F5 maintains a SSL session opened until 16 seconds after it receives a FIN request
Hi, I´ve configured a basic https monitor with these parameters:
Send string: HEAD / HTTP/1.1\r\nHost: \r\nConnection: close
Receive string: HTTP/1.1
It is working fine, the server is marked up when it is accesible and down when it is not. However, I did a packet capture to analyse the performance of this monitor and I noticed the following: After the F5 receives a FIN request from the server, it (the f5) maintains the session opened for sixteen seconds more, after this time the F5 ack the fin request and closes the connection.
Why is this happening? I mean, Why even though the F5 receives a FIN it waits sixteen seconds to close the session? What I´d like to happen is that the F5 closes the connection once it receives the FIN request, not after sixteen seconds.
Note: the sixteen seconds are not related with the frecuency nor the timeout, I´ve changed these parameters and the issue is the same.