Well you can't, but that wouldn't work with routing either, and it is not the situation at hand: in the article there are multiple IPs on the VPS: > you now ha

Well you can't, but that wouldn't work with routing either, and it is not the situation at hand: in the article there are multiple IPs on the VPS: > you now have multiple real-world IP addresses that people can get to In your new situation that is not the one in the article, you can just use different ports.