[gentoo-user] Force app to use specific outgoing ip address?

[Crayon Shin Chan]

I have a gateway machine with a single NIC but several virtual IP 
addresses. I have several instances of apache running, each bound to 
listen on their own virtual IP address. All the instances of apache are 
running in proxy mode. What is happening now is that all the apache 
instances use the 'main' IP address for all outgoing connections.

What I would like is for each instance of apache to use their own virtual 
IP address for outgoing connections. Is it possible to rig iptables to 
achieve this? And how would I do this?

NB I'm open to solutions using proxies other than apache.

thanks
-- 
Crayon
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