How to configure network interface port configuration?

I have an ubuntu server with 4 interfaces, eth1, eth2, eth3 and wifi0. The eth interfaces are the main internet, they will be sometimes unplugged or restarted or else there are metric 0 so all traffic goes over one of there wich one is now active, i setup the wifi0 interface to metric 400, just to prevent any traffic goes through that because i want use that only as traffic for ssh access from public internet to my ubuntu server What i want is, that all traffic income/outcome wich are over port 400 (my ssh port) gets handled over the wifi0 interface I need setup an rule like ( forward all traffic wich come or goes over port 400 to wifi0)