First of all, thanks Henrik! The problem was mine. I mean: what I was thining of was a Layer 7 solution using virtual IP address, just to let the two squid asnwer to the clients without passing back through the Layer 7 machine! In such a case I do need virtual IP and there should surely be some things to modify in squid.conf Anyway, yes, using a simple Layer7 solution together with NAT I don't need any virtual IP as well as any particular change in squid.conf! Thanks! Marco
