################### > > # Enable ip forward > echo 1 > /proc/sys/net/ipv4/ip_forward > > # Unlimited traffic on the loopback interface > iptables -A INPUT -i lo -j ACCEPT > iptables -A OUTPUT -o lo -j ACCEPT > > # Set the default policy to drop > iptables --policy INPUT DROP > iptables --policy OUTPUT DROP > iptables --policy FORWARD DROP > > iptables -t nat --policy PREROUTING DROP > iptables -t nat --policy OUTPUT DROP > iptables -t nat --policy POSTROUTING DROP > > iptables -t mangle --policy PREROUTING DROP > iptables -t mangle --policy POSTROUTING DROP > > iptables -t nat -A POSTROUTING -o eth1 -j SNAT --to-source 1.2.3.4 > > iptables -t nat -A PREROUTING -i eth1 -p tcp --sport 1024:65535 -d 1.2.3.4 --dport 80 -j DNAT --to-destination 10.1.1.2 > iptables -A FORWARD -i eth1 -o eth2 -p tcp --sport 1024:65535 -d 10.1.1.2 --dport 80 -m state --state NEW -j ACCEPT > > iptables -A FORWARD -i eth2 -o eth1 -m state --state ESTABLISHED,RELATED -j ACCEPT > iptables -A FORWARD -i eth1 -o eth2 -m state --state ESTABLISHED,RELATED -j ACCEPT > > ##################################################################### > > But the problem is that it doesn't work and I don't know why ? So can somebody help me to solve this problem ? > > Regards > Vincent > > >
