virtual ip and lookup interface

[zergo]

Good morning, I have a port forwarding problem. Here is the conf : A loopback interface (operator-WAN) with the public address given by my ISP (149.x.y.z) A physical interface wan1 (0.0.0.0 / 0) on which is connected the router FAI An Operator-Internal VLAN interface on this physical interface with a private 10.1.4.45 ip that can communicate with the private IP of the router of my ISP 10.1.4.46 (on their vlan) A LAN interface 10.10.10.254/24 internal1

Everything works well !

I want to redirect what happens on port 80 to a device 10.10.10.250 I tried to make a virtual ip on the interface wan1 to the equipment and on the vlan1 but without success. With very open filtering rules. What is the best practice? Thank you in advance.