[RST, ACK] from F5

I'd blame the client here. The BIG-IP has long-since closed its connection to the server, and has initiated a 4-way close to the client. The client has not responded by closing back to the BIG-IP, so the connection will at this point be in FIN-WAIT-2 on the BIG-IP and CLOSE-WAIT on the client. BIG-IP waits almost 9 seconds before sending a RST to tear down the connection, which will release connection resources on both the BIG-IP as well as the client.

 

 

My question would be why the client is not closing the connection upon receiving a close from the BIG-IP.

 

 

Disclaimer: just an opinion, not an F5 employee, not 100% computer literate, not a lawyer, etc. etc.