封杀MSN
/sbin/iptables -I FORWARD -d gateway.messenger.hotmail.com -j DROP
/sbin/iptables -I FORWARD -p tcp --dport 1863 -j DROP
封杀QQ
/sbin/iptables -A FORWARD -p tcp -d tcpconn.tencent.com --dport 80 -j DROP
/sbin/iptables -A FORWARD -p tcp -d tcpconn.tencent.com --dport 443 -j DROP
/sbin/iptables -A FORWARD -p tcp -d tcpconn2.tencent.com -j DROP
/sbin/iptables -A FORWARD -i eth0 -p udp --dport 8000 -j DROP
封杀BT
/sbin/iptables -A FORWARD -i eth0 -p tcp --dport 6881:6890 -j DROP