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Old 06-24-2005, 02:59 PM   #1
MPowers
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Registered: Jun 2005
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Two-way NAT routing


Hello,

I have network like that:


(CLIENT1) (CLIENT2)

((( MY ROUTER)))

(Gateway-192.168.0.1) (Gateway-192.168.0.2)



Client 1 and 2 now is using an internet connection with iptables NAT from gateway-1. But the main idea is to make some ports (ex.6667) from client1 to be forwarded to gateway2's internet connection.

How I can do that?
 
Old 06-24-2005, 03:24 PM   #2
SirGertrude
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Depends... Are you saying that your router is the gateway with both IP addresses bound to a single or multiple interfaces, or are you saying that your router is a separate entity from the two gateways?

If your router is the gateway with two IP addresses you can use "iptables -j SNAT" to define what traffic leaves what IP.

If your router sends traffic to one of two external gateways you are looking at policy routing.
 
Old 06-24-2005, 03:35 PM   #3
MPowers
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The gateways is another computers on another interfaces
 
Old 06-24-2005, 04:24 PM   #4
SirGertrude
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This means you will need to do policy routing. I recommend using the firewall mark in iptables and routing packets based on this mark.

Here is a good reference site: http://www.compendium.com.ar/policy-routing.txt

Section 6 talks about the fwmark method.

Another good resource I found on Google: http://www.monkeynoodle.org/comp/net...ing-HOWTO.html

Hope this helps
 
  


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