Facebook Block Https

nano /etc/rc.d/rc.firewall.local

iptables -t nat -I PREROUTING -m tcp -p tcp -m iprange --dst-range 69.63.176.0-69.63.191.255 --dport 80 -j DROP
iptables -t nat -I PREROUTING -m tcp -p tcp -d 66.220.147.22 --dport 80 -j DROP
iptables -t nat -I PREROUTING -m tcp -p tcp -d 66.220.147.22 --dport 443 -j DROP
iptables -t nat -I PREROUTING -m tcp -p tcp -m iprange --dst-range 69.63.176.0-69.63.191.255 --dport 443 -j DROP

Source

Another method ( Tested Work )

FACEBOOK_ALLOW="192.168.1.12 192.168.1.14 192.168.1.111"
iptables -N FACEBOOK
 
iptables -I FORWARD -m tcp -p tcp -m iprange --dst-range 66.220.144.0-66.220.159.255 --dport 443 -j FACEBOOK
iptables -I FORWARD -m tcp -p tcp -m iprange --dst-range 69.63.176.0-69.63.191.255 --dport 443 -j FACEBOOK
iptables -I FORWARD -m tcp -p tcp -m iprange --dst-range 204.15.20.0-204.15.23.255 --dport 443 -j FACEBOOK
iptables -I FORWARD -m tcp -p tcp -m iprange --dst-range 66.220.144.0-66.220.159.255 --dport 80 -j FACEBOOK
iptables -I FORWARD -m tcp -p tcp -m iprange --dst-range 69.63.176.0-69.63.191.255 --dport 80 -j FACEBOOK
iptables -I FORWARD -m tcp -p tcp -m iprange --dst-range 204.15.20.0-204.15.23.255 --dport 80 -j FACEBOOK
 
## FACEBOOK ALLOW
for face in $FACEBOOK_ALLOW; do
    iptables -A FACEBOOK -s $face -j ACCEPT
done
iptables -A FACEBOOK -j REJECT

Source