Transparent proxy and IP address rotation

[Kirk Hoganson <kirkhoganson@xxxxxxxxx>]

I would like to configure our squid proxy (Version 3.0.STABLE19 on Linux 
Ubuntu 10.04) to use a pool of addresses for outgoing connections.  I 
setup squid as a transparent proxy using "http_port 3128 transparent" in 
the squid.conf, and then I setup an iptables to provide source nat 
address rotation for the multiple interfaces the proxy has available.

The connections failed when attempting to source nat on the proxy.  
Would this work if I were able to use tproxy instead of transparent on 
the proxy server?  Or is there another solution within squid that would 
allow it to rotate through all available interfaces?

Thanks,
Kirk