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05/02/2002 at 07:36PM PDT, ID: 20296555
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6.6

iptables

Asked by Ted22 in Linux Networking

Tags: iptables


I am running apache on different ports and computers on a closed network.

server 1 eth0 public 56.52.33.12
         eth1 closed lan 192.168.1.1

server 2 192.168.1.2

server 3 192.168.1.3

server 4 192.168.1.4

On the public server I did this:

iptables -t nat -A PREROUTING -i eth0 -p tcp \
--sport 1024:65535 -d 56.52.33.12 --dport 81 \
-j DNAT --to-destination 192.168.1.2

iptables -A FORWARD -i eth0 -o eth1 -p tcp \
--sport 1024:65535 -d 192.168.1.2 --dport 81 \
-m state --state NEW -j ACCEPT

 
iptables -t nat -A PREROUTING -i eth0 -p tcp \
--sport 1024:65535 -d 56.52.33.12 --dport 82 \
-j DNAT --to-destination 192.168.1.3

iptables -A FORWARD -i eth0 -o eth1 -p tcp \
--sport 1024:65535 -d 192.168.1.3 --dport 82 \
-m state --state NEW -j ACCEPT

iptables -t nat -A PREROUTING -i eth0 -p tcp \
--sport 1024:65535 -d 56.52.33.12 --dport 83 \
-j DNAT --to-destination 192.168.1.4

iptables -A FORWARD -i eth0 -o eth1 -p tcp \
--sport 1024:65535 -d 192.168.1.4 --dport 83 \
-m state --state NEW -j ACCEPT

iptables -A FORWARD -i eth1 -o eth0 \
-m state --state ESTABLISHED,RELATED -j ACCEPT

iptables -A FORWARD -i eth0 -o eth1 \
-m state --state ESTABLISHED,RELATED -j ACCEPT

What ever I do I can only seem to connect to one of the servers. It doesn't matter what port I use or what ip.
Packets only seem to forward to the one server.
The other two do not work and I cannot figure out why one does and the others don't.

56.52.33.12:81 connects to 192.168.1.2 fine but the others don't work at all.
[+][-]05/03/02 01:24 AM, ID: 6988120

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About this solution

Zone: Linux Networking
Tags: iptables
Sign Up Now!
Solution Provided By: jlevie
Participating Experts: 3
Solution Grade: A
 
 
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