http keep alive tmeout between bigip and client

I want to define a keep alive timeout for the client - bigip connection. In an http profile you can only configure the max. no. of connections. The keep alive timeout in an oneconnect profile defines the timeout for the bigip - webserver connections. Without this timeout the bigip waits for the tcp timeout to reset the connection. The keep alive timeout of the webbrowsers is although to big.

 

Any ideas?

 

Oliver