Correct, other than keep-alive no data. Request came from applicaiton team; for them idle conneciton is no browser activity. They don't care or don't know about lower OSI model levels activity, like TCP keep-alive.
Dmitriy_Tiper Sadly, the only thing that I have seen recently is someone creating a counter that will arbitrarily close a connection after x amount of time used rather than closing a connection that has no data traversing it over a certain period of time. The best option here would be to disable TCP keepalive on the server side if open connections is the large of a problem.