[RESOLVIDO]
Tested and okey..!
Valores dinâmicos:
WAN Interface: vlan10 LAN Interface: br0
LAN Web server IP: 192.168.1.1 LAN Web server Port: 8080
Router WAN IP: 192.168.10.129 Router LAN IP: 192.168.1.254
1. encaminhamento de portes rules
iptables -I FORWARD 1 -i vlan10 -p tcp -d 192.168.1.1 --dport 8080 -j ACCEPT
iptables -A PREROUTING -t nat -i vlan10 -p tcp --dport 8080 -j DNAT --to 192.168.1.1
2. nat-loopback rules
iptables -t nat -A PREROUTING -i br0 -s 192.168.1.0/24 -d 192.168.10.129/32 -p tcp -m tcp --dport 8080 -j DNAT --to-destination 192.168.1.1
iptables -t nat -A POSTROUTING -o br0 -s 192.168.1.0/24 -d 192.168.1.1/32 -p tcp -m tcp --dport 8080 -j SNAT --to-source 192.168.1.254
NOTA: Lembre-se de desabilitar a outra interface LAN da rede durante o teste.