Web filtering profiles and Time Period Definitions

Hello, i'm french so sorry for my english :cool:

i have probleme with time period definitions and web filtering profiles, when the period is exceeded the computer no longer have access to internet so it's good, but this computer can ping IP ( example : 8.8.8.8 or other ).

is this normal ?

I would like to block all traffic when the period is exceeded.

thank you for your help

nota :
Licence home
Firmware version:8.302