Question:
Can Netscaler monitor connections be closed by sending the RESET rather than sending the FIN packet to the backend server?

Answer:
Yes, we can achieve this by changing the load balancing parameter as shown below:



NOTE: By changing this option this will change the behaviour for all services created on Netscaler. So this is a kind of global option but not specific to any particular service.

From NetScaler Version 11.1 releases, it is possible to send a RESET instead of a FIN to close the monitor connection just for a specific service or service-group and not for all services.

In 11.1 new parameter is introduced '-monitorConnectionClose ( RESET | FIN )'

CLI command for the same is as below:

set service <service_name> -monitorConnectionClose ( RESET | FIN )

In GUI, you could find this option under Basic Settings of Service as shown below: