I got your point, in the firewall rule , i create a rule for the IP range of my gateway and at a specific time i drop the forward chain and so the Gateway will be fault by itself so the browsing will stop and the same for enabling it .
am not using portal captive, still in the firewall chain if i use a rule to enbable or disable the forward chain, I guess when disabling it , the browsing will stop when the request pas through this gateway ,
As i can understand from your reply, i have to go to the startup/cron tab and create a firewall rule to disable the forward chain through this gateway (IP address) ?? Right ??
and in case of disabling forward chain through this ip or gateway won’t my users get a timeout page from time to time in their browsers ??