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Old 04-22-2006, 03:54 AM   #1
deepak rawat
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Registered: Apr 2006
Posts: 37

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how to share internet with two diff class ip's


i hav one linux box connected to broadband havings ip's on eth0

ip - 172.31.1.138
netmask - 255.255.255.0
dns - 172.31.1.1
gateway-172.31.1.1


and on eth1 ip is 192.168.0.1
netmask 255.255.255.0
dns 172.31.1.1
gateway 172.31.1.1

eth1 is connected to local network through a switch or hub

client pc are having windows and linux installed in them coonected to the internet linux box through switch/hub.




i want to share the internet on all this pc's but be sure i am nt interested in squid proxy or any other proxies


i think it was donw through iptables masquerading and if not then plz also let me nw where exactly the iptable masquerading and nat works
 
Old 04-22-2006, 09:34 AM   #2
peter_robb
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Registered: Feb 2002
Location: Szczecin, Poland
Distribution: Gentoo, Debian
Posts: 2,458

Rep: Reputation: 47
Each box where the ip classes change between input and output NICs needs NAT.

You need static NAT as the ip numbers don't change, so use SNAT.

I suggest you have a good look at this iptables tutorial.
 
  


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