Block internet access at certain times

[Thomas_R]

Hello
a solution with V5 here:

Activate group with cron

Hello, I'm looking for a way to activate a group from 9 a.m. to 6 p.m. and have it deactivated from 6:01 p.m. to 8:59 a.m. with school at home I want to block social media during school hours. Thank you in advance for your help.