Dear Hamstra thanks you for your suggestion.
Surely it was pike module that was kicking in and blocking my IP address.
But I am unable to clearly understand these two params of pike module.
modparam("pike", "sampling_time_unit", 1)
modparam("pike", "reqs_density_per_unit", 500)
If I want to bloc
I do not recall if pike is enabled by default in the base config file or not,
but you may be running into it blocking you.
Check to see if WITH_ANTIFLOOD is defined. If it is and you want it you will
need to adjust your pike modparams. If it is enabled, and you do not needed
remove the defin