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@xxxxxxxxxxxx
www.realdealz.ch
