Many Load Balancers allow direct server return, which is what you are looking for. In fact I would be surprised to find a hardware load balancer not implementing it. However, there are pros and cons to this approach - some articles you may want to look at include this one stating some of the negatives and this one explaining the process in more detail as it relates to Windows Server 2008. Basically, whatever vendor you look at you should be looking for their information or DSR, Direct Server Return.
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