/etc/firewall.user

WAN=$(nvram get wan_ifname)

LAN=$(nvram get lan_ifname)



iptables -F input_rule

iptables -F output_rule

iptables -F forwarding_rule

iptables -t nat -F prerouting_rule

iptables -t nat -F postrouting_rule



iptables -t nat -A prerouting_rule -i $WAN -p tcp --dport 8080 -j DNAT --to 192.168.1.3:80

iptables        -A forwarding_rule -i $WAN -p tcp --dport 80 -d 192.168.1.3 -j ACCEPT

iptables -L | grep 80

ACCEPT     tcp  --  anywhere             192.168.1.3         tcp dpt:80

iptables -t nat -A prerouting_rule -i $WAN -p tcp --dport 8080 -j ACCEPT

iptables        -A input_rule      -i $WAN -p tcp --dport 8080 -j ACCEPT

iptables -t nat -A prerouting_rule -i $WAN -j DNAT --to 192.168.1.1          

iptables        -A forwarding_rule -i $WAN -d 192.168.1.1 -j ACCEPT