Time users

Hello list, Iam using freeradius with Active directory. Everythings is ok. but I need to put time users, example only connect at a specific time. I try to put it in iptables rules, but when I put this rules nobody can connect. example $IPTABLES -A OUTPUT -d x.x.x.x -p tcp -m multiport --sports 1812,1813 -m time --timestart 00:00 --timestop 20:00 --weekdays Sun,Mon,Tue,Wed,Thu,Fri,Sat -j ACCEPT Thereis some file in freeradius that make it..???