Load Balancing under Linux (suggestion)

[david nicol]

Gerald Combs wrote:

> > what does iptables to to current masqed connections when you alter the
> > rules?
> > If it leaves them alone [...]
...
>   TCP stacks don't like
> it when your source address and/or port change all of a sudden.

So we know from experience that the connections already tracked by
ip_conntrack will not survive a change in rules?  That's really the
question I'm asking.  I had the impression that the nat table was
responsible for setting up the connection tracking stuff and then
the connection tracking stuff operates on non-SYN packets without
consulting the rules.

I wonder if iptables could be asked to examine the destination address
and choose one interface or the other depending on the lowest bit in
the IP?  That would be a static mapping that would even out with a lot
of traffic