regla tallafoc a un horari determinat

iptables -I FORWARD 1 -p tcp --sport 53 -d 10.1.1.0/22 -m time --timestart 18:30 --timestop 21:30 --weekdays Fri -j ACCEPT
iptables -I FORWARD 1 -p tcp --sport 53 -d 10.1.23.0/24  -m time --timestart 18:30 --timestop 21:30 --weekdays Fri -j ACCEPT
iptables -I FORWARD 1 -p udp --sport 53 -d 10.1.1.0/22  -m time --timestart 18:30 --timestop 21:30 --weekdays Fri -j ACCEPT
iptables -I FORWARD 1 -p udp --sport 53 -d 10.1.23.0/24  -m time --timestart 18:30 --timestop 21:30 --weekdays Fri -j ACCEPT
iptables -I FORWARD 1 -p tcp --sport 53 -d 10.1.6.0/24  -m time --timestart 18:30 --timestop 21:30 --weekdays Fri -j ACCEPT
iptables -I FORWARD 1  -p udp --sport 53 -d 10.1.6.0/24  -m time --timestart 18:30 --timestop 21:30 --weekdays Fri -j ACCEPT

iptables -I FORWARD 1 -s 10.1.1.0/22 -p tcp --dport 53 -m time --timestart 18:30 --timestop 21:30 --weekdays Fri -j ACCEPT
iptables -I FORWARD 1 -s 10.1.23.0/24 -p tcp --dport 53 -m time --timestart 18:30 --timestop 21:30 --weekdays Fri -j ACCEPT
iptables -I FORWARD 1 -s 10.1.1.0/22 -p udp --dport 53 -m time --timestart 18:30 --timestop 21:30 --weekdays Fri -j ACCEPT
iptables -I FORWARD 1 -s 10.1.23.0/24  -p udp --dport 53 -m time --timestart 18:30 --timestop 21:30 --weekdays Fri -j ACCEPT
iptables -I FORWARD 1 -s 10.1.6.0/24 -p tcp --dport 53 -m time --timestart 18:30 --timestop 21:30 --weekdays Fri -j ACCEPT
iptables -I FORWARD 1 -s 10.1.6.0/24 -p udp --dport 53 -m time --timestart 18:30 --timestop 21:30 --weekdays Fri -j ACCEPT

regles per divendres des de 18:30 a 21:30 es poguin fer peticiones als servidors dns arrel o qualsevol altre extern.