Yes, correct. I cannot do an HTTP profile and look at HTTP packet with a FastL4. I'm thinking of using a standard port 80 with no pool associated with it. All load balancing decisions would be made by the irule looking for a certain source hostname. The Bigip is basically just going to direct that taffic to a webserver. Hopefully when it gets to the correct webserver, it will know what to do with this. This is a pretty crummy App that cannot even use an HTTP cookie correctly. I had to switch to a source address persistence profile last spring. Now it's just figuring out how to code the Irule. Of course they want this in production by wendesday morning with no test environment..