443—>8006
iptables -t nat -A PREROUTING -p tcp –dport 443 -j REDIRECT –to-ports 8006
#drop 8006
iptables -A INPUT -i ! lo -p tcp –dport 8006 -j DROP
#save setting
iptables-save > /etc/iptables.up.rules
echo -e ‘#!/bin/sh\n/sbin/iptables-restore < /etc/iptables.up.rules' > /etc/network/if-pre-up.d/iptables
chmod +x /etc/network/if-pre-up.d/iptables