Thats cool and all, but using your firewalls for loadbalancing is kinda.. uh... not so good.
As demonstrated, even derptastic HAProxy is better than the loadbalancing stuff built into your FW...
For about $50-100/each you can buy 10 year old loadbalancers via eBay that do a WAY better job of this. They're more accurate AND use less cpu/watts than HAProxy will as well.<p>Just something to consider...