RE: Need help on NAT

["Saeed Zamani" <szamani@concept.ae>]

   Thank you all for alternative solutions. Good help for me.
Thanks,
Saeed Zamani.
-----Original Message-----
From: Fabian Hartmann [mailto:realdeal@realdealz.ch] 
Sent: Tuesday, February 10, 2004 3:37 PM
To: Saeed Zamani
Cc: netfilter@lists.netfilter.org
Subject: Re: Need help on NAT


hi Saeed
There is an iptables patch called "nth" which allows you to match every
Nth packet encountered. 
That includes load-balancing such as you desire like every 4 received
packet, 
SNAT first to the ip of ISP1, the other three to the ip of ISP2.

i. e.:  iptables -t nat -A POSTROUTING -o eth0 -m nth --counter 7 \
             --every 4 --packet 0 -j SNAT --to-source $ISP1
        iptables -t nat -A POSTROUTING -o eth0 -m nth --counter 7 \
             --every 4 --packet 1 -j SNAT --to-source $ISP2
        iptables -t nat -A POSTROUTING -o eth0 -m nth --counter 7 \
             --every 4 --packet 2 -j SNAT --to-source $ISP2
        iptables -t nat -A POSTROUTING -o eth0 -m nth --counter 7 \
             --every 4 --packet 2 -j SNAT --to-source $ISP2

have a look at this
http://cvs.netfilter.org/patch-o-matic-ng/nth/help?rev=1.2

It is available in the netfilter patch-o-matic base repository

---
Fabian Hartmann

realdeal@realdealz.ch
www.realdealz.ch