Why doesn't custom redirect work?

Question

Computer networks

There are 2 van ports. Both have internet. There are 2 networks, one goes through the first Internet, the second through the second. To do this, in the mangle, I do mark routing through prerouting and in the routes, specifying the gateway, I specify this brand. After that, port forwarding through NAT stops working. Tell me what am I missing?

Answer 1

The response from the typewriter to which you are forwarding does not know which interface to come through

Answer 2

NAT rules need to be duplicated. In each, you need to specify "In. Interface" WAN1 & WAN2, respectively.